Input URL pattern Property

Get the value of the pattern attribute of a URL field:

var x = document.getElementById("myURL").pattern;

Description

The pattern property sets or returns the value of the pattern attribute of a URL field.

The pattern attribute specifies a regular expression that the URL field's value is checked against.

Tip: Use the global HTML title attribute or the DOM title property to describe the pattern to help the user.

Tip: Learn more about Regular Expressions in our JavaScript Tutorial.

Tip: Also see our Complete JavaScript RegExp Reference.

Property
pattern	Yes	10.0	Yes	Not supported	Yes

Return the pattern property:

urlObject.pattern

Set the pattern property:

urlObject.pattern = regexp

Value	Description
regexp	Specifies a regular expression that the URL field's value is checked against

Return Value:	A String, representing a regular expression

Set the pattern of a URL field to only accept URL's that start with http(s)://www.facebook.com/:

document.getElementById("myURL").pattern = "http://www\.facebook\.com\/(.+)|https://www\.facebook\.com\/(.+)";