beforeShow
fires before a control is shown
beforeShow: (value: string | string[]) => boolean | void;
Parameters:
value: string | string[]
- the id(s) of the item(s) from data collection that are currently selected in the control
Returns:
Return false
to prevent a control from being shown; otherwise, true
.
Example
form.getItem("combo").events.on("beforeShow", function(value) {
console.log("beforeShow", value);
return true;
});
Change log:
added in v7.0