javascript - 此实验性语法需要启用以下解析器插件之一:'classPrivateProperties, classPrivateMethods'
问题描述
我正在尝试使用 parcel 捆绑我的 javascript 文件,一切正常,除了我在运行时遇到这个问题npm run start
@parcel/transformer-js: This experimental syntax requires enabling one of the following parser plugin(s): 'classPrivateProperties, classPrivateMethods'
经过一番谷歌搜索后,我发现我需要安装classPrivateProperties
, classPrivateMethods
所以我做了,但这里发生的同样问题是我的package.json
文件
{
"name": "starter",
"version": "1.0.0",
"description": "",
"main": "index.html",
"scripts": {
"start": "parcel index.html",
"build": "parcel build index.html"
},
"author": "",
"license": "ISC",
"devDependencies": {
"@babel/plugin-proposal-private-methods": "^7.13.0",
"@babel/plugin-proposal-private-property-in-object": "^7.13.0",
"@parcel/optimizer-cssnano": "^2.0.0-nightly.612",
"@parcel/optimizer-htmlnano": "^2.0.0-nightly.612",
"@parcel/packager-css": "^2.0.0-nightly.612",
"@parcel/packager-html": "^2.0.0-nightly.612",
"@parcel/transformer-css": "^2.0.0-nightly.612",
"@parcel/transformer-html": "^2.0.0-nightly.612",
"@parcel/transformer-postcss": "^2.0.0-nightly.612",
"@parcel/transformer-posthtml": "^2.0.0-nightly.612",
"@parcel/transformer-sass": "^2.0.0-nightly.612",
"node": "^15.10.0",
"parcel": "^2.0.0-beta.1",
"postcss": "^8.2.6",
"sass": "^1.26.10"
},
"dependencies": {
"core-js": "^3.6.5",
"fractional": "^1.0.0",
"regenerator-runtime": "^0.13.7"
},
"plugins": [
"@babel/plugin-proposal-private-methods",
"@babel/plugin-proposal-private-property-in-object"
]
}
感谢您的帮助
解决方案
如果你在谈论 Parcel.js,你需要安装和配置一些 Babel 插件,以启用类私有属性和方法:
使用 NPM 安装此软件包:
npm i @babel/plugin-proposal-private-methods @babel/plugin-proposal-class-properties
使用以下命令在项目的根文件夹中创建
.babelrc
文件:
{
"plugins": [
"@babel/plugin-proposal-class-properties",
"@babel/plugin-proposal-private-methods"
]
}
- 再次运行包裹。
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