pattern attribute | pattern property
Gets or sets a string containing a regular expression that the user's input must match.
This property is read/write.
  |
Syntax
| HTML |
|---|
<element pattern="ptr" ... > |
| JavaScript |
|---|
object.pattern = ptr ptr = object.pattern |
Property values
Type: DOMString
String containing the regular expression used to match user input.
Standards information
- HTML5 A vocabulary and associated APIs for HTML and XHTML, Section 4.10.7.3.9
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.
<p><label>*Zip: <input type="text" pattern= "[0-9](5|10)" placeholder="5 or 9 digit zip" title="5 or 9 digit zip" required /></label></p>
See also
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Build date: 11/28/2012
