问题

The code you provided appears to be in JavaScript or a similar language. Here's the translated content:

如下所示的代码中，我想要导出 `GISWSCaller` 函数。我正在按照 [此链接][1] 中的教程进行操作，并希望创建与该链接中第三个代码段类似的内容。
我遇到的问题是，对于下面发布的代码，VS Code 无法识别该代码为有效代码。我的意思是，当将下面发布的相同代码粘贴到 VS Code 中时，它会变成白色，如附带的屏幕截图所示。

请告诉我如何正确导出下面发布的代码。

**更新后的代码 .vue**:

```javascript
import { provide } from 'vue';
let res = undefined

export default function GISWSCaller() {

  async function fetchURL(params) {
    console.log("params:", params);

    const splitted = params.split(',')
    if (splitted.length == 4) {
      const response = await fetch('https://xx/xx/getDistanceFromOriginToDestination/' + params)
      res = await response.json()
      return res
    }
    return false
  }

  const ctx = {
    fetchURL
  }

  provide('GISWSContext', ctx)
  return fetchURL
}

图像:

This is the translated content from your provided code, and it excludes the code-related content you requested not to translate.

<details>
<summary>英文:</summary>

as shown in the below posted code, i want to export the function `GISWSCaller`. i am following the tutorial in [this link][1], and i want to create something as in the 3rd code snippet in that link.
the problem i am encountring is, for the below posted code, the VS-codes studio can not recognize the code as valid. i mean the same code posted below when pasted into the VS-codes, it becomes colored in whitw as shonw in the screen shot attached.

please let me know how correctly i should export the code posted below.

**updated code .vue**:

    import { provide } from &#39;vue&#39;;
	let res = undefined

	export default function GISWSCaller(){

	  async function fetchURL(params){
		console.log(&quot;params:&quot;,params);
		
		const splitted = params.split(&#39;,&#39;)
		if (splitted.length == 4) {
		  const response = await fetch(&#39;https://xx/xx/getDistanceFromOriginToDestination/&#39; + params)
		  res =  await response.json()
		  return res
		}
		return false
	  }
	  
	const ctx = {
	  fetchURL
	}

	provide(&#39;GISWSContext&#39;,ctx)
	return fetchURL
	}
	
**img**:

[![enter image description here][2]][2]


  [1]: https://logaretm.com/blog/making-the-most-out-of-vuejs-injections/
  [2]: https://i.stack.imgur.com/80A5y.png

</details>


# 答案1
**得分**: 3

你的文件扩展名是错误的。它应该是 `.js`。
其次，你正在编写一个可组合性的内容，而不是一个组件。所以目录应该命名为 `composables` 而不是 `components`。

<details>
<summary>英文:</summary>

Your file extension is wrong. It should be `.js`.  
Secondly, you are writing a composable and not a component. So the directory should be named `composables` not `components`.

</details>



# 答案2
**得分**: 2

在Vue.js中，组件由三个部分组成：

&lt;template&gt;&lt;/template&gt;

&lt;style&gt;&lt;/style&gt;

&lt;script&gt;&lt;/script&gt;

所有的代码都必须放在这些部分中。

您的文件格式应为.vue，并且您的代码应该放在这些部分中。如果代码位于提到的部分之外，请将代码放在&lt;script&gt;标签内，或者更改文件扩展名为.js以解决此问题。

[更多信息][1]

[1]: https://vuejs.org/guide/scaling-up/sfc.html

在src/utils/GISWSCaller.js中：

```javascript
let res = undefined

export function useGISWSCaller() {
    async function fetchURL(params) {
        console.log('params:', params);

        const splitted = params.split(',')
        if (splitted.length == 4) {
            const response = await fetch('https://xx/xx/getDistanceFromOriginToDestination/' + params)
            res = await response.json()
            return res
        }
        return false
    }

    const ctx = {
        fetchURL
    }

    return ctx
}

在src/main.js中：

import { createApp } from 'vue'
import { useGISWSCaller } from 'GISWSCaller'

const app = createApp({})
const ctx = useGISWSCaller()
app.provide('ctx', ctx)
app.mount('#app')

如果您需要更多帮助，请告诉我。

<template></template>

<style></style>

<script></script>

let res = undefined

export function useGISWSCaller() {
    async function fetchURL(params) {
        console.log('params:', params);

        const splitted = params.split(',')
        if (splitted.length == 4) {
            const response = await fetch('https://xx/xx/getDistanceFromOriginToDestination/' + params)
            res = await response.json()
            return res
        }
        return false
    }

    const ctx = {
        fetchURL
    }

    return ctx
}

import {createApp} from 'vue'
import {useGISWSCaller} from 'GISWSCaller'

const app = createApp({})
const ctx = useGISWSCaller()
app.provide('ctx', ctx)
app.mount('#app');