与javascript中的类的异步函数 [英] async function with the class in javascript

问题描述

我已经在nodejs中创建了一个类

I have create a class in nodejs

class ApnService {
  sendNotification(deviceType, deviceToken, msg, type, id) {
    try {
      const note = await apnProvider.send(note, deviceToken)
      console.log(note)
    } catch (err) {
      console.log(err)
    }
  }
}

export default ApnService

我需要做的是将上述函数转换为async.但是当我使用下面的语法时，它会抛出错误

What I need to do is to convert above function to async. But when I use below syntax It throws me error

SyntaxError: src/services/apn.js: Unexpected token (43:19)
  41 |   }
  42 | 
> 43 |   sendNotification = async(deviceType, deviceToken, msg, type, id) => {
     | 

               ^

下面是语法

class ApnService {
  sendNotification = async(deviceType, deviceToken, msg, type, id) => {
    try {
      const note = await apnProvider.send(note, deviceToken)
      console.log(note)
    } catch (err) {
      console.log(err)
    }
  }
}

export default ApnService

推荐答案

您只需在函数名称前添加async即可将该函数声明为异步，

You can simply add async before function name to declare that function as async,

class ApnService {
  async sendNotification(deviceType, deviceToken, msg, type, id) {
    try {
      const note = await apnProvider.send(note, deviceToken)
      console.log(note)
    } catch (err) {
      console.log(err)
    }
  }
}

export default ApnService

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