Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
feat: modulepreload polyfill (#4058)
- Loading branch information
Showing
7 changed files
with
155 additions
and
12 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
100 changes: 100 additions & 0 deletions
100
packages/vite/src/node/plugins/modulePreloadPolyfill.ts
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| import { ResolvedConfig } from '..' | ||
| import { Plugin } from '../plugin' | ||
| import { isModernFlag } from './importAnalysisBuild' | ||
|
|
||
| export const modulePreloadPolyfillId = 'vite/modulepreload-polyfill' | ||
|
|
||
| export function modulePreloadPolyfillPlugin(config: ResolvedConfig): Plugin { | ||
| const skip = config.build.ssr | ||
| let polyfillString: string | undefined | ||
|
|
||
| return { | ||
| name: 'vite:modulepreload-polyfill', | ||
| resolveId(id) { | ||
| if (id === modulePreloadPolyfillId) { | ||
| return id | ||
| } | ||
| }, | ||
| load(id) { | ||
| if (id === modulePreloadPolyfillId) { | ||
| if (skip) { | ||
| return '' | ||
| } | ||
| if (!polyfillString) { | ||
| polyfillString = | ||
| `const p = ${polyfill.toString()};` + `${isModernFlag}&&p();` | ||
| } | ||
| return polyfillString | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| The following polyfill function is meant to run in the browser and adapted from | ||
| https://github.com/guybedford/es-module-shims | ||
| MIT License | ||
| Copyright (C) 2018-2021 Guy Bedford | ||
| 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 document: any | ||
| declare const MutationObserver: any | ||
| declare const fetch: any | ||
|
|
||
| function polyfill() { | ||
| const relList = document.createElement('link').relList | ||
| if (relList && relList.supports && relList.supports('modulepreload')) { | ||
| return | ||
| } | ||
|
|
||
| for (const link of document.querySelectorAll('link[rel="modulepreload"]')) { | ||
| processPreload(link) | ||
| } | ||
|
|
||
| new MutationObserver((mutations: any) => { | ||
| for (const mutation of mutations) { | ||
| if (mutation.type !== 'childList') { | ||
| continue | ||
| } | ||
| for (const node of mutation.addedNodes) { | ||
| if (node.tagName === 'LINK' && node.rel === 'modulepreload') | ||
| processPreload(node) | ||
| } | ||
| } | ||
| }).observe(document, { childList: true, subtree: true }) | ||
|
|
||
| function getFetchOpts(script: any) { | ||
| const fetchOpts = {} as any | ||
| if (script.integrity) fetchOpts.integrity = script.integrity | ||
| if (script.referrerpolicy) fetchOpts.referrerPolicy = script.referrerpolicy | ||
| if (script.crossorigin === 'use-credentials') | ||
| fetchOpts.credentials = 'include' | ||
| else if (script.crossorigin === 'anonymous') fetchOpts.credentials = 'omit' | ||
| else fetchOpts.credentials = 'same-origin' | ||
| return fetchOpts | ||
| } | ||
|
|
||
| function processPreload(link: any) { | ||
| if (link.ep) | ||
| // ep marker = processed | ||
| return | ||
| link.ep = true | ||
| // prepopulate the load record | ||
| const fetchOpts = getFetchOpts(link) | ||
| fetch(link.href, fetchOpts) | ||
| } | ||
| } |