如何设置useBuiltIns选项
如何设置useBuiltIns选项
提问于 2020-06-08 21:06:27
我使用的是Webpack，我想要设置Babel的"useBuiltIns“选项，以便在我的JS文件中为"promises”启用pollyfills。
我找不到一个完整的工作示例，我所有的尝试都以错误告终。
这是我的package.json try：
{
"name": "test",
"version": "1.0.0",
"description": "",
"main": "index.js",
"dependencies": {
"@babel/polyfill": "^7.10.1",
"bootstrap": "^4.5.0",
"flatpickr": "^4.6.3",
"jquery": "^3.5.1",
"js-cookie": "^2.2.1",
"lazysizes": "^4.1.7",
"leaflet": "^1.6.0",
"lg-thumbnail": "^1.2.0",
"lightgallery": "^1.7.0",
"owl.carousel": "^2.3.4",
"popper.js": "^1.16.1",
"slick-carousel": "^1.8.1",
"yuglify": "^0.1.4"
},
"devDependencies": {
"@babel/core": "^7.10.2",
"@babel/preset-env": "^7.10.2",
"babel": "^6.23.0",
"babel-loader": "^8.1.0",
"clean-webpack-plugin": "^3.0.0",
"css-loader": "^3.5.3",
"file-loader": "^6.0.0",
"react": "^16.13.1",
"sass": "^1.26.8",
"sass-loader": "^8.0.2",
"style-loader": "^1.2.1",
"webpack": "^4.43.0",
"webpack-bundle-tracker": "0.4.3",
"webpack-cli": "^3.3.11",
"webpack-merge": "^4.2.2"
},
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"start": "webpack --config webpack.dev.js --watch",
"build": "webpack --config webpack.prod.js"
},
"author": "",
"license": "ISC",
"babel": {
"useBuiltIns": "entry" <------ this is not working
}
}根据文档，有一种选择。"useBuiltins“可用(https://babeljs.io/docs/en/babel-polyfill#usage-in-node-browserify-webpack)
根据文档，我可以将巴别塔选项放到我的package.json中的“巴别塔”(https://babeljs.io/docs/en/6.26.3/babelrc)下。
回答 1
Stack Overflow用户
发布于 2020-06-10 13:33:56
@babel/polyfill已弃用，请使用core-js和regenerator。这来自于https://babeljs.io/docs/en/babel-preset-env“因为@babel/polyfill在7.4.0中被废弃了，我们建议直接添加core-js并通过corejs选项设置版本。”
您的预设将如下所示
const presets = [
[
'@babel/preset-env',
{
useBuiltIns: 'usage',
corejs: { version: 3, proposals: true }
}
],并安装
"core-js": "^3.6.5",
"regenerator-runtime": "^0.13.5",最后，将@babel/polyfill导入替换为
import 'core-js/stable';
import 'regenerator-runtime/runtime';您还可以相应地将浏览器列表目标设置为polyfill
例如
"browserslist": [
">0.2%",
"not dead",
"not ie <= 11"
]页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/62262790
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