HTMLInputElement: pattern property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. Itβs been available across browsers since β¨July 2015β©.
The pattern property of the HTMLInputElement interface represents a regular expression a non-null <input> value should match. It reflects the <input> element's pattern attribute.
The pattern property is valid for text, search, url, tel, email, and password types. It defines a regular expression that the input's value must match in order for the value to pass constraint validation.
If a non-null value doesn't conform to the constraints set by the pattern value, the ValidityState object's read-only patternMismatch property will be true.
Value
A string.
Examples
js
const inputElement = document.getElementById("year");
console.log(input.pattern);
Specifications
| Specification |
|---|
| HTML # dom-input-pattern |
Browser compatibility
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See also
<input>HTMLInputElement.value- Client-side validation
:validand:invalidpseudo-classes