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Editorial Team
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Asked: 2026-06-17T08:32:26+00:00

I’ve been doing some research on jQuery’s Datepicker plugin. I was curious as to

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I’ve been doing some research on jQuery’s Datepicker plugin. I was curious as to how he created his nodes and modified them.

What I found was interesting:

@ 113:   this.dpDiv = bindHover($('<div id="' + this._mainDivId + '" class="ui-datepicker ui-widget ui-widget-content ui-helper-clearfix ui-corner-all"></div>'));

The bindHover function is not really important to consider, it takes the reference and delegates a few events such as mouseover etc.

What is interesting is the id attribute, it says this._mainDivId so I checked it out and…

@ 34:       this._mainDivId = 'ui-datepicker-div'; // The ID of the main datepicker division

There is not use of a unique id, it is a set id. I figured it would have to be unique because often times there are more than one datepickers used on a page.

This is jQuery, it MUST be good practice… I just can’t figure out why or how this is helpful.

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1 Answer

  1. Editorial Team

    Glancing at the source, it looks like though there may be many datepicker instances on a page, only one datepicker window is open at a time (see example). Every datepicker uses the same dpDiv element to show its content, so that div is given a single unique ID.

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