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90 lines
5.0 KiB
Markdown
90 lines
5.0 KiB
Markdown
---
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category: Components
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type: Data Entry
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title: Upload
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---
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Upload file by selecting or dragging.
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## When To Use
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Uploading is the process of publishing information (web pages, text, pictures, video, etc.) to a remote server via a web page or upload tool.
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- When you need to upload one or more files.
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- When you need to show the process of uploading.
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- When you need to upload files by dragging and dropping.
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## API
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| Property | Description | Type | Default | Version |
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| --- | --- | --- | --- | --- |
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| accept | File types that can be accepted. See [input accept Attribute](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/file#accept) | string | - | |
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| action | Uploading URL | string\|(file) => `Promise` | - | |
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| method | http method of upload request | string | 'post' | |
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| directory | support upload whole directory ([caniuse](https://caniuse.com/#feat=input-file-directory)) | boolean | false | |
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| beforeUpload | Hook function which will be executed before uploading. Uploading will be stopped with `false` or a rejected Promise returned. **Warning：this function is not supported in IE9**。 | (file, fileList) => `boolean | Promise` | - | |
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| customRequest | override for the default xhr behavior allowing for additional customization and ability to implement your own XMLHttpRequest | Function | - | |
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| data | Uploading extra params or function which can return uploading extra params. | object\|function(file) | - | |
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| defaultFileList | Default list of files that have been uploaded. | object\[] | - | |
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| disabled | disable upload button | boolean | false | |
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| fileList | List of files that have been uploaded (controlled). Here is a common issue [#2423](https://github.com/ant-design/ant-design/issues/2423) when using it | object\[] | - | |
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| headers | Set request headers, valid above IE10. | object | - | |
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| listType | Built-in stylesheets, support for three types: `text`, `picture` or `picture-card` | string | 'text' | |
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| multiple | Whether to support selected multiple file. `IE10+` supported. You can select multiple files with CTRL holding down while multiple is set to be true | boolean | false | |
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| name | The name of uploading file | string | 'file' | |
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| previewFile | Customize preview file logic | (file: File \| Blob) => Promise<dataURL: string> | - | |
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| showUploadList | Whether to show default upload list, could be an object to specify `showPreviewIcon`, `showRemoveIcon` and `showDownloadIcon` individually | Boolean or { showPreviewIcon?: boolean, showDownloadIcon?: boolean, showRemoveIcon?: boolean } | true | |
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| supportServerRender | Need to be turned on while the server side is rendering | boolean | false | |
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| withCredentials | ajax upload with cookie sent | boolean | false | |
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| openFileDialogOnClick | click open file dialog | boolean | true | |
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| onChange | A callback function, can be executed when uploading state is changing, see [onChange](#onChange) | Function | - | |
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| onPreview | A callback function, will be executed when file link or preview icon is clicked | Function(file) | - | |
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| onRemove | A callback function, will be executed when removing file button is clicked, remove event will be prevented when return value is `false` or a Promise which resolve(false) or reject | Function(file): `boolean | Promise` | - | |
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| onDownload | Click the method to download the file, pass the method to perform the method logic, do not pass the default jump to the new TAB. | Function(file): void | Jump to new TAB | |
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| transformFile | Customize transform file before request | Function(file): `string | Blob | File | Promise<string | Blob | File>` | - | |
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### onChange
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> The function will be called when uploading is in progress, completed or failed.
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When uploading state change, it returns:
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```js
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{
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file: { /* ... */ },
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fileList: [ /* ... */ ],
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event: { /* ... */ },
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}
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```
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1. `file` File object for the current operation.
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```js
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{
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uid: 'uid', // unique identifier, negative is recommend, to prevent interference with internal generated id
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name: 'xx.png', // file name
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status: 'done', // options：uploading, done, error, removed
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response: '{"status": "success"}', // response from server
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linkProps: '{"download": "image"}', // additional html props of file link
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xhr: 'XMLHttpRequest{ ... }', // XMLHttpRequest Header
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}
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```
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2. `fileList` current list of files
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3. `event` response from server, including uploading progress, supported by advanced browsers.
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## FAQ
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### How to implement upload server side?
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- You can consult [jQuery-File-Upload](https://github.com/blueimp/jQuery-File-Upload/wiki#server-side) about how to implement server side upload interface.
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- There is a mock example of [express](https://github.com/react-component/upload/blob/master/server.js) in rc-upload.
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### I want to display download links.
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Please set property `url` of each item in `fileList` to control content of link.
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### How to use `customRequest`?
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See <https://github.com/react-component/upload#customrequest>.
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