es7修饰器

es7的新特性之一就是加入了修饰器(decorator)。

安装es7转码包

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npm install --save-dev babel-plugin-transform-decorators-legacy babel-plugin-transform-class-properties

配置.babelrc

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{
  "plugins": ["transform-decorators-legacy", "transform-class-properties"]
}

装饰器实例

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function deprecated(target) {
  console.log("method is deprecated");
}

class A {
  @deprecated
  m() {}
}