vue3 hooks函数示例

以ant-design-vue 2.2.8版Upload上传组件为例：

官方示例代码---封装前

<template>
  <a-upload
    v-model:file-list="fileList"
    name="file"
    :multiple="true"
    action="https://www.mocky.io/v2/5cc8019d300000980a055e76"
    :headers="headers"
    @change="handleChange"
  >
    <a-button>
      <upload-outlined></upload-outlined>
      Click to Upload
    </a-button>
  </a-upload>
</template>
<script>
import { message } from 'ant-design-vue';
import { UploadOutlined } from '@ant-design/icons-vue';
import { defineComponent, ref } from 'vue';
export default defineComponent({
  components: {
    UploadOutlined,
  },

  setup() {
    const handleChange = info => {
      if (info.file.status !== 'uploading') {
        console.log(info.file, info.fileList);
      }

      if (info.file.status === 'done') {
        message.success(`${info.file.name} file uploaded successfully`);
      } else if (info.file.status === 'error') {
        message.error(`${info.file.name} file upload failed.`);
      }
    };

    const fileList = ref([]);
    return {
      fileList,
      headers: {
        authorization: 'authorization-text',
      },
      handleChange,
    };
  },
});
</script>

使用hooks函数封装后

<template>
  <a-upload
    v-model:file-list="fileList"
    name="file"
    :multiple="true"
    action="https://www.mocky.io/v2/5cc8019d300000980a055e76"
    :headers="headers"
    @change="handleChange"
  >
    <a-button>
      <upload-outlined></upload-outlined>
      Click to Upload
    </a-button>
  </a-upload>
</template>
<script>
import { UploadOutlined } from '@ant-design/icons-vue';
import { defineComponent } from 'vue';
// hook
import useUpload from '../hooks/useUpload';
export default defineComponent({
  components: {
    UploadOutlined,
  },

  setup() {
    / 上传hooks
    const { fileList, headers, handleChange } = useUpload();
    return {
      fileList,
      headers,
      handleChange,
    };
  },
});
</script>

hooks函数

import { ref } from 'vue';
import { message } from 'ant-design-vue';
export default function useUpload() {
  const handleChange = (info) => {
    if (info.file.status !== 'uploading') {
      console.log(info.file, info.fileList);
    }
    
    if (info.file.status === 'done') {
      message.success(`${info.file.name} file uploaded successfully`);
    } else if (info.file.status === 'error') {
      message.error(`${info.file.name} file upload failed.`);
    }
  };
  
  const fileList = ref([]);
  return {
    fileList,
    headers: {
      authorization: 'authorization-text',
    },
    handleChange,
  };
}