Find out if a file must be selected/uploaded before submitting a form:
The result of x will be:
The required property sets or returns whether a file in the file upload field must be selected/uploaded before submitting a form.
This property reflects the HTML required attribute.
The required property is supported in all major browsers, except Internet Explorer 9 and earlier versions, and Safari.
Return the required property:
Set the required property:
| Value | Description |
|---|---|
| true|false |
Specifies whether a file upload
field should be a required part of form submission.
|
| Return Value: | A Boolean, returns true if the file upload field is a required part of form submission, otherwise it returns false |
|---|
Set a file upload field to be a required part of form submission:
HTML reference: HTML <input> required attribute
Input FileUpload Object
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