Document.designMode

document.designMode controls whether the entire document is editable. Valid values are "on" and "off". According to the specification, this property is meant to default to "off". Firefox follows this standard. The earlier versions of Chrome and IE default to "inherit". Starting in Chrome 43, the default is "off" and "inherit" is no longer supported. In IE6-10, the value is capitalized.

Syntax

var mode = document.designMode;
document.designMode = value;

Value

A string indicating whether designMode is (or should be) set to on or off. Valid values are on and off.

Example

Make an <iframe>'s document editable:

iframeNode.contentDocument.designMode = "on";

Specifications

Specification
HTML Standard (HTML) # dom-document-designmode-dev

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`designMode`	1	12	1	4	9	1.2	1	18	4	10.1	1	1.0