HTML DOM FileUpload object
FileUpload object
In HTML documents, a FileUpload object is created for every time a label appears.
The element contains a text input field for entering the file name and a button to open the file selection dialog box to graphically select the file.
The value property of the element holds the name of the file specified by the user, but when a form containing a file-upload element is submitted, the browser sends the contents of the selected file to the server, not just the file name.
For security reasons, the file-upload element does not allow the HTML author or JavaScript programmer to specify a default file name. T he HTML value property is ignored, and for such elements, the value property is read-only, which means that only the user can enter a file name. When the user selects or edits a file name, the file-upload element triggers the onchange event handle.
You can access the FileUpload object by traversing the form's array of elements, or by using document.getElementById().
FileUpload object properties
W3C: W3C standard.
| Attributes | describe | W3C |
|---|---|---|
| disabled | Set or return to whether the fileUpload object is disabled. | Yes |
| accept | Set or return a list of MIME types that indicate file transfer (comma separation). | Yes |
| form | Returns a reference to a form containing the fileupload object. | Yes |
| name | Set or return the name of the fileupload object. | Yes |
| type | Returns the type of a table element.For FILEUPLOAD, it is "file". | Yes |
| value | Returns the file name of the fileupload object after the text is set by the user. | Yes |
Standard properties and events
FileUpload objects also support standard properties and events.