## Upload Upload files by clicking or drag-and-drop ### Click to upload files :::demo Customize upload button type and text using `slot`. ```html

Click to upload

jpg/png files with a size less than 500kb

``` ::: ### Drag to upload You can drag your file to a certain area to upload it. :::demo Specifying the `type` attribute as `drag` will change the upload control to a drag-and-drop style. Additionally, you can use the `multiple` attribute to control whether uploading multiple files is permitted. `on-preview` and `on-remove` are hook functions that will be called after clicking on the uploaded file link and after clicking to remove the uploaded file, respectively. ```html

Drop file here or click to upload

jpg/png files with a size less than 500kb

``` ::: ### Upload single image This mode is specifically for image uploading, and the thumbnail will display in the origin place. :::demo `thumbnail-mode` attribute allows you to force the upload content to image only, and can display the thumbnail of the uploaded image. ```html

Drop file here or click to upload

jpg/png files with a size less than 500kb

``` ::: ### Attributes Attribute | Description | Type | Accepted Values | Default ----| ----| ----| ----| ---- action | required, request URL | string | — | — headers | request headers | object | — | — multiple | whether uploading multiple files is permitted | boolean | — | — data | additions options of request | object | — | — name | key name for uploaded file | string | — | file with-credentials | whether cookies are sent | boolean | — |false show-upload-list | whether to show the uploaded file list | boolean | — | true type | type of Upload | string | select/drag | select accept | accepted [file types](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input#attr-accept), will not work when `thumbnail-mode` is `true` | string | — | — on-preview | hook function when clicking the uploaded files | function(file) | — | — on-remove | hook function when files are removed | function(file, fileList) | — | — on-success | hook function when uploaded successfully | function(response, file, fileList) | — | — on-error | hook function when some errors occurs | function(err, response, file) | — | — before-upload | hook function before uploading with the file to be uploaded as its parameter. If `false` or a `Promise` is returned, uploading will be aborted | function(file) | — | — thumbnail-mode | whether thumbnail is displayed | boolean | — | false default-file-list | default uploaded files, i.e: [{name: 'food.jpeg', url: 'https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg?imageMogr2/thumbnail/360x360/format/webp/quality/100'}] | array | — | [] ### Events | Event Name | Description | Parameters | |---------- |-------- |---------- | | clearFiles | clear the uploaded file list | — |