jQuery-ui小部件已呈现

Question

How to check if a jQuery-ui widget is rendered or not (version 1.11.2)? To avoid Uncaught Error: cannot call methods on xxxx prior to initialization; attempted to call method 'xxxx' Uncaught Error: cannot call methods on xxxx prior to initialization; attempted to call method 'xxxx' errors.

Answer 1

One way is to use the data api like

If your widget name is datepicker and the element id is date then

if($('#date').data('datepicker')){
    //call method since it is initialized
}

Demo: Fiddle

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The same can be done via the :data() selector

if ($('#date').is(':data(datepicker)')) {
    //call method since it is initialized
}