This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

The GlobalEventHandlers.onselectstart property represents the event handler that is called when a selectstart event reaches this object.


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


document.onselectstart = function() { console.log("Selection started!"); }; 


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

Browser compatibility

Feature Firefox (Gecko) Chrome Internet Explorer Opera Safari
Basic support 43 (43)[1] 1.0 4 ? 1.3
Feature Firefox Mobile (Gecko) Android IE Mobile Opera Mobile Safari Mobile
onselectionchange 43.0 (43)[1] ? ? ? ?

[1] This is implemented behind the dom.select_events.enabled preference, that default to false, except on Nightly.

See also


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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.

API Event Handler Experimental GlobalEventHandlers Property Reference