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Input Number readOnly Property

Input Number Object Reference Input Number Object

Example

Set a number field to read-only:

document.getElementById("myNumber").readOnly = true;

The result will be:

Try it yourself »

Definition and Usage

The readOnly property sets or returns whether a number field should be read-only, or not.

A read-only field cannot be modified. However, a user can tab to it, highlight it, and copy the text from it.

This property reflects the HTML readonly attribute.

Tip: To prevent the user from interacting with the field, use the disabled property instead.


Browser Support

Internet Explorer Firefox Opera Google Chrome Safari

The readOnly property is supported in all major browsers.

Note: The <input type="number"> element is not supported in Internet Explorer 9 and earlier versions.


Syntax

Return the readOnly property:

numberObject.readOnly

Set the readOnly property:

numberObject.readOnly=true|false

Property Values

Value Description
true|false Specifies whether a number field should be read-only, or not
  • true - The number field is read-only
  • false - Default. The number field is not read-only

Technical Details

Return Value: A Boolean, returns true if the number field is read-only, otherwise it returns false

More Examples

Example

Find out if a number field is read-only or not:

var x = document.getElementById("myNumber").readOnly;

The result of x will be:

true
Try it yourself »

Related Pages

HTML reference: HTML <input> readonly attribute


Input Number Object Reference Input Number Object