我正在使用npm运行一个React项目。经过数小时的研究和实验,到处都有人说我必须将以下代码添加到我的“ .babelrc”文件中,该文件在我的目录中没有,因此无法创建:
{ "plugins": [ ["@babel/plugin-proposal-class-properties", { "loose": true }] ] }
但这在运行代码时导致以下错误:
ERROR in ./src/components/NavBar/Menu.js Module build failed (from ./node_modules/babel-loader/lib/index.js): SyntaxError: /Users/ymoondhra/Desktop/yt-web/src/components/NavBar/Menu.js: Support for the experimental syntax 'classProperties' isn't currently enabled (20:10): 18 | } 19 | > 20 | fast = () => { | ^ 21 | this.speed = 100; 22 | } 23 | Add @babel/plugin-proposal-class-properties (https://git.io/vb4SL) to the 'plugins' section of your Babel config to enable transformation.
3小时后找到我的问题的解决方案:–在根目录中创建一个名为“ babel.config.js”的文件。–将其放入文件中。–重新运行程序(即npm start)。
module.exports = { presets: [ "@babel/preset-env", "@babel/preset-react" ], plugins: [ "@babel/plugin-transform-arrow-functions", "@babel/plugin-proposal- class-properties" ] }