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feat(build): default build target to 'modules' with dynamic import po…
…lyfill
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126 changes: 126 additions & 0 deletions
126
packages/vite/src/node/plugins/dynamicImportPolyfill.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,126 @@ | ||
| import { ResolvedConfig } from '..' | ||
| import { Plugin } from '../plugin' | ||
|
|
||
| export const polyfillId = 'vite/dynamic-import-polyfill' | ||
|
|
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| export function dynamicImportPolyfillPlugin(config: ResolvedConfig): Plugin { | ||
| const skip = config.command === 'serve' || config.build.ssr | ||
| let polyfillLoaded = false | ||
|
|
||
| return { | ||
| name: 'vite:dynamic-import-polyfill', | ||
| resolveId(id) { | ||
| if (id === polyfillId) { | ||
| return id | ||
| } | ||
| }, | ||
| load(id) { | ||
| if (id === polyfillId) { | ||
| if (skip) { | ||
| return '' | ||
| } | ||
| polyfillLoaded = true | ||
| return ( | ||
| polyfill.toString() + | ||
| `;polyfill(${JSON.stringify(config.build.base)});` | ||
| ) | ||
| } | ||
| }, | ||
| renderDynamicImport() { | ||
| if (skip) { | ||
| return null | ||
| } | ||
| if (!polyfillLoaded) { | ||
| throw new Error( | ||
| `Vite's dynamic import polyfill is enabled but was never imported. This ` + | ||
| `should only happen when using custom non-html rollup inputs. Make ` + | ||
| `sure to add \`import "${polyfillId}"\` as the first statement in ` + | ||
| `your custom entry.` | ||
| ) | ||
| } | ||
| return { | ||
| left: '__import__(', | ||
| right: ')' | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| The following polyfill function is meant to run in the browser and adapted from | ||
| https://github.com/GoogleChromeLabs/dynamic-import-polyfill | ||
| MIT License | ||
| Copyright (c) 2018 uupaa and 2019 Google LLC | ||
| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
| The above copyright notice and this permission notice shall be included in all | ||
| copies or substantial portions of the Software. | ||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| */ | ||
|
|
||
| declare const self: any | ||
| declare const location: any | ||
| declare const document: any | ||
| declare const URL: any | ||
| declare const Blob: any | ||
|
|
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| function polyfill(modulePath = '.', importFunctionName = '__import__') { | ||
| try { | ||
| self[importFunctionName] = new Function('u', `return import(u)`) | ||
| } catch (error) { | ||
| const baseURL = new URL(modulePath, location) | ||
| const cleanup = (script: any) => { | ||
| URL.revokeObjectURL(script.src) | ||
| script.remove() | ||
| } | ||
|
|
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| self[importFunctionName] = (url: string) => | ||
| new Promise((resolve, reject) => { | ||
| const absURL = new URL(url, baseURL) | ||
|
|
||
| // If the module has already been imported, resolve immediately. | ||
| if (self[importFunctionName].moduleMap[absURL]) { | ||
| return resolve(self[importFunctionName].moduleMap[absURL]) | ||
| } | ||
|
|
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| const moduleBlob = new Blob( | ||
| [ | ||
| `import * as m from '${absURL}';`, | ||
| `${importFunctionName}.moduleMap['${absURL}']=m;` | ||
| ], | ||
| { type: 'text/javascript' } | ||
| ) | ||
|
|
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| const script = Object.assign(document.createElement('script'), { | ||
| type: 'module', | ||
| src: URL.createObjectURL(moduleBlob), | ||
| onerror() { | ||
| reject(new Error(`Failed to import: ${url}`)) | ||
| cleanup(script) | ||
| }, | ||
| onload() { | ||
| resolve(self[importFunctionName].moduleMap[absURL]) | ||
| cleanup(script) | ||
| } | ||
| }) | ||
|
|
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| document.head.appendChild(script) | ||
| }) | ||
|
|
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| self[importFunctionName].moduleMap = {} | ||
| } | ||
| } |
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