Input Text pattern Property

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

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

Description

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

The pattern attribute specifies a regular expression that the text 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:

textObject.pattern

Set the pattern property:

textObject.pattern = regexp

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

Return Value:	A String, representing a regular expression

Set the pattern of a text field to only contain numbers from 1 to 3:

document.getElementById("myText").pattern = "[1-3]";