The Input FileUpload object represents an HTML <input> element with type="file".
You can access an <input> element with type="file" by using getElementById():
チップ: You can also access <input type="file"> by searching through the elements collection of a form.
You can create an <input> element with type="file" by using the document.createElement() method:
|accept||Sets or returns the value of the accept attribute of the file upload button|
|autofocus||Sets or returns whether a file upload button should automatically get focus upon page load|
|defaultValue||Sets or returns the default value of the file upload button|
|disabled||Sets or returns whether the file upload button is disabled, or not|
|files||Returns a FileList object that represents the file or files selected with the file upload button|
|form||Returns a reference to the form that contains the file upload button|
|multiple||Sets or returns whether a user is allowed to select more than one file in the file upload field|
|name||Sets or returns the value of the name attribute of the file upload button|
|required||Sets or returns whether a file in the file upload field must be selected before submitting a form|
|type||Returns which type of form element the file upload button is|
|value||Returns the path or the name of the selected file|
The Input FileUpload object also supports the standard properties and events.
HTML tutorial: HTML Forms
HTML reference: HTML <input> tag
HTML reference: HTML <input> type attribute