Javascript 为什么babel loader不转换对象rest/spread?
我最近在我的一个项目中发现,在使用对象rest/spread语法之后,几乎所有的JS代码都在Edge 18中中断。这让我感到惊讶,因为我预计巴贝尔会将其转换为边缘兼容的代码,但我发现事实并非如此。因此,我选择了@babel/plugin提案对象rest-spread,并将其添加到我的网页配置中,然后再次运行网页包。但是没有运气。我使用了babel的调试选项来检查插件是否实际使用,并且输出结果表明确实使用了。但是当我检查transpiled JS时,我仍然发现其中的spread语法完全没有改变 Babel调试输出:Javascript 为什么babel loader不转换对象rest/spread?,javascript,vue.js,webpack,babeljs,babel-loader,Javascript,Vue.js,Webpack,Babeljs,Babel Loader,我最近在我的一个项目中发现,在使用对象rest/spread语法之后,几乎所有的JS代码都在Edge 18中中断。这让我感到惊讶,因为我预计巴贝尔会将其转换为边缘兼容的代码,但我发现事实并非如此。因此,我选择了@babel/plugin提案对象rest-spread,并将其添加到我的网页配置中,然后再次运行网页包。但是没有运气。我使用了babel的调试选项来检查插件是否实际使用,并且输出结果表明确实使用了。但是当我检查transpiled JS时,我仍然发现其中的spread语法完全没有改变 B
Using targets:
{
"android": "4.4",
"chrome": "74",
"edge": "17",
"firefox": "67",
"ios": "10",
"safari": "10"
}
Using modules transform: false
Using plugins:
transform-template-literals { "android":"4.4", "ios":"10", "safari":"10" }
transform-literals { "android":"4.4" }
transform-function-name { "android":"4.4", "edge":"17" }
transform-arrow-functions { "android":"4.4" }
transform-block-scoped-functions { "android":"4.4" }
transform-classes { "android":"4.4" }
transform-object-super { "android":"4.4" }
transform-shorthand-properties { "android":"4.4" }
transform-duplicate-keys { "android":"4.4" }
transform-computed-properties { "android":"4.4" }
transform-for-of { "android":"4.4" }
transform-sticky-regex { "android":"4.4" }
transform-dotall-regex { "android":"4.4", "edge":"17", "firefox":"67", "ios":"10", "safari":"10" }
transform-unicode-regex { "android":"4.4", "ios":"10", "safari":"10" }
transform-spread { "android":"4.4" }
transform-parameters { "android":"4.4", "edge":"17" }
transform-destructuring { "android":"4.4", "edge":"17" }
transform-block-scoping { "android":"4.4", "ios":"10", "safari":"10" }
transform-new-target { "android":"4.4" }
transform-regenerator { "android":"4.4" }
transform-exponentiation-operator { "android":"4.4", "ios":"10", "safari":"10" }
transform-async-to-generator { "android":"4.4", "ios":"10", "safari":"10" }
proposal-async-generator-functions { "android":"4.4", "edge":"17", "ios":"10", "safari":"10" }
proposal-object-rest-spread { "android":"4.4", "edge":"17", "ios":"10", "safari":"10" }
proposal-unicode-property-regex { "android":"4.4", "edge":"17", "firefox":"67", "ios":"10", "safari":"10" }
proposal-json-strings { "android":"4.4", "edge":"17", "ios":"10", "safari":"10" }
proposal-optional-catch-binding { "android":"4.4", "edge":"17", "ios":"10", "safari":"10" }
transform-named-capturing-groups-regex { "android":"4.4", "edge":"17", "firefox":"67", "ios":"10", "safari":"10" }
Using polyfills with `usage` option:
[/app/node_modules/swiper/dist/js/swiper.esm.js] Added following core-js polyfills:
es.array.concat { "android":"4.4" }
es.array.filter { "android":"4.4" }
es.array.find { "android":"4.4" }
es.array.includes { "android":"4.4" }
es.array.index-of { "android":"4.4" }
es.array.map { "android":"4.4" }
es.array.slice { "android":"4.4" }
es.array.sort { "android":"4.4", "ios":"10", "safari":"10" }
es.array.splice { "android":"4.4" }
es.object.get-own-property-descriptor { "android":"4.4" }
es.object.keys { "android":"4.4" }
es.object.to-string { "android":"4.4" }
es.parse-float { "android":"4.4" }
es.parse-int { "android":"4.4" }
es.regexp.to-string { "android":"4.4", "edge":"17" }
es.string.includes { "android":"4.4", "edge":"17" }
es.string.match { "android":"4.4", "edge":"17" }
es.string.replace { "android":"4.4", "edge":"17", "firefox":"67", "ios":"10", "safari":"10" }
es.string.split { "android":"4.4", "edge":"17" }
esnext.array.last-index { "android":"4.4", "chrome":"74", "edge":"17", "firefox":"67", "ios":"10", "safari":"10" }
web.dom-collections.for-each { "android":"4.4" }
64% building 687/752 modules 65 active /app/node_modules/lodash-es/padStart.js
[/app/node_modules/dom7/dist/dom7.modular.js] Added following core-js polyfills:
es.array.concat { "android":"4.4" }
es.array.filter { "android":"4.4" }
es.array.index-of { "android":"4.4" }
es.array.splice { "android":"4.4" }
es.object.assign { "android":"4.4" }
es.object.keys { "android":"4.4" }
es.parse-float { "android":"4.4" }
es.string.match { "android":"4.4", "edge":"17" }
es.string.replace { "android":"4.4", "edge":"17", "firefox":"67", "ios":"10", "safari":"10" }
es.string.split { "android":"4.4", "edge":"17" }
es.string.trim { "android":"4.4", "ios":"10", "safari":"10" }
web.dom-collections.for-each { "android":"4.4" }
Hash: b3541120009438066b1e
Version: webpack 4.30.0 / grunt-webpack 3.1.3
因此,从那以后,我拼命想让巴贝尔传输代码,但什么也没发生,我没有想法和搜索词来尝试。使它更为精妙的是,我使用的堆栈没有什么特别之处,我已经在其他项目中使用过它,而且从未出现过这个问题
我正在使用Vue、Webpack+Babel。网页包通过Grunt运行
我的网页包配置:
const VueLoaderPlugin = require('vue-loader/lib/plugin');
module.exports = function (grunt, options) {
/* skip loading if task is not necessary for current target */
if (!grunt.isConfigLoadingRequired('webpack')) {
return {};
}
return (function () {
const path = require('path');
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
const DotenvPlugin = require('dotenv-webpack');
const webpack = require('webpack');
const plugins = [
new webpack.IgnorePlugin(/^(.*)$/, /node-jsb$/),
new DotenvPlugin(),
new VueLoaderPlugin(),
];
/* remember to update jest transformer at tests/setup/ when changing loader options */
const getLoaderRulesConfig = (targets, debug = false) => ([
{
test: /\.vue$/,
loader: 'vue-loader',
},
{
test: /\.js$/,
enforce: 'pre',
loader: 'import-glob',
include: [path.resolve('<%= paths.src %>')],
},
{
test: /\.js$/,
loader: 'babel-loader',
/* remember to update jest transformIgnorePatterns at grunt/config/jest.js when adding includes */
include: [
path.resolve('<%= paths.src %>'),
path.resolve('node_modules/dom7'),
path.resolve('node_modules/swiper'),
],
options: {
compact: true,
cacheDirectory: true,
cacheCompression: false,
babelrc: false,
plugins: [
[
'@babel/plugin-transform-runtime', {
regenerator: false,
useESModules: true,
},
],
'@babel/plugin-proposal-object-rest-spread',
['@babel/plugin-proposal-class-properties', { loose: true }],
],
presets: [
[
'@babel/preset-env', {
modules: false,
loose: true,
useBuiltIns: 'usage',
corejs: { version: 3, proposals: true },
targets,
debug,
},
],
],
},
},
]);
return {
options: {
cache: true,
entry: {
main: './<%= paths.src %>/js/_main.js',
},
output: {
filename: '[name].js',
chunkFilename: '[name].[chunkhash].js',
path: path.resolve('<%= paths.static %>/generated/'),
publicPath: '/static/generated/',
},
plugins,
resolve: {
mainFields: ['browser', 'main', 'module'],
symlinks: false,
},
performance: {
maxEntrypointSize: 500000,
maxAssetSize: 500000,
},
},
analyze: {
mode: 'production',
watch: true,
stats: {
maxModules: 99999,
},
optimization: {
concatenateModules: false,
},
output: {
path: path.resolve('<%= paths.tmp %>/js/'),
},
module: {
rules: getLoaderRulesConfig({ esmodules: true }, true),
},
plugins: [new BundleAnalyzerPlugin()],
},
dev: {
mode: 'development',
module: {
rules: getLoaderRulesConfig({ browsers: options.browserslist }, true),
},
},
devModern: {
mode: 'development',
devtool: 'source-map',
module: {
rules: getLoaderRulesConfig({ esmodules: true }),
},
output: {
filename: '[name].modern.js',
chunkFilename: '[name].modern.[chunkhash].js',
},
},
dist: {
mode: 'production',
module: {
rules: getLoaderRulesConfig({ browsers: options.browserslist }),
},
},
distModern: {
mode: 'production',
module: {
rules: getLoaderRulesConfig({ esmodules: true }),
},
output: {
filename: '[name].modern.js',
chunkFilename: '[name].modern.[chunkhash].js',
},
},
};
}());
};
const VueLoaderPlugin=require('vue-loader/lib/plugin');
module.exports=函数(grunt,选项){
/*如果当前目标不需要任务,则跳过加载*/
如果(!grunt.isConfigLoadingRequired('webpack')){
返回{};
}
返回(函数(){
const path=require('path');
const BundleAnalyzerPlugin=require('webpack-bundle-analyzer')。BundleAnalyzerPlugin;
const DotenvPlugin=require('dotenv-webpack');
const webpack=require('webpack');
常量插件=[
新建webpack.IgnorePlugin(/^(.*)$/,/node jsb$/),
新建DotenvPlugin(),
新的VueLoaderPlugin(),
];
/*请记住在测试/设置/更改加载程序选项时更新jest transformer*/
const getLoaderRulesConfig=(目标,调试=false)=>([
{
测试:/\.vue$/,,
加载程序:“vue加载程序”,
},
{
测试:/\.js$/,,
强制执行:“预”,
加载器:“导入全局”,
包括:[路径解析(“”)],
},
{
测试:/\.js$/,,
加载器:“巴别塔加载器”,
/*在添加includes时,请记住在grunt/config/jest.js处更新jest transformIgnorePatterns*/
包括:[
路径解析(“”),
解析('node_modules/dom7'),
path.resolve('node_modules/swiper'),
],
选项:{
是的,
cacheDirectory:true,
缓存压缩:false,
巴别塔:错,
插件:[
[
“@babel/plugin转换运行时”{
再生器:错,
使用模块:正确,
},
],
“@babel/plugin提案对象rest spread”,
['@babel/plugin建议类属性',{loose:true}],
],
预设:[
[
“@babel/preset env”{
模块:错误,
是的,
useBuiltIns:“用法”,
corejs:{version:3,propositions:true},
目标,,
调试,
},
],
],
},
},
]);
返回{
选项:{
是的,
条目:{
main:'.//js/_main.js',
},
输出:{
文件名:'[name].js',
chunkFilename:'[name].[chunkhash].js',,
path:path.resolve('/generated/'),
publicPath:“/static/generated/”,
},
插件,
决心:{
主字段:[“浏览器”、“主”、“模块”],
符号链接:false,
},
性能:{
maxEntrypointSize:500000,
最大资产规模:500000,
},
},
分析:{
模式:"生产",,
手表:没错,
统计数据:{
最大模块数:99999,
},
优化:{
连接emodules:false,
},
输出:{
path:path.resolve('/js/'),
},
模块:{
规则:getLoaderRulesConfig({esmodules:true},true),
},
插件:[新BundleAnalyzerPlugin()],
},
开发人员:{
模式:"发展",,
模块:{
规则:getLoaderRulesConfig({browsers:options.browserslist},true),
},
},
现代:{
模式:"发展",,
devtool:'源映射',
模块:{
规则:getLoaderRulesConfig({esmodules:true}),
},
输出:{
文件名:'[name].modern.js',
chunkFilename:'[name].modern[chunkhash].js',,
},
},
地区:{
模式:"生产",,
模块:{
规则:getLoaderRulesConfig({browsers:options.browserslist}),
},
},
现代主义:{
模式:"生产",,
模块:{
规则:getLoaderRulesConfig({esmodules:true})