5

尽管预设是自动安装的,但我似乎无法让 Babel 与 Parcel 一起使用。它在本地和 Chrome 中工作,但它没有转换 node_modules es6 文件,所以输出仍然有const/let/...,并且无法在 Safari 中运行。

.babelrc

{
  "presets": ["@babel/preset-env","@babel/preset-react"]
}

(我也试过envreact)。

package.json 脚本

"scripts": {
    "start": "parcel index.html",
    "build": "parcel build index.html",

为什么会这样?

完整的 package.json (注意这是在为了让它工作而搞砸之后)

{
  "name": "my-react-app",
  "version": "1.0.0",
  "description": "",
  "main": "src/index.js",
  "scripts": {
    "start": "parcel index.html",
    "build": "parcel build index.html"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "@babel/core": "^7.1.5",
    "@babel/preset-env": "^7.1.5",
    "@babel/preset-react": "^7.0.0",
    "axios": "^0.18.0",
    "babel-polyfill": "^6.26.0",
    "browserslist": "^4.3.4",
    "lodash": "^4.17.11",
    "node-sass": "^4.10.0",
    "pinyin": "^2.8.3",
    "prop-types": "^15.6.2",
    "react": "^16.6.1",
    "react-dom": "^16.6.1",
    "react-notifications": "^1.4.3",
    "react-router-dom": "^4.3.1"
  },
  "devDependencies": {
    "cssnano": "^4.1.7",
    "sass": "^1.14.3"
  }
}

const仍然使用,获取 .js 文件let。有什么我想念的想法吗?

4

1 回答 1

2

我从https://github.com/parcel-bundler/parcel/issues/1655#issuecomment-425593377找到了解决方案

// .browserslistrc.packages
node 10.11

// package.json
{
  "scripts": {
    "postinstall": "npm-run-all -p \"postinstall:*\"",
    "postinstall:p-retry": "cpy --rename=.browserslistrc .browserslistrc.packages node_modules/p-retry",
    "postinstall:query-string": "cpy --rename=.browserslistrc .browserslistrc.packages node_modules/query-string"
  }
}

postinstall:package-name为您需要添加编译的每个 npm 包添加一个(在我的情况下,)pinyinnpm run postinstall在每个npm install. Babel 现在也应该转译那个 npm 包了!

于 2018-11-11T15:40:09.597 回答