diff --git a/.eslintrc b/.eslintrc
index c68cda8..d4bb3ed 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -8,5 +8,16 @@
     "no-prototype-builtins": 1,
     "no-caller": 1,
     "indent": [2, 4, { "SwitchCase": 1, "VariableDeclarator": 1, "outerIIFEBody": 1 }]
+  },
+  "env": {
+    "node": true,
+    "mocha": true,
+    "amd": true
+  },
+  "globals": {
+    "L": true,
+    "sinon": true,
+    "chai": true,
+    "happen": true
   }
 }
\ No newline at end of file
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..ec48c89
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,55 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+  release:
+    types:
+      - created
+  schedule:
+    - cron: '0 2 * * *'
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup node
+        uses: actions/setup-node@v2
+        with:
+          node-version: 12
+          cache: 'npm'
+      - run: npm ci
+      - run: npm run lint
+
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node: [ '12', '14', '16' ]
+    name: Node ${{ matrix.node }} unit test
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup node
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node }}
+          cache: 'npm'
+      - run: npm ci
+      - run: npm install leaflet togeojson --no-save
+      - run: npm test
+
+  publish:
+    needs: [lint, test]
+    runs-on: ubuntu-latest
+    if: ${{ github.event_name == 'release' && github.event.action == 'created' }}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 12
+      - uses: JS-DevTools/npm-publish@v1
+        with:
+          token: ${{ secrets.NPM_TOKEN }}
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 70960e3..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,19 +0,0 @@
-language: node_js
-node_js:
-  - "9"
-  - "8"
-  - "6"
-  - "4"
-
-sudo: false
-
-cache:
-  directories:
-    - node_modules
-
-install:
-  - npm install
-  - npm install leaflet@^1.2.0 togeojson@^0.16.0 --no-save
-
-script:
-  - "npm test"
diff --git a/README.md b/README.md
index 2598484..eb23259 100644
--- a/README.md
+++ b/README.md
@@ -12,14 +12,18 @@ Check out the [demo](http://makinacorpus.github.io/Leaflet.FileLayer/) !
 
 For GPX and KML files, it currently depends on [Tom MacWright's togeojson.js](https://github.com/tmcw/togeojson).
 
-[![Build Status](https://travis-ci.org/makinacorpus/Leaflet.FileLayer.png?branch=master)](https://travis-ci.org/makinacorpus/Leaflet.FileLayer)
+![Build Status](https://github.com/makinacorpus/Leaflet.FileLayer/actions/workflows/ci.yml/badge.svg)
 
 Install
 -----
 In order to use this plugin in your app you can either:
 * install it via your favorite package manager:
-    * `npm i leaflet-filelayer`
-    * `bower install git://github.com:makinacorpus/Leaflet.FileLayer.git`
+
+```shell
+npm i leaflet-filelayer
+bower install git://github.com:makinacorpus/Leaflet.FileLayer.git
+```
+
 * download the repository and import the `leaflet.filelayer.js` file in your app.
 
 Dependencies and compatibilities
@@ -118,7 +122,7 @@ Changelog
 Authors
 -------
 
-[![Makina Corpus](http://depot.makina-corpus.org/public/logo.gif)](http://makinacorpus.com)
+[![Makina Corpus](https://github.com/makinacorpus.png)](https://www.makina-corpus.com)
 
 Contributions
 
diff --git a/dev/index.html b/dev/index.html
index a09a840..cc6be95 100644
--- a/dev/index.html
+++ b/dev/index.html
@@ -5,7 +5,7 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/4.2.0/normalize.min.css">
-    <link rel="stylesheet" href="https://unpkg.com/leaflet@1.1.0/dist/leaflet.css">
+    <link rel="stylesheet" href="../node_modules/leaflet/dist/leaflet.css">
     <style>
       .icon {
         max-width: 70%;
@@ -17,8 +17,8 @@
 <body>
     <div id="map" style="width: 100vw; height: 100vh;"></div>
 </body>
-<script src="https://unpkg.com/leaflet@1.1.0/dist/leaflet.js"></script>
-<script src="https://unpkg.com/togeojson@0.14.2"></script>
+<script src="../node_modules/leaflet/dist/leaflet.js"></script>
+<script src="../node_modules/togeojson/togeojson.js"></script>
 <script src="../src/leaflet.filelayer.js"></script>
 <script>
   (function (window) {
diff --git a/docs/index.html b/docs/index.html
index d85f71e..0376958 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -30,7 +30,7 @@ <h1>Leaflet Filelayer plugin</h1>
         <div>Icons made by <a href="http://www.freepik.com" title="Freepik">Freepik</a> from <a href="http://www.flaticon.com" title="Flaticon">www.flaticon.com</a></div>
     </footer>
 </body>
-<script src="https://unpkg.com/leaflet@1.2.0/dist/leaflet.js"></script>
+<script src="https://unpkg.com/leaflet@1.7.1/dist/leaflet.js"></script>
 <script src="https://unpkg.com/togeojson@0.16.0"></script>
 <script src="https://unpkg.com/leaflet-filelayer@1.2.0"></script>
 <script src="menu.js"></script>
diff --git a/package-lock.json b/package-lock.json
index 423a690..26c59ef 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,25 +5,25 @@
   "requires": true,
   "dependencies": {
     "abbrev": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.0.tgz",
-      "integrity": "sha1-0FVMIlZjbi9W58LlrRg/hZQo2B8=",
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
+      "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==",
       "dev": true
     },
     "accepts": {
-      "version": "1.3.3",
-      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.3.tgz",
-      "integrity": "sha1-w8p0NJOGSMPg2cHjKN1otiLChMo=",
+      "version": "1.3.7",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
+      "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
       "dev": true,
       "requires": {
-        "mime-types": "2.1.16",
-        "negotiator": "0.6.1"
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
       }
     },
     "acorn": {
-      "version": "5.1.1",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.1.1.tgz",
-      "integrity": "sha512-vOk6uEMctu0vQrvuSqFdJyqj1Q0S5VTDL79qtjo+DhRr+1mmaD+tluFSCZqhvi/JUhXSzoZN2BhtstaPEeE8cw==",
+      "version": "5.7.4",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.4.tgz",
+      "integrity": "sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==",
       "dev": true
     },
     "acorn-jsx": {
@@ -32,7 +32,7 @@
       "integrity": "sha1-r9+UiPsezvyDSPb7IvRk4ypYs2s=",
       "dev": true,
       "requires": {
-        "acorn": "3.3.0"
+        "acorn": "^3.0.4"
       },
       "dependencies": {
         "acorn": {
@@ -55,8 +55,8 @@
       "integrity": "sha1-gv+wKynmYq5TvcIK8VlHcGc5xTY=",
       "dev": true,
       "requires": {
-        "co": "4.6.0",
-        "json-stable-stringify": "1.0.1"
+        "co": "^4.6.0",
+        "json-stable-stringify": "^1.0.1"
       }
     },
     "ajv-keywords": {
@@ -84,47 +84,55 @@
       "dev": true
     },
     "anymatch": {
-      "version": "1.3.2",
-      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-1.3.2.tgz",
-      "integrity": "sha512-0XNayC8lTHQ2OI8aljNCN3sSx6hsr/1+rlcDAotXJR7C1oZZHCNsfpbKwMjRA3Uqb5tF1Rae2oloTr4xpq+WjA==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-2.0.0.tgz",
+      "integrity": "sha512-5teOsQWABXHHBFP9y3skS5P3d/WfWXpv3FUpy+LorMrNYaT9pI4oLMQX7jzQ2KklNpGpWHzdCXTDT2Y3XGlZBw==",
       "dev": true,
       "requires": {
-        "micromatch": "2.3.11",
-        "normalize-path": "2.1.1"
+        "micromatch": "^3.1.4",
+        "normalize-path": "^2.1.1"
+      },
+      "dependencies": {
+        "normalize-path": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-2.1.1.tgz",
+          "integrity": "sha1-GrKLVW4Zg2Oowab35vogE3/mrtk=",
+          "dev": true,
+          "requires": {
+            "remove-trailing-separator": "^1.0.1"
+          }
+        }
       }
     },
     "apache-crypt": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/apache-crypt/-/apache-crypt-1.2.1.tgz",
-      "integrity": "sha1-1vxyqm0n2ZyVqU/RiNcx7v/6Zjw=",
+      "version": "1.2.5",
+      "resolved": "https://registry.npmjs.org/apache-crypt/-/apache-crypt-1.2.5.tgz",
+      "integrity": "sha512-ICnYQH+DFVmw+S4Q0QY2XRXD8Ne8ewh8HgbuFH4K7022zCxgHM0Hz1xkRnUlEfAXNbwp1Cnhbedu60USIfDxvg==",
       "dev": true,
       "requires": {
-        "unix-crypt-td-js": "1.0.0"
+        "unix-crypt-td-js": "^1.1.4"
       }
     },
     "apache-md5": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/apache-md5/-/apache-md5-1.1.2.tgz",
-      "integrity": "sha1-7klza2ObTxCLbp5ibG2pkwa0FpI=",
+      "version": "1.1.7",
+      "resolved": "https://registry.npmjs.org/apache-md5/-/apache-md5-1.1.7.tgz",
+      "integrity": "sha512-JtHjzZmJxtzfTSjsCyHgPR155HBe5WGyUyHTaEkfy46qhwCFKx1Epm6nAxgUG3WfUZP1dWhGqj9Z2NOBeZ+uBw==",
       "dev": true
     },
     "argparse": {
-      "version": "1.0.9",
-      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.9.tgz",
-      "integrity": "sha1-c9g7wmP4bpf4zE9rrhsOkKfSLIY=",
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
+      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
       "dev": true,
       "requires": {
-        "sprintf-js": "1.0.3"
+        "sprintf-js": "~1.0.2"
       }
     },
     "arr-diff": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-2.0.0.tgz",
-      "integrity": "sha1-jzuCf5Vai9ZpaX5KQlasPOrjVs8=",
-      "dev": true,
-      "requires": {
-        "arr-flatten": "1.1.0"
-      }
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-4.0.0.tgz",
+      "integrity": "sha1-1kYQdP6/7HHn4VI1dhoyml3HxSA=",
+      "dev": true
     },
     "arr-flatten": {
       "version": "1.1.0",
@@ -132,31 +140,16 @@
       "integrity": "sha512-L3hKV5R/p5o81R7O02IGnwpDmkp6E982XhtbuwSe3O4qOtMMMtodicASA1Cny2U+aCXcNpml+m4dPsvsJ3jatg==",
       "dev": true
     },
-    "array-union": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/array-union/-/array-union-1.0.2.tgz",
-      "integrity": "sha1-mjRBDk9OPaI96jdb5b5w8kd47Dk=",
-      "dev": true,
-      "requires": {
-        "array-uniq": "1.0.3"
-      }
-    },
-    "array-uniq": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/array-uniq/-/array-uniq-1.0.3.tgz",
-      "integrity": "sha1-r2rId6Jcx/dOBYiUdThY39sk/bY=",
+    "arr-union": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/arr-union/-/arr-union-3.1.0.tgz",
+      "integrity": "sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ=",
       "dev": true
     },
     "array-unique": {
-      "version": "0.2.1",
-      "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.2.1.tgz",
-      "integrity": "sha1-odl8yvy8JiXMcPrc6zalDFiwGlM=",
-      "dev": true
-    },
-    "arrify": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/arrify/-/arrify-1.0.1.tgz",
-      "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0=",
+      "version": "0.3.2",
+      "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.3.2.tgz",
+      "integrity": "sha1-qJS3XUvE9s1nnvMkSp/Y9Gri1Cg=",
       "dev": true
     },
     "asn1": {
@@ -174,9 +167,15 @@
       "optional": true
     },
     "assertion-error": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-1.0.2.tgz",
-      "integrity": "sha1-E8pRXYYgbaC6xm6DTdOX2HWBCUw=",
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-1.1.0.tgz",
+      "integrity": "sha512-jgsaNduz+ndvGyFt3uSuWqvy4lCnIJiovtouQN5JZHOKCS2QuhEdbcQHFhVksz2N2U9hXJo8odG7ETyWlEeuDw==",
+      "dev": true
+    },
+    "assign-symbols": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/assign-symbols/-/assign-symbols-1.0.0.tgz",
+      "integrity": "sha1-WWZ/QfrdTyDMvCu5a41Pf3jsA2c=",
       "dev": true
     },
     "async": {
@@ -187,9 +186,9 @@
       "optional": true
     },
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-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/async-each/-/async-each-1.0.1.tgz",
-      "integrity": "sha1-GdOGodntxufByF04iu28xW0zYC0=",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/async-each/-/async-each-1.0.3.tgz",
+      "integrity": "sha512-z/WhQ5FPySLdvREByI2vZiTWwCnF0moMJ1hK9YQwDTHKh6I7/uSckMetoRGb5UBZPC1z0jlw+n/XCgjeH7y1AQ==",
       "dev": true
     },
     "asynckit": {
@@ -198,6 +197,18 @@
       "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k=",
       "dev": true
     },
+    "atob": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/atob/-/atob-2.1.2.tgz",
+      "integrity": "sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg==",
+      "dev": true
+    },
+    "available-typed-arrays": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/available-typed-arrays/-/available-typed-arrays-1.0.5.tgz",
+      "integrity": "sha512-DMD0KiN46eipeziST1LPP/STfDU0sufISXmjSgvVsoU2tqxctQeASejWcfNtxYKqETM1UxQ8sp2OrSBWpHY6sw==",
+      "dev": true
+    },
     "aws-sign2": {
       "version": "0.5.0",
       "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.5.0.tgz",
@@ -206,33 +217,91 @@
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-      "integrity": "sha1-g+9cqGCysy5KDe7e6MdxudtXRx4=",
+      "version": "1.11.0",
+      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.11.0.tgz",
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-      "resolved": "https://registry.npmjs.org/babel-code-frame/-/babel-code-frame-6.22.0.tgz",
-      "integrity": "sha1-AnYgvuVnqIwyVhV05/0IAdMxGOQ=",
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-code-frame/-/babel-code-frame-6.26.0.tgz",
+      "integrity": "sha1-Y/1D99weO7fONZR9uP42mj9Yx0s=",
       "dev": true,
       "requires": {
-        "chalk": "1.1.3",
-        "esutils": "2.0.2",
-        "js-tokens": "3.0.2"
+        "chalk": "^1.1.3",
+        "esutils": "^2.0.2",
+        "js-tokens": "^3.0.2"
       }
     },
     "balanced-match": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
-      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
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       "dev": true
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+    "base": {
+      "version": "0.11.2",
+      "resolved": "https://registry.npmjs.org/base/-/base-0.11.2.tgz",
+      "integrity": "sha512-5T6P4xPgpp0YDFvSWwEZ4NoE3aM4QBQXDzmVbraCkFj8zHM+mba8SyqB5DbZWyR7mYHo6Y7BdQo3MoA4m0TeQg==",
+      "dev": true,
+      "requires": {
+        "cache-base": "^1.0.1",
+        "class-utils": "^0.3.5",
+        "component-emitter": "^1.2.1",
+        "define-property": "^1.0.0",
+        "isobject": "^3.0.1",
+        "mixin-deep": "^1.2.0",
+        "pascalcase": "^0.1.1"
+      },
+      "dependencies": {
+        "define-property": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/define-property/-/define-property-1.0.0.tgz",
+          "integrity": "sha1-dp66rz9KY6rTr56NMEybvnm/sOY=",
+          "dev": true,
+          "requires": {
+            "is-descriptor": "^1.0.0"
+          }
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+        "is-accessor-descriptor": {
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+          "resolved": "https://registry.npmjs.org/is-accessor-descriptor/-/is-accessor-descriptor-1.0.0.tgz",
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+          "dev": true,
+          "requires": {
+            "kind-of": "^6.0.0"
+          }
+        },
+        "is-data-descriptor": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/is-data-descriptor/-/is-data-descriptor-1.0.0.tgz",
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+          "dev": true,
+          "requires": {
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+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
+      "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA==",
       "dev": true
     },
+    "tough-cookie": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-4.0.0.tgz",
+      "integrity": "sha512-tHdtEpQCMrc1YLrMaqXXcj6AxhYi/xgit6mZu1+EDWUn+qhUf8wMQoFIy9NXuq23zAwtcB0t/MjACGR18pcRbg==",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "psl": "^1.1.33",
+        "punycode": "^2.1.1",
+        "universalify": "^0.1.2"
+      }
+    },
     "tunnel-agent": {
       "version": "0.4.3",
       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.4.3.tgz",
@@ -4104,8 +4175,13 @@
       "version": "0.14.5",
       "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
       "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
-      "dev": true,
-      "optional": true
+      "dev": true
+    },
+    "type": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/type/-/type-1.2.0.tgz",
+      "integrity": "sha512-+5nt5AAniqsCnu2cEQQdpzCAh33kVx8n0VoFidKpB1dVVLAN/F+bgVOqOJqOnEnrhp222clB5p3vUlD+1QAnfg==",
+      "dev": true
     },
     "type-check": {
       "version": "0.3.2",
@@ -4113,7 +4189,7 @@
       "integrity": "sha1-WITKtRLPHTVeP7eE8wgEsrUg23I=",
       "dev": true,
       "requires": {
-        "prelude-ls": "1.1.2"
+        "prelude-ls": "~1.1.2"
       }
     },
     "type-detect": {
@@ -4128,10 +4204,41 @@
       "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=",
       "dev": true
     },
+    "unbox-primitive": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/unbox-primitive/-/unbox-primitive-1.0.1.tgz",
+      "integrity": "sha512-tZU/3NqK3dA5gpE1KtyiJUrEB0lxnGkMFHptJ7q6ewdZ8s12QrODwNbhIJStmJkd1QDXa1NRA8aF2A1zk/Ypyw==",
+      "dev": true,
+      "requires": {
+        "function-bind": "^1.1.1",
+        "has-bigints": "^1.0.1",
+        "has-symbols": "^1.0.2",
+        "which-boxed-primitive": "^1.0.2"
+      }
+    },
+    "union-value": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.1.tgz",
+      "integrity": "sha512-tJfXmxMeWYnczCVs7XAEvIV7ieppALdyepWMkHkwciRpZraG/xwT+s2JN8+pr1+8jCRf80FFzvr+MpQeeoF4Xg==",
+      "dev": true,
+      "requires": {
+        "arr-union": "^3.1.0",
+        "get-value": "^2.0.6",
+        "is-extendable": "^0.1.1",
+        "set-value": "^2.0.1"
+      }
+    },
+    "universalify": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
+      "integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg==",
+      "dev": true,
+      "optional": true
+    },
     "unix-crypt-td-js": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/unix-crypt-td-js/-/unix-crypt-td-js-1.0.0.tgz",
-      "integrity": "sha1-HAgkFQSBvHoB1J6Y8exmjYJBLzs=",
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/unix-crypt-td-js/-/unix-crypt-td-js-1.1.4.tgz",
+      "integrity": "sha512-8rMeVYWSIyccIJscb9NdCfZKSRBKYTeVnwmiRYT2ulE3qd1RaDQ0xQDP+rI3ccIWbhu/zuo5cgN8z73belNZgw==",
       "dev": true
     },
     "unpipe": {
@@ -4140,30 +4247,94 @@
       "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw=",
       "dev": true
     },
+    "unset-value": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/unset-value/-/unset-value-1.0.0.tgz",
+      "integrity": "sha1-g3aHP30jNRef+x5vw6jtDfyKtVk=",
+      "dev": true,
+      "requires": {
+        "has-value": "^0.3.1",
+        "isobject": "^3.0.0"
+      },
+      "dependencies": {
+        "has-value": {
+          "version": "0.3.1",
+          "resolved": "https://registry.npmjs.org/has-value/-/has-value-0.3.1.tgz",
+          "integrity": "sha1-ex9YutpiyoJ+wKIHgCVlSEWZXh8=",
+          "dev": true,
+          "requires": {
+            "get-value": "^2.0.3",
+            "has-values": "^0.1.4",
+            "isobject": "^2.0.0"
+          },
+          "dependencies": {
+            "isobject": {
+              "version": "2.1.0",
+              "resolved": "https://registry.npmjs.org/isobject/-/isobject-2.1.0.tgz",
+              "integrity": "sha1-8GVWEJaj8dou9GJy+BXIQNh+DIk=",
+              "dev": true,
+              "requires": {
+                "isarray": "1.0.0"
+              }
+            }
+          }
+        },
+        "has-values": {
+          "version": "0.1.4",
+          "resolved": "https://registry.npmjs.org/has-values/-/has-values-0.1.4.tgz",
+          "integrity": "sha1-bWHeldkd/Km5oCCJrThL/49it3E=",
+          "dev": true
+        }
+      }
+    },
+    "upath": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/upath/-/upath-1.2.0.tgz",
+      "integrity": "sha512-aZwGpamFO61g3OlfT7OQCHqhGnW43ieH9WZeP7QxN/G/jS4jfqUkZxoryvJgVPEcrl5NL/ggHsSmLMHuH64Lhg==",
+      "dev": true
+    },
+    "uri-js": {
+      "version": "4.4.1",
+      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.1.tgz",
+      "integrity": "sha512-7rKUyy33Q1yc98pQ1DAmLtwX109F7TIfWlW1Ydo8Wl1ii1SeHieeh0HHfPeL2fMXK6z0s8ecKs9frCuLJvndBg==",
+      "dev": true,
+      "requires": {
+        "punycode": "^2.1.0"
+      }
+    },
+    "urix": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/urix/-/urix-0.1.0.tgz",
+      "integrity": "sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI=",
+      "dev": true
+    },
+    "use": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/use/-/use-3.1.1.tgz",
+      "integrity": "sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==",
+      "dev": true
+    },
     "user-home": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/user-home/-/user-home-2.0.0.tgz",
       "integrity": "sha1-nHC/2Babwdy/SGBODwS4tJzenp8=",
       "dev": true,
       "requires": {
-        "os-homedir": "1.0.2"
+        "os-homedir": "^1.0.0"
       }
     },
     "util": {
-      "version": "0.10.3",
-      "resolved": "https://registry.npmjs.org/util/-/util-0.10.3.tgz",
-      "integrity": "sha1-evsa/lCAUkZInj23/g7TeTNqwPk=",
+      "version": "0.12.4",
+      "resolved": "https://registry.npmjs.org/util/-/util-0.12.4.tgz",
+      "integrity": "sha512-bxZ9qtSlGUWSOy9Qa9Xgk11kSslpuZwaxCg4sNIDj6FLucDab2JxnHwyNTCpHMtK1MjoQiWQ6DiUMZYbSrO+Sw==",
       "dev": true,
       "requires": {
-        "inherits": "2.0.1"
-      },
-      "dependencies": {
-        "inherits": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz",
-          "integrity": "sha1-sX0I0ya0Qj5Wjv9xn5GwscvfafE=",
-          "dev": true
-        }
+        "inherits": "^2.0.3",
+        "is-arguments": "^1.0.4",
+        "is-generator-function": "^1.0.7",
+        "is-typed-array": "^1.1.3",
+        "safe-buffer": "^5.1.2",
+        "which-typed-array": "^1.1.2"
       }
     },
     "util-deprecate": {
@@ -4173,21 +4344,21 @@
       "dev": true
     },
     "utils-merge": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.0.tgz",
-      "integrity": "sha1-ApT7kiu5N1FTVBxPcJYjHyh8ivg=",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=",
       "dev": true
     },
     "uuid": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.1.0.tgz",
-      "integrity": "sha512-DIWtzUkw04M4k3bf1IcpS2tngXEL26YUD2M0tMDUpnUrz2hgzUBlD55a4FjdLGPvfHxS6uluGWvaVEqgBcVa+g==",
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
+      "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==",
       "dev": true
     },
     "vary": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.1.tgz",
-      "integrity": "sha1-Z1Neu2lMHVIldFeYRmUyP1h+jTc=",
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=",
       "dev": true
     },
     "verror": {
@@ -4196,9 +4367,9 @@
       "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
       "dev": true,
       "requires": {
-        "assert-plus": "1.0.0",
+        "assert-plus": "^1.0.0",
         "core-util-is": "1.0.2",
-        "extsprintf": "1.3.0"
+        "extsprintf": "^1.2.0"
       },
       "dependencies": {
         "assert-plus": {
@@ -4206,22 +4377,30 @@
           "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
           "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
           "dev": true
+        },
+        "core-util-is": {
+          "version": "1.0.2",
+          "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
+          "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=",
+          "dev": true
         }
       }
     },
     "websocket-driver": {
-      "version": "0.6.5",
-      "resolved": "https://registry.npmjs.org/websocket-driver/-/websocket-driver-0.6.5.tgz",
-      "integrity": "sha1-XLJVbOuF9Dc8bYI4qmkchFThOjY=",
+      "version": "0.7.4",
+      "resolved": "https://registry.npmjs.org/websocket-driver/-/websocket-driver-0.7.4.tgz",
+      "integrity": "sha512-b17KeDIQVjvb0ssuSDF2cYXSg2iztliJ4B9WdsuB6J952qCPKmnVq4DyW5motImXHDC1cBT/1UezrJVsKw5zjg==",
       "dev": true,
       "requires": {
-        "websocket-extensions": "0.1.1"
+        "http-parser-js": ">=0.5.1",
+        "safe-buffer": ">=5.1.0",
+        "websocket-extensions": ">=0.1.1"
       }
     },
     "websocket-extensions": {
-      "version": "0.1.1",
-      "resolved": "https://registry.npmjs.org/websocket-extensions/-/websocket-extensions-0.1.1.tgz",
-      "integrity": "sha1-domUmcGEtu91Q3fC27DNbLVdKec=",
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/websocket-extensions/-/websocket-extensions-0.1.4.tgz",
+      "integrity": "sha512-OqedPIGOfsDlo31UNwYbCFMSaO9m9G/0faIHj5/dZFDMFqPTcx6UwqyOy3COEaEOg/9VsGIpdqn62W5KhoKSpg==",
       "dev": true
     },
     "which": {
@@ -4230,10 +4409,37 @@
       "integrity": "sha1-RgwdoPgQED0DIam2M6+eV15kSG8=",
       "dev": true
     },
-    "wordwrap": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",
-      "integrity": "sha1-J1hIEIkUVqQXHI0CJkQa3pDLyus=",
+    "which-boxed-primitive": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/which-boxed-primitive/-/which-boxed-primitive-1.0.2.tgz",
+      "integrity": "sha512-bwZdv0AKLpplFY2KZRX6TvyuN7ojjr7lwkg6ml0roIy9YeuSr7JS372qlNW18UQYzgYK9ziGcerWqZOmEn9VNg==",
+      "dev": true,
+      "requires": {
+        "is-bigint": "^1.0.1",
+        "is-boolean-object": "^1.1.0",
+        "is-number-object": "^1.0.4",
+        "is-string": "^1.0.5",
+        "is-symbol": "^1.0.3"
+      }
+    },
+    "which-typed-array": {
+      "version": "1.1.7",
+      "resolved": "https://registry.npmjs.org/which-typed-array/-/which-typed-array-1.1.7.tgz",
+      "integrity": "sha512-vjxaB4nfDqwKI0ws7wZpxIlde1XrLX5uB0ZjpfshgmapJMD7jJWhZI+yToJTqaFByF0eNBcYxbjmCzoRP7CfEw==",
+      "dev": true,
+      "requires": {
+        "available-typed-arrays": "^1.0.5",
+        "call-bind": "^1.0.2",
+        "es-abstract": "^1.18.5",
+        "foreach": "^2.0.5",
+        "has-tostringtag": "^1.0.0",
+        "is-typed-array": "^1.1.7"
+      }
+    },
+    "word-wrap": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
+      "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==",
       "dev": true
     },
     "wrappy": {
@@ -4248,22 +4454,23 @@
       "integrity": "sha1-X8A4KOJkzqP+kUVUdvejxWbLB1c=",
       "dev": true,
       "requires": {
-        "mkdirp": "0.5.1"
+        "mkdirp": "^0.5.1"
       }
     },
     "xtend": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
-      "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68=",
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
       "dev": true
     },
     "yauzl": {
-      "version": "2.4.1",
-      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.4.1.tgz",
-      "integrity": "sha1-lSj0QtqxsihOWLQ3m7GU4i4MQAU=",
+      "version": "2.10.0",
+      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
+      "integrity": "sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=",
       "dev": true,
       "requires": {
-        "fd-slicer": "1.0.1"
+        "buffer-crc32": "~0.2.3",
+        "fd-slicer": "~1.1.0"
       }
     }
   }
diff --git a/package.json b/package.json
index 3ca8216..6275920 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,8 @@
   "license": "MIT",
   "scripts": {
     "test": "mocha-phantomjs -p ./node_modules/.bin/phantomjs test/index.html",
-    "start": "live-server --open=./dev"
+    "start": "live-server --open=./dev",
+    "lint": "eslint ."
   },
   "peerDependencies": {
     "leaflet": ">= 0.7.7 < 2",
diff --git a/src/leaflet.filelayer.js b/src/leaflet.filelayer.js
index c164ffa..5326867 100644
--- a/src/leaflet.filelayer.js
+++ b/src/leaflet.filelayer.js
@@ -20,15 +20,19 @@
         module.exports = function (root, L, toGeoJSON) {
             if (L === undefined) {
                 if (typeof window !== 'undefined') {
+                    // eslint-disable-next-line global-require
                     L = require('leaflet');
                 } else {
+                    // eslint-disable-next-line global-require
                     L = require('leaflet')(root);
                 }
             }
             if (toGeoJSON === undefined) {
                 if (typeof window !== 'undefined') {
+                    // eslint-disable-next-line global-require
                     toGeoJSON = require('togeojson');
                 } else {
+                    // eslint-disable-next-line global-require
                     toGeoJSON = require('togeojson')(root);
                 }
             }
@@ -59,8 +63,8 @@
         },
 
         load: function (file, ext) {
-            var parser,
-                reader;
+            var parser;
+            var reader;
 
             // Check file is defined
             if (this._isParameterMissing(file, 'file')) {
@@ -107,10 +111,10 @@
         loadMultiple: function (files, ext) {
             var readers = [];
             if (files[0]) {
-              files = Array.prototype.slice.apply(files);
-              while (files.length > 0) {
-                readers.push(this.load(files.shift(), ext));
-              }
+                files = Array.prototype.slice.apply(files);
+                while (files.length > 0) {
+                    readers.push(this.load(files.shift(), ext));
+                }
             }
             // return first reader (or false if no file),
             // which is also used for subsequent loadings
diff --git a/test/test.filelayer.js b/test/test.filelayer.js
index 16a053f..1f81b0a 100644
--- a/test/test.filelayer.js
+++ b/test/test.filelayer.js
@@ -1,378 +1,387 @@
 var assert = chai.assert;
+
 var _VALID_GEOJSON = {
-    type: "FeatureCollection",
+    type: 'FeatureCollection',
     features: [
-        { type: "Point", coordinates: [0, 0] }
+        { type: 'Point', coordinates: [0, 0] }
     ]
 };
+// eslint-disable-next-line max-len
 var _VALID_KML = '<kml><Placemark><Point><coordinates>0,0,0</coordinates></Point></Placemark></kml>';
-console.log(sinon);
-
-describe('L.Control.FileLayerLoad', function() {
 
+describe('L.Control.FileLayerLoad', function () {
     var map;
 
-    beforeEach(function() {
+    beforeEach(function () {
         map = L.map('map').fitWorld();
     });
 
-    afterEach(function() {
+    afterEach(function () {
         map.remove();
     });
 
-    describe('Initialization', function() {
-
-        it("should listen to click once added.", function(done) {
+    describe('Initialization', function () {
+        it('should listen to click once added.', function (done) {
+            var fileinput;
+            var callback;
+            var button;
             L.Control.fileLayerLoad().addTo(map);
 
-            var fileinput = document.querySelector('input.hidden');
-            var callback = sinon.spy();
+            fileinput = document.querySelector('input.hidden');
+            callback = sinon.spy();
             L.DomEvent.on(fileinput, 'click', callback);
 
-            var button = document.querySelector('a.leaflet-control-filelayer');
+            button = document.querySelector('a.leaflet-control-filelayer');
             happen.click(button);
             assert.isTrue(callback.called);
 
             done();
         });
 
-        it("should be able to load several files", function(done) {
-            var control = L.Control.fileLayerLoad().addTo(map);
+        it('should be able to load several files', function (done) {
+            var fileinput;
+            L.Control.fileLayerLoad().addTo(map);
 
-            var fileinput = document.querySelector('input.hidden');
+            fileinput = document.querySelector('input.hidden');
             assert.isTrue(fileinput.multiple);
 
             done();
         });
-
     });
 
 
-    describe('Map layers', function() {
-
-        it("should add the layer to the map by default", function(done) {
+    describe('Map layers', function () {
+        it('should add the layer to the map by default', function (done) {
             var control = L.Control.fileLayerLoad().addTo(map);
 
             var callback = sinon.spy();
+            var reader;
             map.on('layeradd', callback);
-            var reader = control.loader.load({name: 'name.geojson', testing: true});
-            reader.onload({target: {result: _VALID_GEOJSON}});
+            reader = control.loader.load({ name: 'name.geojson', testing: true });
+            reader.onload({ target: { result: _VALID_GEOJSON } });
 
             assert.isTrue(callback.called);
             done();
         });
 
-        it("should not add the layer if `addToMap` is false", function(done) {
-            var control = L.Control.fileLayerLoad({addToMap: false}).addTo(map);
+        it('should not add the layer if `addToMap` is false', function (done) {
+            var control = L.Control.fileLayerLoad({ addToMap: false }).addTo(map);
 
             var callback = sinon.spy();
+            var reader;
             map.on('layeradd', callback);
 
-            var reader = control.loader.load({name: 'name.geojson', testing: true});
-            reader.onload({target: {result: _VALID_GEOJSON}});
+            reader = control.loader.load({ name: 'name.geojson', testing: true });
+            reader.onload({ target: { result: _VALID_GEOJSON } });
 
             assert.isFalse(callback.called);
             done();
         });
-
-
     });
-
 });
 
-describe('FileLoader', function() {
-
-    var map,
-        loader;
+describe('FileLoader', function () {
+    var map;
+    var loader;
 
-    before(function() {
+    before(function () {
         map = L.map('map').fitWorld();
         loader = new L.FileLayer.FileLoader(map);
     });
 
-    after(function() {
+    after(function () {
         map.remove();
     });
 
-    describe('Load file', function() {
-
-        beforeEach(function() {
+    describe('Load file', function () {
+        beforeEach(function () {
             loader.removeEventListener('data:loading');
             loader.removeEventListener('data:loaded');
             loader.removeEventListener('data:error');
         });
 
-        it("should warn if format is not supported.", function(done) {
-            var file = {name: 'name.csv', testing: true},
-                callback = sinon.spy();
+        it('should warn if format is not supported.', function (done) {
+            var file = { name: 'name.csv', testing: true };
+            var callback = sinon.spy();
             loader.on('data:error', callback);
             loader.load(file);
             assert.isTrue(callback.calledOnce);
             done();
         });
 
-        it("should fire data:loading and data:loaded", function(done) {
-            var file = {name: 'name.geojson', testing: true};
-            var loadingcb = sinon.spy(),
-                loadedcb = sinon.spy();
+        it('should fire data:loading and data:loaded', function (done) {
+            var file = { name: 'name.geojson', testing: true };
+            var loadingcb = sinon.spy();
+            var loadedcb = sinon.spy();
+            var reader;
             loader.on('data:loading', loadingcb);
             loader.on('data:loaded', loadedcb);
-            var reader = loader.load(file);
-            reader.onload({target: {result: _VALID_GEOJSON}});
+            reader = loader.load(file);
+            reader.onload({ target: { result: _VALID_GEOJSON } });
             assert.isTrue(loadingcb.called);
             assert.isTrue(loadedcb.called);
             done();
         });
 
-        it("should be able to load KML", function(done) {
-            var file = {name: 'name.kml', testing: true};
+        it('should be able to load KML', function (done) {
+            var file = { name: 'name.kml', testing: true };
+            var reader;
             loader.on('data:loaded', function (e) {
                 assert.equal(e.format, 'kml');
                 assert.equal(e.filename, 'name.kml');
                 assert.isTrue(e.layer instanceof L.GeoJSON);
                 done();
             });
-            var reader = loader.load(file);
-            reader.onload({target: {result: _VALID_KML}});
+            reader = loader.load(file);
+            reader.onload({ target: { result: _VALID_KML } });
         });
 
-        it("should reject KML if GPX expected", function(done) {
-            var file = {name: 'name.kml', testing: true},
-                ext = "gpx",
-                cberr = sinon.spy(),
-                cbok = sinon.spy();
+        it('should reject KML if GPX expected', function (done) {
+            var file = { name: 'name.kml', testing: true };
+            var ext = 'gpx';
+            var cberr = sinon.spy();
+            var cbok = sinon.spy();
+            var reader;
             loader.on('data:error', cberr);
             loader.on('data:loaded', cbok);
-            var reader = loader.load(file, ext);
-            reader.onload({target: {result: _VALID_KML}});
+            reader = loader.load(file, ext);
+            reader.onload({ target: { result: _VALID_KML } });
             assert.isTrue(cberr.called);
             assert.isFalse(cbok.called);
             done();
         });
 
-        it("should be able to load KML with gpx extension", function(done) {
-            var file = {name: 'name.gpx', testing: true},
-                ext = "kml",
-                cberr = sinon.spy();
-            loader.on('data:error', cberr);;
+        it('should be able to load KML with gpx extension', function (done) {
+            var file = { name: 'name.gpx', testing: true };
+            var ext = 'kml';
+            var cberr = sinon.spy();
+            var reader;
+            loader.on('data:error', cberr);
             loader.on('data:loaded', function (e) {
                 assert.equal(e.format, 'kml');
                 assert.equal(e.filename, 'name.gpx');
                 assert.isTrue(e.layer instanceof L.GeoJSON);
                 done();
             });
-            var reader = loader.load(file, ext);
-            reader.onload({target: {result: _VALID_KML}});
+            reader = loader.load(file, ext);
+            reader.onload({ target: { result: _VALID_KML } });
             assert.isFalse(cberr.called);
         });
 
-        it("should warn if size exceeds limit from option", function(done) {
-            var file = {name: 'name.kml', size: 9999999, testing: true},
-                callback = sinon.spy();
+        it('should warn if size exceeds limit from option', function (done) {
+            var file = { name: 'name.kml', size: 9999999, testing: true };
+            var callback = sinon.spy();
             loader.on('data:error', callback);
             loader.load(file);
             assert.isTrue(callback.calledOnce);
             done();
         });
 
-        it("should warn if imported layer has no feature", function(done) {
-            var file = {name: 'name.geojson', testing: true},
-                callback = sinon.spy();
+        it('should warn if imported layer has no feature', function (done) {
+            var file = { name: 'name.geojson', testing: true };
+            var callback = sinon.spy();
+            var reader;
             loader.on('data:error', callback);
-            var reader = loader.load(file);
-            reader.onload({target: {result: {}}});
+            reader = loader.load(file);
+            reader.onload({ target: { result: {} } });
             assert.isTrue(callback.called);
             done();
         });
     });
 
-    describe('Load multiple files', function() {
-
-        beforeEach(function() {
+    describe('Load multiple files', function () {
+        beforeEach(function () {
             loader.removeEventListener('data:loading');
             loader.removeEventListener('data:loaded');
             loader.removeEventListener('data:error');
         });
 
-        it("should warn if format is not supported.", function(done) {
+        it('should warn if format is not supported.', function (done) {
             var files = [
-                  {name: 'name1.csv', testing: true},
-                  {name: 'name2.csv', testing: true}
-                ],
-                callback = sinon.spy();
+                { name: 'name1.csv', testing: true },
+                { name: 'name2.csv', testing: true }
+            ];
+            var callback = sinon.spy();
             loader.on('data:error', callback);
             loader.loadMultiple(files);
             assert.isTrue(callback.calledTwice);
             done();
         });
 
-        it("should fire data:loading and data:loaded", function(done) {
+        it('should fire data:loading and data:loaded', function (done) {
             var files = [
-                {name: 'name1.geojson', testing: true},
-                {name: 'name2.geojson', testing: true}
-              ],
-              loadingcb = sinon.spy(),
-              loadedcb = sinon.spy();
+                { name: 'name1.geojson', testing: true },
+                { name: 'name2.geojson', testing: true }
+            ];
+            var loadingcb = sinon.spy();
+            var loadedcb = sinon.spy();
+            var readers;
             loader.on('data:loading', loadingcb);
             loader.on('data:loaded', loadedcb);
-            var readers = loader.loadMultiple(files);
-            readers[0].onload({target: {result: _VALID_GEOJSON}});
-            readers[1].onload({target: {result: _VALID_GEOJSON}});
+            readers = loader.loadMultiple(files);
+            readers[0].onload({ target: { result: _VALID_GEOJSON } });
+            readers[1].onload({ target: { result: _VALID_GEOJSON } });
             assert.isTrue(loadingcb.calledTwice);
             assert.isTrue(loadedcb.calledTwice);
             done();
         });
 
-        it("can load different types of files together", function(done) {
+        it('can load different types of files together', function (done) {
             var files = [
-                {name: 'name1.geojson', testing: true},
-                {name: 'name2.kml', testing: true}
-              ],
-              count = 0;
-            loader.on('data:loaded', function(e){
-              var json, kml;
-              json = (e.filename == 'name1.geojson') && (e.format == 'geojson')
-              kml = (e.filename == 'name2.kml') && (e.format == 'kml')
-              assert.isTrue(json || kml);
-              if (++count == 2) {
-                done();
-              };
+                { name: 'name1.geojson', testing: true },
+                { name: 'name2.kml', testing: true }
+            ];
+            var count = 0;
+            var readers;
+            loader.on('data:loaded', function (e) {
+                var json;
+                var kml;
+                json = (e.filename === 'name1.geojson') && (e.format === 'geojson');
+                kml = (e.filename === 'name2.kml') && (e.format === 'kml');
+                assert.isTrue(json || kml);
+                if (++count === 2) {
+                    done();
+                }
             });
-            var readers = loader.loadMultiple(files);
-            readers[0].onload({target: {result: _VALID_GEOJSON}});
-            readers[1].onload({target: {result: _VALID_KML}});
+            readers = loader.loadMultiple(files);
+            readers[0].onload({ target: { result: _VALID_GEOJSON } });
+            readers[1].onload({ target: { result: _VALID_KML } });
         });
 
-        it("should be able to load a single KML file", function(done) {
+        it('should be able to load a single KML file', function (done) {
             var files = [
-                {name: 'name2.kml', testing: true}
-              ];
+                { name: 'name2.kml', testing: true }
+            ];
+            var readers;
             loader.on('data:loaded', function (e) {
                 assert.equal(e.format, 'kml');
                 assert.isTrue(/name[12]\.kml/.test(e.filename));
                 assert.isTrue(e.layer instanceof L.GeoJSON);
                 done();
             });
-            var readers = loader.loadMultiple(files);
-            readers[0].onload({target: {result: _VALID_KML}});
+            readers = loader.loadMultiple(files);
+            readers[0].onload({ target: { result: _VALID_KML } });
         });
 
-        it("should reject KML if geojson expected", function(done) {
+        it('should reject KML if geojson expected', function (done) {
             var files = [
-                  {name: 'name1.kml', testing: true},
-                  {name: 'name2.geojson', testing: true}
-                ],
-                ext = "geojson",
-                cberr = sinon.spy(),
-                cbok = sinon.spy();
+                { name: 'name1.kml', testing: true },
+                { name: 'name2.geojson', testing: true }
+            ];
+            var ext = 'geojson';
+            var cberr = sinon.spy();
+            var cbok = sinon.spy();
+            var readers;
             loader.on('data:error', cberr);
             loader.on('data:loaded', cbok);
-            var readers = loader.loadMultiple(files, ext);
-            readers[0].onload({target: {result: _VALID_KML}});
-            readers[1].onload({target: {result: _VALID_GEOJSON}});
+            readers = loader.loadMultiple(files, ext);
+            readers[0].onload({ target: { result: _VALID_KML } });
+            readers[1].onload({ target: { result: _VALID_GEOJSON } });
             assert.isTrue(cberr.calledOnce);
             assert.isTrue(cbok.calledOnce);
             done();
         });
 
-        it("should be able to load KML with invalid extension", function(done) {
+        it('should be able to load KML with invalid extension', function (done) {
             var files = [
-                  {name: 'name1.gpx', testing: true},
-                  {name: 'name2.txt', testing: true}
-                ],
-                ext = "kml",
-                cberr = sinon.spy(),
-                cbloaded = sinon.spy();
-            loader.on('data:error', cberr);;
+                { name: 'name1.gpx', testing: true },
+                { name: 'name2.txt', testing: true }
+            ];
+            var ext = 'kml';
+            var cberr = sinon.spy();
+            var cbloaded = sinon.spy();
+            var readers;
+            loader.on('data:error', cberr);
             loader.on('data:loaded', function (e) {
                 assert.equal(e.format, 'kml');
                 assert.isTrue(/name[12]\.(gpx|txt)/.test(e.filename));
                 assert.isTrue(e.layer instanceof L.GeoJSON);
                 cbloaded();
             });
-            var readers = loader.loadMultiple(files, ext);
-            readers[0].onload({target: {result: _VALID_KML}});
-            readers[1].onload({target: {result: _VALID_KML}});
+            readers = loader.loadMultiple(files, ext);
+            readers[0].onload({ target: { result: _VALID_KML } });
+            readers[1].onload({ target: { result: _VALID_KML } });
             assert.isFalse(cberr.called);
             assert.isTrue(cbloaded.calledTwice);
             done();
         });
 
-        it("should warn if size exceeds limit from option", function(done) {
+        it('should warn if size exceeds limit from option', function (done) {
             var files = [
-                  {name: 'name1.kml', size: 9999999, testing: true},
-                  {name: 'name2.kml', testing: true}
-                ],
-                callback = sinon.spy();
+                { name: 'name1.kml', size: 9999999, testing: true },
+                { name: 'name2.kml', testing: true }
+            ];
+            var callback = sinon.spy();
             loader.on('data:error', callback);
             loader.loadMultiple(files);
             assert.isTrue(callback.calledOnce);
             done();
         });
 
-        it("should warn if imported layer has no feature", function(done) {
+        it('should warn if imported layer has no feature', function (done) {
             var files = [
-                  {name: 'name1.geojson', testing: true},
-                  {name: 'name2.geojson', testing: true}
-                ],
-                cberr = sinon.spy(),
-                cbloaded = sinon.spy();
+                { name: 'name1.geojson', testing: true },
+                { name: 'name2.geojson', testing: true }
+            ];
+            var cberr = sinon.spy();
+            var cbloaded = sinon.spy();
+            var readers;
             loader.on('data:error', cberr);
             loader.on('data:loaded', cbloaded);
-            var readers = loader.loadMultiple(files);
-            readers[0].onload({target: {result: _VALID_GEOJSON}});
-            readers[1].onload({target: {result: {}}});
+            readers = loader.loadMultiple(files);
+            readers[0].onload({ target: { result: _VALID_GEOJSON } });
+            readers[1].onload({ target: { result: {} } });
             assert.isTrue(cberr.calledOnce);
             assert.isTrue(cbloaded.calledOnce);
             done();
         });
 
-        it("should silently ignore empty files list", function(done) {
-            var files = [],
-                callback = sinon.spy();
+        it('should silently ignore empty files list', function (done) {
+            var files = [];
+            var callback = sinon.spy();
+            var readers;
             loader.on('data:error', callback);
             loader.on('data:loaded', callback);
-            var readers = loader.loadMultiple(files);
-            assert.isTrue(readers.length == 0);
+            readers = loader.loadMultiple(files);
+            assert.isTrue(readers.length === 0);
             assert.isFalse(callback.called);
             done();
         });
     });
 
-    describe('Load data', function() {
-
-        beforeEach(function() {
+    describe('Load data', function () {
+        beforeEach(function () {
             loader.removeEventListener('data:loading');
             loader.removeEventListener('data:loaded');
             loader.removeEventListener('data:error');
         });
 
-        it("should warn if format is not supported.", function(done) {
-            var name = 'name.csv',
-                data = '';
-                callback = sinon.spy();
+        it('should warn if format is not supported.', function (done) {
+            var name = 'name.csv';
+            var data = '';
+            var callback = sinon.spy();
             loader.on('data:error', callback);
             loader.loadData(data, name);
             assert.isTrue(callback.calledOnce);
             done();
         });
 
-        it("should fire data:loading and data:loaded", function(done) {
-            var name = 'name.geojson',
-                data = _VALID_GEOJSON;
-            var loadingcb = sinon.spy(),
-                loadedcb = sinon.spy();
+        it('should fire data:loading and data:loaded', function (done) {
+            var name = 'name.geojson';
+            var data = _VALID_GEOJSON;
+            var loadingcb = sinon.spy();
+            var loadedcb = sinon.spy();
             loader.on('data:loading', loadingcb);
             loader.on('data:loaded', loadedcb);
-            var reader = loader.loadData(data, name);
+            loader.loadData(data, name);
             assert.isTrue(loadingcb.called);
             assert.isTrue(loadedcb.called);
             done();
         });
 
-        it("should be able to load KML", function(done) {
-            var name = 'name.kml',
-                data = _VALID_KML;
+        it('should be able to load KML', function (done) {
+            var name = 'name.kml';
+            var data = _VALID_KML;
             loader.on('data:loaded', function (e) {
                 assert.equal(e.format, 'kml');
                 assert.equal(e.filename, 'name.kml');
@@ -382,12 +391,12 @@ describe('FileLoader', function() {
             loader.loadData(data, name);
         });
 
-        it("should reject KML if GPX expected", function(done) {
-            var name = 'name.kml',
-                data = _VALID_KML,
-                ext = "gpx",
-                cberr = sinon.spy(),
-                cbok = sinon.spy();
+        it('should reject KML if GPX expected', function (done) {
+            var name = 'name.kml';
+            var data = _VALID_KML;
+            var ext = 'gpx';
+            var cberr = sinon.spy();
+            var cbok = sinon.spy();
             loader.on('data:error', cberr);
             loader.on('data:loaded', cbok);
             loader.loadData(data, name, ext);
@@ -396,11 +405,11 @@ describe('FileLoader', function() {
             done();
         });
 
-        it("should be able to load KML with gpx extension", function(done) {
-            var name = 'name.gpx',
-                data = _VALID_KML,
-                ext = "kml",
-                cberr = sinon.spy();
+        it('should be able to load KML with gpx extension', function (done) {
+            var name = 'name.gpx';
+            var data = _VALID_KML;
+            var ext = 'kml';
+            var cberr = sinon.spy();
             loader.on('data:error', cberr);
             loader.on('data:loaded', function (e) {
                 assert.equal(e.format, 'kml');
@@ -412,12 +421,13 @@ describe('FileLoader', function() {
             assert.isFalse(cberr.called);
         });
 
-        it("should warn if size exceeds limit from option", function(done) {
-            var name = 'name.kml',
-                data  = '',
-                callback = sinon.spy();
-            for (var i = 0 ; i < 1030 ; i++) {
-              data += '0';
+        it('should warn if size exceeds limit from option', function (done) {
+            var name = 'name.kml';
+            var data = '';
+            var callback = sinon.spy();
+            var i;
+            for (i = 0; i < 1030; i++) {
+                data += '0';
             }
             loader.on('data:error', callback);
             loader.loadData(data, name);
@@ -425,17 +435,14 @@ describe('FileLoader', function() {
             done();
         });
 
-        it("should warn if imported layer has no feature", function(done) {
-            var name = 'name.geojson',
-                data = {},
-                callback = sinon.spy();
+        it('should warn if imported layer has no feature', function (done) {
+            var name = 'name.geojson';
+            var data = {};
+            var callback = sinon.spy();
             loader.on('data:error', callback);
             loader.loadData(data, name);
             assert.isTrue(callback.called);
             done();
         });
-
     });
-
-
 });