KerasJS is not defined

Hi pretty straight forward install but when I run my app (I tried both in Ionic and React Native) I get the same issue:

This was the Error log in Ionic but really hope to have it installed in React Native... Thanks!

Error: Uncaught (in promise): ReferenceError: KerasJS is not defined
ReferenceError: KerasJS is not defined
at Object. (http://localhost:8100/build/vendor.js:119289:30530)
at Object. (http://localhost:8100/build/vendor.js:119292:30)
at webpack_require (http://localhost:8100/build/vendor.js:55:30)
at new HomePage (http://localhost:8100/build/main.js:59:19)
at createClass (http://localhost:8100/build/vendor.js:12517:20)
at createDirectiveInstance (http://localhost:8100/build/vendor.js:12364:37)
at createViewNodes (http://localhost:8100/build/vendor.js:13802:53)
at createRootView (http://localhost:8100/build/vendor.js:13692:5)
at callWithDebugContext (http://localhost:8100/build/vendor.js:15093:42)
at Object.debugCreateRootView [as createRootView] (http://localhost:8100/build/vendor.js:14394:12)
at c (http://localhost:8100/build/polyfills.js:3:19752)
at Object.reject (http://localhost:8100/build/polyfills.js:3:19174)
at NavControllerBase._fireError (http://localhost:8100/build/vendor.js:48075:16)
at NavControllerBase._failed (http://localhost:8100/build/vendor.js:48068:14)
at http://localhost:8100/build/vendor.js:48115:59
at t.invoke (http://localhost:8100/build/polyfills.js:3:14976)
at Object.onInvoke (http://localhost:8100/build/vendor.js:4982:33)
at t.invoke (http://localhost:8100/build/polyfills.js:3:14916)
at r.run (http://localhost:8100/build/polyfills.js:3:10143)
at http://localhost:8100/build/polyfills.js:3:20242

[anandanand84]

You need keras-js for pattern detection. It is a dependency mentioned in package.json

https://github.com/anandanand84/technicalindicators/blob/master/package.json#L115 Not sure why whatever the build tools you use didnt pull that dependency.

https://github.com/transcranial/keras-js

It did install the Keras-js dependency and I even checked it was there in my node_modules... I also installed it via NPM to make sure too but still showing that error... Any idea for a fix?

[anandanand84]

make sure kerasjs is loaded before the technicalindicators library and KerasJS should be global

I managed to get it to load correctly and now the only issue within React Native that is this error regarding Node Standard Library.. Which appears to be a KerasJS error. I'll post this issue there but wanted to share it with you because this would be killer to work in RN. Thanks for your help.

The package at "...\node_modules\keras-js\lib\Model.js" attempted to import the Node standard library module "fs". It failed because React Native does not include the Node standard library. Read more at https://docs.expo.io/versions/latest/introduction/faq.html#can-i-use-nodejs-packages-with-expo

[anandanand84]

For now if you dont require pattern detection, you can use npm install --save-exact technicalindicators@1.0.19 which doesnt have keras js dependancy

Okay I'll give that a try. Would I still be able to use Bullish & Bearish indicators? Thanks!

[anandanand84]

yes you will still be able to use bearish and bullish but not head and shoulders, double bottom and so on.

i switched to React web so i can use Keras JS and now it is telling me when I call const bullish = require('technicalindicators').bullish; in my constructor that it is an undefined function? Any thoughts? Thanks!

[anandanand84]

It seems there is some problem with the build configuration when using react, did you try using vanilla javascript, It is very difficult for me help unless you create a simple minimalist project which shows the error which I can debug to help you.

Haven't tried Vanilla JS, I understand so I created this demo that emulates my problem with whats happening. Thank you very much for your help!

https://github.com/pereless360/CoinIndicators

[dawadam]

Hi,
Same problem with Vue JS (Vue-CLI & webpack template).
Just when importing technicalindicators.

import technicalindicators from 'technicalindicators'

And when using version 1.0.19, error is :
ReferenceError: regeneratorRuntime is not defined

Were you able to take a look at this to see why the indicator functions were returning as undefined? https://github.com/pereless360/CoinIndicators ... Many Thanks

[anandanand84]

I did look at it a little bit but could not figure out, I would suggest to just to use vanilla javscript by adding the following to the index.html

<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-polyfill/6.23.0/polyfill.min.js"></script>
<script src="https://cdn.rawgit.com/transcranial/keras-js/master/dist/keras.min.js"></script>
<script src="dist/browser.js"></script>

May be if I get time I'll add those to your repo tomorrow.

I think I got it working! Minus a few errors in the console, I am able to run it now and test successfully with your examples... However does this work with historical decimal numbers under 1.0 (for ex: .0000323)? I am trying to run this cryptocurrency prices in BTC value and am getting odd results. Maybe there is a specific period for each indicator? Some clarity would be appreciated. Thanks!

[anandanand84]

yes it should work with lower values.