pattern

Summary

The pattern attribute specifies a regular expression that the <input> element’s value is checked against.

Numeric field: <input type="text" name="numericField" pattern="[0-9]*" />
Country code: <input type="text" name="country_code" pattern="[A-Za-z]{3}" title="Three letter country code">

Notes

Remarks

Several generic messages are displayed for a variety of validation errors. If you use a title attribute on an input element, it will both be shown as alt text for the field, as well as be appended to the generic error message. The following example shows a ZIP code number format.

Syntax

Standards information

• HTML5 A vocabulary and associated APIs for HTML and XHTML, Section 4.10.7.3.9

See also

Related pages

• HTMLInputElementHTMLInputElement

Attributions

• Microsoft Developer Network: [Windows Internet Explorer API reference Article]