param	type	default	description
mode	String	'json'	'json' or 'base64'
getData	Function	null	a function which get data and return a promise
handleError	Function	null	a function which handle error

examples

You can use DownloadExcel as a vue component anywhere like this:

<download-excel
    :mode="mode"
    :get-data="() => getDownloadData()"
    :handle-error="err =>handleDownloadError(err)"
    @loading="val => isLoading = val"
>
    <el-button
        class="btn-icon"
        :icon="isLoading ? 'el-icon-loading' : 'el-icon-download'"
    ></el-button>
</download-excel>

For more usage, please check demo-source-code