类中的异步函数 [英] Async function inside a class

问题描述

当我尝试运行类中描述的异步函数时出现此错误

I get this error when I try to run an async function described in a class

masterClass.js

class MasterClass{

  async function updateData(a, b){
    let [ res1, res2 ] = await Promise.all(call1, call2);
    return  [ res1, res2 ]
  }

}

test.js

const MasterClass =  require('./MasterClass.js')
let m = new MasterClass()
m.updateData(a, b)

错误

async function updateData(a, b){
                 ^^^^^^^^^^
SyntaxError: Unexpected identifier

推荐答案

你不需要函数正如@dfsq在评论中指出的那样

You dont need function as pointed out by @dfsq in the comments

然后你必须使用 module.exports 或 export 将您的类作为模块公开。

Then you have to use module.exports or export to exposed your class as a module.

masterclass.js

masterclass.js

module.exports = class MasterClass{

  async updateData(a, b){
    let [ res1, res2 ] = await Promise.all(call1, call2);
    return  [ res1, res2 ]
  }

}

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