>我将 babel 更新到最新版本，但仍然收到指向"="运算符的错误
35 | export const AssignmentsContainer = connectedContainer(
36 | class extends Component {
> 37 | buildAssignments = () => {
| ^
debug.log并没有真正提供任何明显的提示
此时的 package.json 如下所示：
{
"private": true,
"scripts": {
"dev": "npm run development",
"development": "cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
"watch": "npm run development -- --watch",
"watch-poll": "npm run watch -- --watch-poll",
"hot": "cross-env NODE_ENV=development node_modules/webpack-dev-server/bin/webpack-dev-server.js --inline --hot --config=node_modules/laravel-mix/setup/webpack.config.js",
"prod": "npm run production",
"production": "cross-env NODE_ENV=production node_modules/webpack/bin/webpack.js --no-progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js"
},
"devDependencies": {
"axios": "^0.18.1",
"babel-preset-env": "^1.7.0",
"babel-preset-react": "^6.24.1",
"bootstrap": "^4.3.1",
"cross-env": "^5.1",
"jquery": "^3.4.1",
"laravel-mix": "^2.0",
"lodash": "^4.17.15",
"popper.js": "^1.12",
"react": "^16.9.0",
"react-dom": "^16.2.0"
},
"dependencies": {
"core-js": "^3.2.1",
"react-bootstrap": "^1.0.0-beta.12",
"react-html-parser": "^2.0.2",
"react-redux": "^7.1.1",
"redux": "^4.0.4"
}
}
也尝试筛选这个，但总是空的：https://github.com/JeffreyWay/laravel-mix/issues/1402
仍然不支持类属性。因此，您需要使用有助于转换类属性的@babel/plugin-proposal-class-properties。
你需要安装 babel 插件：
npm install --save-dev @babel/plugin-proposal-class-properties
并且，在您的.babelrc文件中，您需要输入：
"plugins": ["@babel/plugin-proposal-class-properties"]
这将解决您的问题。
在您分享的链接中，提到使用"babel-plugin-transform-class-properties"，但这适用于旧版本的 Babel。自 Babel v7 起，名称已更改为"@babel/plugin-proposal-class-properties"
对于 7 之前的 Babel 版本：
安装 babel-plugin-transform-class-properties 插件：
npm install --save-dev babel-plugin-transform-class-properties
然后，在 .babelrc 中输入：
"plugins": ["transform-class-properties"]