docs_vue2/one/docs/en-US/components/uploader.md

Uploader

Demos

File upload

Set the type prop to file to use the file upload mode.

Image upload

Set the type prop to image to use the image upload mode.

API

Props

Name	Type	Default	Description
ui	string=	-	[^ui]
type	string	'file'	[^type]
value	`Object	Array	-
key-field	string	'key'	Used to specify a unique key for the file object, as a basis for correctly handling the order of the file list when the data changes.
name	string	'file'	The name of native <input> elements.
action	string	-	Upload URL.
headers	Object	uploader.headers	Extra HTTP headers. Can be globally configured.
with-credentials	boolean	true	The same as the withCredentials option of XMLHttpRequest.
request-mode	string	uploader.requestMode	[^request-mode]
iframe-mode	string	uploader.iframeMode	[^iframe-mode]
callback-namespace	string	uploader.callbackNamespace	The namespace of the callback function when request-mode is 'iframe' and iframe-mode is 'callback', will be placed under the window object. Can be globally configured.
data-type	string	'json'	[^data-type]
convert-response	uploader.convertResponse	-	[^convert-response]
accept	string	-	The same as the accept attribute of native <input> elements. Works as an extra layer of validation on top of browsers' file filter. Will skip validation when MIME type doesn't match file extension, eg. application/msword.
max-count	number	-	The maximum file count.
max-size	`number	string`	-
payload	Object	-	The extra data payload to be sent together with the file.
progress	string	'text'	[^progress]
autoupload	boolean	true	Whether to start upload as soon as a file is selected.
order	string	asc	[^order]
upload	function(Object, Object): function	-	[^upload]
controls	function(Object, Array<Object>): Array<Object>	-	[^controls]

^^^ui Style variants.

+++Enum values

Value	Description
s	Small.
m	Medium.
+++
^^^

^^^type The type of the uploader.

+++Enum values

Value	Description
file	File upload.
image	Image upload.
+++
^^^

^^^value Returns an array of file objects when multiple is true. When max-count is set to a value greater than 1, then multiple treated as true.

The type of single file is {name: string, src: string, ...}, and fields added inside convert-response. +++ ^^^

^^^request-mode The request mode of the uploader. Can be globally configured.

+++Enum values

Value	Description
xhr	Upload with XMLHttpRequest.
iframe	Upload with <iframe>.
+++
^^^

^^^iframe-mode To specify the callback mode when request-mode is iframe. Can be globally configured.

+++Enum values

Value	Description
postmessage	Callback with PostMessage.
callback	Callback with callback functions registered according to callback-namespace on window.
+++
^^^

^^^data-type To specify the data type in order to parse the callback value if it's text content. Can be left empty if callback value is Object.

+++Enum values

Value	Description
json	The callback text is JSON.
text	The callback text is plain text.
+++
^^^

^^^convert-response Converts response data to standard format that can be consumed by the uploader, in order to allow the uploader to display upload result. The parameter is the callback data. The type of the return value must conform to the following:

+++Properties

Property	Type	Description
success	boolean	Whether the upload succeeded.
name	string=	The name of the file. Required when success is true.
src	string=	The location of the file. Required when success is true.
message	string=	Error message when upload fails. Required when success is false.

Additional fields can be added to the response data. These data fields will be included in the value prop and parameter of callbacks change, success, failure, remove and progress events. Can be globally configured. +++ ^^^

^^^progress To specify how to display progress when request-mode is xhr.

+++Enum values

Value	Description
text	Displays as status text.
number	Displays the progress as percentage.
bar	Displays th progress as a progress bar.
+++
^^^

^^^order The order of displaying uploaded files according to start time.

+++Enum values

Value	Description
asc	Ascending order.
desc	Descending order.
+++
^^^

^^^upload Customizing the upload process in case the value of request-mode is 'custom', the first parameter is the native File object and the second parameter is the object that contains callback functions associated with the upload process, with the following properties.

+++Properties

Property	Type	Description
onload	function	The upload completion callback function whose arguments is the same as the convert-response prop's return value.
onprogress	function	The callback function for upload progress, the parameter type being { loaded: number, total: number }, loaded is the number of bytes that have been uploaded, and total is the total number of bytes in the file.
oncancel	function	The callback to the component when the custom upload is actively cancelled, no parameters.
onerror	function	The callback for upload error, the parameter type is { message: string } and message is the error message.

If upload returns a function, it will be called when the user cancelled proactively or the upload component is destroyed, to abort the custom upload process. ^^^

^^^controls In image upload mode, it is used to customize the actions on the floating toolbar. The parameter types are (file: Object, defaultControls: Array<Object>), where file is the file related information and defaultControls is the array containing the default actions. It can return an array of different actions depending on the file state. The specific properties for each action item are as follows.

+++Properties

Property	Type	Description
name	string	The name of the action item. When the button is clicked, an event with the same name will be emitted, with (file: Object, index: number) as the callback parameter, file is the file object that triggered the event, and index is the number of the file in the list.
icon	string	The icon of the action item.
disabled	boolean=	Whether the action item is disabled. If this property is undefined, the disabled state of the action item follows the disabled state of the component.
^^^

Slots

Name	Description
button-label	[^button-label]
upload	The area of the upload button in image upload mode.
desc	The content of the prompt for the number, format, size, etc. of files.
file	[^file]
file-before	The area before the contents of a single file. The scope argument is the same as the file slot.
file-after	The area after the contents of a single file. The scope argument is the same as the file slot.
uploading	The area of a single image being uploaded in image upload mode. The scope argument is the same as the file slot.
failure	The area of a single image that failed to upload in image upload mode. The scope argument is the same as the file slot.

^^^button-label The content in the upload button.

Default content: file upload for prompt to select a file, and image upload for upload image icon. ^^^

^^^file Single file area to customize the file content.

+++Slot props

name	type	description
name	string	The name of the file.
src	string	The address of the file.
status	string	The status of the file. 'success' means the upload was successful; 'uploading' means the upload is in progress; 'failure' means the upload failed.
index	number	The number of the file in the list.
+++
^^^

Events

Name	Description
change	[^event-change]
remove	[^event-remove]
success	Triggers when upload succeeded. Shares the same callback parameter list with the remove event.
failure	Triggers when upload failed. Shares the same callback parameter list with the remove event.
invalid	[^event-invalid]
statuschange	[^event-statuschange]
progress	[^event-progress]

^^^event-change Triggers when upload succeeded or a file is removed. The callback parameter list is (value).

+++Parameters

Name	Type	Description
value	`Object	Array
+++
^^^

^^^event-remove Triggered when a file is removed. The callback parameter list is (file, index).

+++Parameters

Name	Type	Description
file	Object	The removed file object.
index	number	The index of the removed file.

file properties

Name	Type	Description
name	string	The name of the file.
src	string	The location of the file.
status	string	The status of the upload process. Can be one of 'success' / 'uploading' / 'failure'.

Fields added from convert-response are also available. +++ ^^^

^^^event-invalid Triggered when file validation fails. The callback parameter list is (validity: Object).

+++Parameter properties

Name	Type	Description
file	Object	The information about the file that failed the validation, being the same type as file in the callback parameter of the remove event. This property is empty if the validation fails because the number of files selected exceeds the max-count limit.
errors	Array<Object>	Array of all the validation error messages of the file, each item in it is an object that contains validation failure information.
+++

+++Validation error properties

Name	Type	Description
type	string	The type of validation error, whose enum value can be accessed from the Uploader.errors object, eg. Uploader.errors.SIZE_INVALID.
value	`number	string
message	string	The validation error message.
+++

+++Relationship between validation failure types and parameters

type	description	value type	value description
TYPE_INVALID	File type validation failure.	string	File name.
SIZE_INVALID	File size validation failure.	number	File size in bytes.
TOO_MANY_FILES	The number of selected files exceeds the max-count limit.	number	Number of files selected.
CUSTOM_INVALID	Custom validation failure returned by validator prop.	Object	File object, same as remove event callback parameter.
+++
^^^

^^^event-statuschange Triggered when the status of the entire uploader changes. The callback parameter list is (status: string).

+++Values

Value	Description
empty	No file is selected.
uploading	At least one file is being uploaded.
failure	Any file is not being successfully uploaded.
success	All files are successfully uploaded.
+++
^^^

^^^event-progress Triggered when upload progress updated, when request-mode is 'xhr'. The callback parameter list is (file, index, event).

+++Parameters

Name	Type	Description
file	Object	Same as the file parameter of the callback for the remove event.
index	number	The index of the file being uploaded.
event	Event	Native upload progress event object.
+++
^^^

Configs

Key	Type	Default	Description
uploader.requestMode	string	'xhr'	Same as the request-mode prop.
uploader.iframeMode	string	'xhr'	Same as the iframe-mode prop.
uploader.callbackNamespace	string	'veuiUploadResult'	Same as the callback-namespace prop.
uploader.headers	Object	-	Same as the headers prop.
uploader.convertResponse	function(Object): Object	-	Same as the convert-response prop.

Icons

Name	Description
upload	Upload file.
clear	Remove file.
success	Upload succeeded.
redo	Retry upload.
file	File.
add	Add file.
alert	Validation failure alert.