async wait 无法在可组合函数 vue 3 中工作

Question

在我的项目中，我有一个下载文件的功能。当点击按钮时，函数onDownload将被调用：import{useOnDownload}from"../../use/useOnDownload"setup(){...constloading=ref(null)onDownload=(id)=>{loading.value=idawaituseOnDownload(id)loadi

P粉071559609 · Answer

以下是如何使用 async wait 语法创建异步可组合函数

export default function useOnDownload() {
  const isLoading = ref(true);

  const onDownload = async () => {
    isLoading.value = true;
    try {
      const { data } = await axios.post('/api/download', {id: id}, 
     {responseType: 'blob'})
        // handle the response

    } catch (error) {
      console.log(error);
    } finally {
      isLoading.value = false;
    }
  };
   // invoke the function
  onDownload();

  return { // return your reactive data here };
}


import useOnDownload from "../../use/useOnDownload"
// no await in setup script or function 
const { reactiveDataReturned } = useOnDownload();

点击此处了解更多信息

P粉764003519 · Answer

我设法解决了另一种没有异步和等待的方法...

我将引用对象加载器传递给函数参数（作为可选）并从那里处理...

export function useOnDownload(id, loader) {
   if(loader !== undefined) {
     loader.value = id
   }
   axios.post('/api/download', {id: id}, {
      responseType: 'blob'
   }).then(response => {
     // handle the response
     ...
     if(loader !== undefined) {
       loader.value = null
     }
   }).catch(error => {
     // handle the error
     ...
     if(loader !== undefined) {
       loader.value = null
     }
   })
}