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";
document.designMode = "off";

Example

Make an <iframe>'s document editable:

iframeNode.contentDocument.designMode = "on";

Specifications

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

Browser compatibility

See also

• Rich-Text Editing in Mozilla
• HTMLElement.contentEditable
• designMode property on MSDN