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 = "on" || "off";

Example

Make an <iframe>'s document editable:

iframeNode.contentDocument.designMode = "on";

Specifications

Specification	Status	Comment
HTML Living Standard The definition of 'designMode' in that specification.	Living Standard	Initial definition.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`designMode`	Chrome Full support 45 Notes Full support 45 Notes Notes Before Chrome 64, this property was accessed through the `HTMLDocument` alias.	Edge Full support 12	Firefox Full support Yes	IE Full support Yes	Opera Full support Yes	Safari Full support Yes	WebView Android Full support 45 Notes Full support 45 Notes Notes Before Chrome 64, this property was accessed through the `HTMLDocument` alias.	Chrome Android Full support 45 Notes Full support 45 Notes Notes Before Chrome 64, this property was accessed through the `HTMLDocument` alias.	Firefox Android ?	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android ?

Legend

Full support: Full support
Compatibility unknown: Compatibility unknown
See implementation notes.: See implementation notes.