js @装饰器报语法错误解决方法

UnhandledPromiseRejectionWarning: SyntaxError: /home/tree/桌面/item/node/ice/server/router/wechat.js: Unexpected token (9:0)

  7 |  

  8 | console.log(controller)

>  9 | @controller('') //给类添加一个属性symbolPrefix：‘’

    | ^

 10 | export class WxController {

npm i --save-dev babel-plugin-transform-decorators-legacy
           

.babelrc
{

"presets": ["env"],
"plugins": ["transform-decorators-legacy"]
}