在 react.js 中使用异步时，`'async' 修饰符只能用于 TypeScript files.ts(8009)` 错误

Question

所以当我尝试在 react 文件中添加 async/await 时，我得到了这个错误：

The 'async' modifier can only be used in TypeScript files.ts(8009)

这是否意味着我不能在 React 中使用 async/await 或者这是 vs 代码的问题，或者我可以做些什么来启用它？

这是整个文件：

import React from 'react'
import Button from 'react-bootstrap/Button'
import {addOrder} from '../actions/orderAction'
import {connect} from 'react-redux'

class Dish extends React.Component{

    async handleClick = (dish) =>{
     this.props.addOrder(dish)
     localStorage.setItem("order", this.props.order)
     alert(`${dish.name} added to your order!`)
    }


    render(){
      let dish = this.props.dish  
        return(
        <div className="col-4">  
            <img />
            <h5>{dish.name}         ${dish.price}</h5>
            <Button onClick = {()=>this.handleClick(dish)} size="sm" variant="primary">Order</Button> 
        </div>
    )
  }
}

const mapDispatchToProps = dispatch =>{
    return {
        addOrder: (dish) =>dispatch(addOrder(dish))
    }
}

const mapStateToProps = state =>{
    return{
        order: state.order
    }
}


export default connect(null,mapDispatchToProps)(Dish)

谢谢！

Answer 1

对于普通函数，我们将 async 关键字放在函数名之前

async handleClick(dish) {   this.props.addOrder(dish)  
 localStorage.setItem("order", this.props.order)   alert(`${dish.name}
 added to your order!`) }

对于 lambda 函数，我们将 aync 关键字放在参数之前

 handleClick = async (dish) =>{
     this.props.addOrder(dish)
     localStorage.setItem("order", this.props.order)
     alert(`${dish.name} added to your order!`)
    }

Answer 2

你可以试试

async handleClick(dish) {
  this.props.addOrder(dish)
  localStorage.setItem("order", this.props.order)
  alert(`${dish.name} added to your order!`)
}

或

handleClick = async(dish) => {
  this.props.addOrder(dish)
  localStorage.setItem("order", this.props.order)
  alert(`${dish.name} added to your order!`)
}

Answer 3

你已经在 settings.json 中尝试过这个

“javascript.validate.enable”：真