onBeforeLoad of ui.tree, Events Webix Docs
fires immediately before data loading has started
boolean onBeforeLoad();
| boolean | returning false will prevent data loading |
Example
mygrid.attachEvent("onBeforeLoad", function(){
webix.message("Loading...");
return true;
});
Related samples
Details
Returning false from the event handler will block further processing.
See also
API
Articles
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