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Selection.containsNode

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The Selection.containsNode() method indicates if the node is part of the selection.

sel.containsNode(node, partialContainment)

node: The node that is being looked for in the selection.
partialContainment Optional: When true, containsNode() returns true when a part of the node is part of the selection. When false, containsNode() only returns true when the entire node is part of the selection. If not specified, the default value false is used.

 /* Check to see if anything inside the body element is selected */
 console.log(window.getSelection().containsNode(document.body, true));

Specification	Status	Comment
HTML Editing APIs The definition of 'Selection.containsNode()' in that specification.	Editor's Draft	Initial definition
Selection API The definition of 'Selection.containsNode()' in that specification.	Working Draft	Current

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	Yes	Yes	4 4 Before Firefox 35, the method didn't throw if `node` was `null`.	No	Yes	Yes
`partialContainment` parameter is optional	Yes	?	55	No	Yes	Yes

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	?	Yes	Yes	4 4 Before Firefox 35, the method didn't throw if `node` was `null`.	Yes	Yes	?
`partialContainment` parameter is optional	?	Yes	?	55	Yes	Yes	?