designMode

• Description
• Syntax
• Examples
• Links

The designMode of Document for JS returns "on" if the document is editable, and "off" if it isn't.

Can be set, to change the document's current state. This focuses the document and resets the selection in that document.

document.designMode [ = value ]

• adoptNode
• body
• characterSet
• close
• compatMode
• contentType
• cookie
• createCDATASection
• createComment
• createDocumentFragment
• createElement
• createElementNS
• createProcessingInstruction
• createTextNode
• currentScript
• defaultView
• dir
• doctype
• Document
• documentElement
• documentURI
• domain
• embeds
• exitPictureInPicture
• forms
• getElementsByClassName
• getElementsByName
• getElementsByTagName
• getElementsByTagNameNS
• hasFocus
• head
• hidden
• images
• implementation
• importNode
• lastModified
• links
• location
• onreadystatechange
• onvisibilitychange
• open
• parseHTMLUnsafe
• pictureInPictureEnabled
• plugins
• readyState
• referrer
• scripts
• title
• URL
• visibilityState
• write
• writeln

• Web Hypertext Application Technology Working Group (WHATWG)