required

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required

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W3C Candidate Recommendation

Summary

The required attribute is a boolean attribute. When present, it specifies that an input field must be filled out before submitting the form.


Applies to HTMLInputElement


Compatibility

There is no data available for topic "html", feature "required". If you think that there should be data available, consider opening an issue.

Examples

A required input field

HTML

Username: <input type="text" name="username" required>

Notes

Remarks

The attribute can be set on text, text area, URL, email, select, checkbox, or radio button elements. It is a Boolean attribute and needs to be specified only on an element. When users hover the mouse over a required field, they’ll see a tool tip stating that it is a required field. The following example shows the validation attribute on a text input field.

Syntax

Standards information


See also

Related pages (MSDN)

Attribution

This article contains content originally from external sources.

Portions of this content come from the Microsoft Developer Network: [Windows Internet Explorer API reference Article]