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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,44 +1,48 @@ | ||
| import { createBlob, baseUrl, hasDocument } from './env.js'; | ||
| import { createBlob, baseUrl, nonce, hasDocument } from './env.js'; | ||
|
|
||
| export let supportsDynamicImportCheck = false; | ||
| export let dynamicImport = !hasDocument && (0, eval)('u=>import(u)'); | ||
|
|
||
| // first check basic eval support | ||
| try { | ||
| eval(''); | ||
| } | ||
| catch (e) { | ||
| throw new Error(`The ES Module Shims Wasm build will not work without eval support. Either use the alternative CSP-compatible build or make sure to add both the "unsafe-eval" and "unsafe-wasm-eval" CSP policies.`); | ||
| } | ||
| export let supportsDynamicImport; | ||
|
|
||
| // polyfill dynamic import if not supported | ||
| export let dynamicImport; | ||
| try { | ||
| dynamicImport = (0, eval)('u=>import(u)'); | ||
| supportsDynamicImportCheck = true; | ||
| } | ||
| catch (e) {} | ||
|
|
||
| if (hasDocument && !supportsDynamicImportCheck) { | ||
| let err; | ||
| window.addEventListener('error', _err => err = _err); | ||
| dynamicImport = (url, { errUrl = url }) => { | ||
| err = undefined; | ||
| const src = createBlob(`import*as m from'${url}';self._esmsi=m;`); | ||
| const s = Object.assign(document.createElement('script'), { type: 'module', src }); | ||
| s.setAttribute('noshim', ''); | ||
| document.head.appendChild(s); | ||
| return new Promise((resolve, reject) => { | ||
| s.addEventListener('load', () => { | ||
| document.head.removeChild(s); | ||
| if (self._esmsi) { | ||
| resolve(_esmsi, baseUrl); | ||
| _esmsi = null; | ||
| } | ||
| else { | ||
| reject(err.error || new Error(`Error loading or executing the graph of ${errUrl} (check the console for ${src}).`)); | ||
| err = undefined; | ||
| export const dynamicImportCheck = hasDocument && new Promise(resolve => { | ||
| const s = Object.assign(document.createElement('script'), { | ||
| src: createBlob('self._d=u=>import(u)'), | ||
| ep: true | ||
| }); | ||
| s.setAttribute('nonce', nonce); | ||
| s.addEventListener('load', () => { | ||
| if (!(supportsDynamicImport = !!(dynamicImport = self._d))) { | ||
| let err; | ||
| window.addEventListener('error', _err => err = _err); | ||
| dynamicImport = (url, opts) => new Promise((resolve, reject) => { | ||
| const s = Object.assign(document.createElement('script'), { | ||
| type: 'module', | ||
| src: createBlob(`import*as m from'${url}';self._esmsi=m`) | ||
| }); | ||
| err = undefined; | ||
| s.ep = true; | ||
| if (nonce) | ||
| s.setAttribute('nonce', nonce); | ||
| // Safari is unique in supporting module script error events | ||
| s.addEventListener('error', cb); | ||
| s.addEventListener('load', cb); | ||
| function cb (_err) { | ||
| document.head.removeChild(s); | ||
| if (self._esmsi) { | ||
| resolve(self._esmsi, baseUrl); | ||
| self._esmsi = undefined; | ||
| } | ||
| else { | ||
| reject(!(_err instanceof Event) && _err || err && err.error || new Error(`Error loading ${opts && opts.errUrl || url} (${s.src}).`)); | ||
| err = undefined; | ||
| } | ||
| } | ||
| document.head.appendChild(s); | ||
| }); | ||
| }); | ||
| }; | ||
| } | ||
| } | ||
| document.head.removeChild(s); | ||
| delete self._d; | ||
| resolve(); | ||
| }); | ||
| document.head.appendChild(s); | ||
| }); |
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