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document.onselectionchange

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

The Document.onselectionchange property represents the event handler that is called when a selectionchange event reaches this object.

obj.onselectionchange = function;

function is the name of a user-defined function, without the () suffix or any parameters, or an anonymous function declaration.

document.onselectionchange = function() { console.log("Selection changed!"); };

Specification	Status	Comment
Selection API The definition of 'Document.onselectionchange' in that specification.	Working Draft	Initial definition.

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	49	Yes	45 Disabled 45 Disabled Flag not necessary on Nightly Disabled From version 45: this feature is behind the `dom.select_events.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	?	?	?

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	49	49	Yes	45 Disabled 45 Disabled Flag not necessary on Nightly Disabled From version 45: this feature is behind the `dom.select_events.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	?	?	?