我想将新的ES2018扩展运算符用于对象，我发现这个NPM包应该启用它：babel-plugin-transform-object-rest-spread
我的package.json：
"scripts": {
"dev": "webpack-dev-server --inline --progress --config build/webpack.dev.conf.js",
"start": "npm run dev",
"build": "node build/build.js"
},
"dependencies": {
"npm-sass": "^2.2.1",
"vue": "^2.5.13",
"vue-event-hub": "^1.0.2",
"vue2-datepicker": "^1.8.3"
},
"devDependencies": {
"@babel/plugin-proposal-optional-chaining": "^7.0.0-beta.40",
"autoprefixer": "^8.1.0",
"babel-core": "^6.26.0",
"babel-helper-vue-jsx-merge-props": "^2.0.3",
"babel-loader": "^7.1.3",
"babel-plugin-syntax-jsx": "^6.18.0",
"babel-plugin-transform-object-rest-spread": "^6.26.0",
"babel-plugin-transform-runtime": "^6.23.0",
"babel-plugin-transform-vue-jsx": "^3.5.1",
"babel-preset-env": "^1.6.1",
"babel-preset-es2015-node6": "^0.4.0",
"babel-preset-stage-2": "^6.24.1",
"chalk": "^2.3.2",
"copy-webpack-plugin": "^4.5.0",
"css-loader": "^0.28.10",
"extract-text-webpack-plugin": "^3.0.2",
"file-loader": "^1.1.11",
"friendly-errors-webpack-plugin": "^1.6.1",
"html-webpack-plugin": "^3.0.4",
"node-notifier": "^5.2.1",
"optimize-css-assets-webpack-plugin": "^4.0.0",
"ora": "^2.0.0",
"portfinder": "^1.0.13",
"postcss-import": "^11.1.0",
"postcss-loader": "^2.1.1",
"postcss-url": "^7.3.1",
"rimraf": "^2.6.2",
"semver": "^5.5.0",
"shelljs": "^0.8.1",
"uglifyjs-webpack-plugin": "^1.2.2",
"url-loader": "^1.0.1",
"vue-loader": "^14.1.1",
"vue-style-loader": "^4.0.2",
"vue-template-compiler": "^2.5.13",
"webpack": "^4.1.0",
"webpack-bundle-analyzer": "^2.11.1",
"webpack-dev-server": "^3.1.0",
"webpack-merge": "^4.1.2"
},
"engines": {
"node": ">= 6.0.0",
"npm": ">= 3.0.0"
},
"browserslist": [
"> 1%",
"last 2 versions",
"not ie <= 8"
]
当然还有package-lock.json
"babel-plugin-transform-object-rest-spread": {
"version": "6.26.0",
"resolved": "https://registry.npmjs.org/babel-plugin-transform-object-rest-spread/-/babel-plugin-transform-object-rest-spread-6.26.0.tgz",
"integrity": "XXXXXXXXXXX",
"dev": true,
"requires": {
"babel-plugin-syntax-object-rest-spread": "6.13.0",
"babel-runtime": "6.26.0"
}
},
以下是NPM包的链接：https://www.npmjs.com/package/babel-plugin-transform-object-rest-spread
没有太大的东西，这就是为什么我更难找出原因。
我尝试安装：babel-preset-es2015-node6，但这并没有帮助，我尝试将"es2015-node6"添加到"presets"中的.babelrc，也没有任何运气。
所以现在当我尝试使用它时，我在构建过程中遇到错误：
- invalid expression: Unexpected token ... in
{ ...selected_car, date: state.todays_date.toLocaleDateString()}
此错误的原因是：
<div>
<Car v-if="cars.length > 0" v-for="(car,index) in cars" :key="'car-'+index" :data="{ ...car, date: state.todays_date.toLocaleDateString()}" :selected="false" />
<Car v-if="selected_cars.length > 0" v-for="(selected_car,ind) in selected_cars" :key="'selected-car-'+ind" :data="{ ...selected_car, date: state.todays_date.toLocaleDateString()}" :selected="true"/>
</div>
在:data Vue组件的Car属性中。
抱歉，我在上一次编辑中错误地将.babelrc缩减了：
{
"presets": [
["env", {
"modules": false,
"targets": {
"browsers": ["> 1%", "last 2 versions", "not ie <= 8"]
}
}],
"stage-2"
],
"plugins": ["babel-plugin-transform-es2015-destructuring", "transform-object-rest-spread", "transform-vue-jsx", "transform-runtime"]
}
我的webpack.base.conf.js看起来像这样：
'use strict'
const path = require('path')
const utils = require('./utils')
const config = require('../config')
const vueLoaderConfig = require('./vue-loader.conf')
function resolve (dir) {
return path.join(__dirname, '..', dir)
}
module.exports = {
context: path.resolve(__dirname, '../'),
entry: {
app: './src/main.js'
},
output: {
path: config.build.assetsRoot,
filename: '[name].js',
publicPath: process.env.NODE_ENV === 'production'
? config.build.assetsPublicPath
: config.dev.assetsPublicPath
},
resolve: {
extensions: ['.js', '.vue', '.json'],
alias: {
'vue$': 'vue/dist/vue.esm.js',
'@': resolve('src'),
}
},
module: {
rules: [
{
test: /\.vue$/,
loader: 'vue-loader',
options: vueLoaderConfig
},
{
test: /\.js$/,
loader: 'babel-loader',
include: [resolve('src'), resolve('test'), resolve('node_modules/webpack-dev-server/client')]
},
{
test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
loader: 'url-loader',
options: {
limit: 10000,
name: utils.assetsPath('Images/[name].[ext]')
}
},
{
test: /\.(mp4|webm|ogg|mp3|wav|flac|aac)(\?.*)?$/,
loader: 'url-loader',
options: {
limit: 10000,
name: utils.assetsPath('media/[name].[hash:7].[ext]')
}
},
{
test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,
loader: 'url-loader',
options: {
limit: 10000,
name: utils.assetsPath('Stylesheets/[name].[ext]')
}
}
]
},
node: {
// prevent webpack from injecting useless setImmediate polyfill because Vue
// source contains it (although only uses it if it's native).
setImmediate: false,
// prevent webpack from injecting mocks to Node native modules
// that does not make sense for the client
dgram: 'empty',
fs: 'empty',
net: 'empty',
tls: 'empty',
child_process: 'empty'
}
}
答案 0 :(得分：0)
要在模板中使用Object rest spread，您需要：
为buble配置vue-loader选项：
buble: { objectAssign: 'Object.assign' }
如果定位任何IE，请务必在Object.assign中包含polyfill。
请在build/vue-loader.conf.js文件中使用以下配置
var utils = require('./utils')
var config = require('../config')
var isProduction = process.env.NODE_ENV === 'production'
module.exports = {
loaders: utils.cssLoaders({
sourceMap: isProduction
? config.build.productionSourceMap
: config.dev.cssSourceMap,
extract: isProduction
}),
transformToRequire: {
video: 'src',
source: 'src',
img: 'src',
image: 'xlink:href'
},
buble: { objectAssign: 'Object.assign' }
}
如需更多帮助，请使用检查相同类型的问题here。
我已经创建了演示ESNext-In-vue存储库，以便在Vue模板中使用对象rest spread。
希望这会对你有所帮助!!