MutationObserverInit.characterData

The MutationObserverInit dictionary's optional characterData property is used to specify whether or not to monitor the node or nodes being observed for changes to their textual contents.

Character data changes are detectable on any text node, including nodes based on the Text, ProcessingInstruction, and Comment interfaces.

Syntax

var options = {
  characterData: true | false
}

Value

A Boolean value indicating whether or not to call the observer's callback function when textual nodes' values change.

If true, the callback specified when observe() was used to start observing the node or subtree is called any time the contents of a text node are changed.

You can expand the capabilities of attribute mutation monitoring using other options:

  • characterDataOldValue lets you specify whether or not you want the previous value of changed text nodes to be provided using the MutationRecord's oldValue property.
  • subtree lets you specify whether to watch the target node and all of its descendants (true), or just the target node (false).

If you set characterDataOldValue to true, characterData is automatically assumed to be true, even if you don't expressly set it as such.

Example

Specifications

Specification Status Comment
DOM
The definition of 'MutationObserverInit.characterData' in that specification.
Living Standard  

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support 26
Full support 26
No support 18 — 26
Prefixed
Prefixed Requires the vendor prefix: webkit
Edge Full support YesFirefox Full support 14
Notes
Full support 14
Notes
Notes Starting in Firefox 36, characterData has no default value; previously, its default value was false.
IE Full support 11Opera Full support 15Safari Full support 7
Full support 7
No support 6 — 7
Prefixed
Prefixed Requires the vendor prefix: webkit
WebView Android ? Chrome Android Full support 26
Full support 26
No support 18 — 26
Prefixed
Prefixed Requires the vendor prefix: webkit
Edge Mobile ? Firefox Android Full support 14
Notes
Full support 14
Notes
Notes Starting in Firefox 36, characterData has no default value; previously, its default value was false.
Opera Android Full support 15Safari iOS Full support 7
Full support 7
No support 6 — 7
Prefixed
Prefixed Requires the vendor prefix: webkit
Samsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
See implementation notes.
See implementation notes.
Requires a vendor prefix or different name for use.
Requires a vendor prefix or different name for use.

 

Document Tags and Contributors

Contributors to this page: Sheppy
Last updated by: Sheppy,