111 lines
4.1 KiB
JavaScript
111 lines
4.1 KiB
JavaScript
const fs = require('fs-extra')
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const path = require('path')
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// https://gist.github.com/samthor/64b114e4a4f539915a95b91ffd340acc
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const safariFix = `!function(){var e=document,t=e.createElement("script");if(!("noModule"in t)&&"onbeforeload"in t){var n=!1;e.addEventListener("beforeload",function(e){if(e.target===t)n=!0;else if(!e.target.hasAttribute("nomodule")||!n)return;e.preventDefault()},!0),t.type="module",t.src=".",e.head.appendChild(t),t.remove()}}();`
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class ModernModePlugin {
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constructor ({ targetDir, isModernBuild, unsafeInline, jsDirectory }) {
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this.targetDir = targetDir
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this.isModernBuild = isModernBuild
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this.unsafeInline = unsafeInline
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this.jsDirectory = jsDirectory
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}
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apply (compiler) {
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if (!this.isModernBuild) {
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this.applyLegacy(compiler)
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} else {
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this.applyModern(compiler)
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}
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}
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applyLegacy (compiler) {
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const ID = `vue-cli-legacy-bundle`
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compiler.hooks.compilation.tap(ID, compilation => {
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compilation.hooks.htmlWebpackPluginAlterAssetTags.tapAsync(ID, async (data, cb) => {
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// get stats, write to disk
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await fs.ensureDir(this.targetDir)
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const htmlName = path.basename(data.plugin.options.filename)
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// Watch out for output files in sub directories
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const htmlPath = path.dirname(data.plugin.options.filename)
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const tempFilename = path.join(this.targetDir, htmlPath, `legacy-assets-${htmlName}.json`)
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await fs.mkdirp(path.dirname(tempFilename))
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await fs.writeFile(tempFilename, JSON.stringify(data.body))
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cb()
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})
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})
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}
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applyModern (compiler) {
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const ID = `vue-cli-modern-bundle`
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compiler.hooks.compilation.tap(ID, compilation => {
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compilation.hooks.htmlWebpackPluginAlterAssetTags.tapAsync(ID, async (data, cb) => {
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// use <script type="module"> for modern assets
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data.body.forEach(tag => {
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if (tag.tagName === 'script' && tag.attributes) {
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tag.attributes.type = 'module'
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}
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})
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// use <link rel="modulepreload"> instead of <link rel="preload">
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// for modern assets
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data.head.forEach(tag => {
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if (tag.tagName === 'link' &&
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tag.attributes.rel === 'preload' &&
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tag.attributes.as === 'script') {
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tag.attributes.rel = 'modulepreload'
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}
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})
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// inject links for legacy assets as <script nomodule>
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const htmlName = path.basename(data.plugin.options.filename)
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// Watch out for output files in sub directories
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const htmlPath = path.dirname(data.plugin.options.filename)
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const tempFilename = path.join(this.targetDir, htmlPath, `legacy-assets-${htmlName}.json`)
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const legacyAssets = JSON.parse(await fs.readFile(tempFilename, 'utf-8'))
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.filter(a => a.tagName === 'script' && a.attributes)
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legacyAssets.forEach(a => { a.attributes.nomodule = '' })
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if (this.unsafeInline) {
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// inject inline Safari 10 nomodule fix
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data.body.push({
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tagName: 'script',
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closeTag: true,
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innerHTML: safariFix
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})
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} else {
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// inject the fix as an external script
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const safariFixPath = path.join(this.jsDirectory, 'safari-nomodule-fix.js')
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const fullSafariFixPath = path.join(compilation.options.output.publicPath, safariFixPath)
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compilation.assets[safariFixPath] = {
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source: function () {
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return new Buffer(safariFix)
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},
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size: function () {
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return Buffer.byteLength(safariFix)
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}
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}
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data.body.push({
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tagName: 'script',
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closeTag: true,
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attributes: {
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src: fullSafariFixPath
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}
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})
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}
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data.body.push(...legacyAssets)
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await fs.remove(tempFilename)
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cb()
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})
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compilation.hooks.htmlWebpackPluginAfterHtmlProcessing.tap(ID, data => {
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data.html = data.html.replace(/\snomodule="">/g, ' nomodule>')
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})
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})
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}
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}
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ModernModePlugin.safariFix = safariFix
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module.exports = ModernModePlugin
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