我试图独自学习使用JavaScript的机器学习,但是即使设置package.json文件也遇到了麻烦。我到处都有Google搜索,并尝试了不同的方法,但我不断遇到以下错误
$ browserify src/index.js --node -o dist/index.js -t [ babelify --presets [ env ] ]
TypeError: Cannot read property 'bindings' of null while parsing file: C:\Users\Brian\Desktop\MLinJSBook\Ch1-Ex1\src\greeting.js
这是我的 这是我的package.json文件
{
"name": "Ch1-Ex1",
"version": "1.0.0",
"main": "src/index.js",
"license": "MIT",
"scripts": {
"build-web": "browserify src/index.js -o dist/index.js -t [ babelify --presets [ env ] ]",
"build-cli": "browserify src/index.js --node -o dist/index.js -t [ babelify --presets [ env ] ]",
"start": "yarn build-cli && node dist/index.js"
},
"devDependencies": {
"@babel/cli": "^7.2.0",
"@babel/preset-env": "^7.2.0",
"babel-preset-env": "^1.7.0",
"babel-preset-react-native": "^4.0.1",
"babelify": "^10.0.0",
"browserify": "^16.2.3"
},
"dependencies": {
"@babel/core": "^7.2.0"
}
}
还有我的代码greetingg.js
const greeting = name => 'Hello, ' + name + '!';
export default greeting;
index.js
import greeting from './greeting';
console.log(greeting(process.argv[2] || 'world'));
我认为我没有正确配置babel / preset-env,但是我尝试的所有方法都无法正常工作。任何帮助深表感谢!
答案 0 :(得分:0)
如果您使用Babel 7,则必须更新命令以在预设中使用"@babel/preset-env"
而不是env
。
$ browserify src/index.js --node -o dist/index.js -t [ babelify --presets ["@babel/preset-env" ] ]