关于mobx:bug-solved-This-experimental-syntax-requires-enabling-xxx

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另外,这俩问题是我在 mobx 中应用 ES7 装璜器语法用到的,用一般的 ES6 语法是不会碰到这样的问题,嫌麻烦也能够不必装璜器语法,奈何我对这种看上去像 Spring 正文的语法垂涎已久。


bug1

Experimental support for decorators is a feature that is subject to change in a future release. Set the ‘experimentalDecorators’ option in your ‘tsconfig’ or ‘jsconfig’ to remove this warning.ts(1219)

问题出在 IDE 不意识这个语法 以 vscode 为例 须要在 setting 中搜“experimentalDecorators”而后勾选上


bug2

Parsing error: This experimental syntax requires enabling one of the following parser plugin(s): “decorators”, “decorators-legacy”. (22:4)eslint

问题出在我的项目自身不意识这个语法(以后这个语法还在试验阶段 babel 还没有正式公布),这个解决起来略微有点麻烦,翻了很久 stackoverflow 和 github issue,答复都是支支吾吾 遮遮掩掩,故作此篇,以飨前人。


step1:

npm i @babel/core @babel/plugin-proposal-decorators @babel/preset-env

step2:
我的项目根目录下创立.babelrc

{"presets": ["@babel/preset-env"],
  "plugins": [["@babel/plugin-proposal-decorators", { "legacy": true}]]
}

step3:
我的项目根目录下创立 config-overrides.js

const path = require('path')
const {override, addDecoratorsLegacy} = require('customize-cra')
function resolve(dir) {return path.join(__dirname, dir) }
const customize = () => (config, env) => {config.resolve.alias['@'] = resolve('src')
    if (env === 'production') {config.externals = { 'react': 'React', 'react-dom': 'ReactDOM'} }
    return config
}; module.exports = override(addDecoratorsLegacy(), customize())

step4:
npm i customize-cra react-app-rewired

step5:
批改 package.json

  "scripts": {
    "start": "react-app-rewired start",
    "build": "react-app-rewired build",
    "test": "react-app-rewired test",
    "eject": "react-app-rewired eject"
  },

而后重启服务器 再次 npm start

bug3

报错 Plugin “react” was conflicted between “package.json …
而后关上 package.json ctrl/command + s 就好啦

(最初这里 vscode 如果出问题,,重启服务器不论用,能够尝试换了一个 IDE 比方 webstorm)

happy hacking~


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