我可以使用哪种匹配器?

• { test: /\.js$/, loader: 'babel-loader' } - Matches just .js
• { test: /\.(js|jsx)$/, loader: 'babel-loader' } - Matches both js and jsx
• Generally put it's just a JavaScript regex so standard tricks apply

• { test: /\.js$/, loader: 'babel-loader' } - 只匹配 .js
• { test: /\.(js|jsx)$/, loader: 'babel-loader' } - 匹配 js 和 jsx
• 一般来说它就是一段 JavaScript 的正则，所以按照标准来即可