How to Implement Datepickers on Dynamic Elements with jQuery?

Implementing jQuery datepicker() on Dynamically Created Elements

Many web applications require the use of dynamic elements, such as textboxes, that can be added or removed as needed. When adding date pickers to these dynamic elements, it is essential to understand how to handle this situation effectively.

The Challenge: Ineffective datepicker() Implementation

Suppose we have dynamically created multiple textboxes, each with a common class "datepicker_recurring_start." The goal is to enable each textbox to display a calendar upon clicking. However, using the following code only applies the datepicker functionality to the first textbox:

$(".datepicker_recurring_start" ).datepicker();

The Solution: Delegated Event Delegation

To address this issue, we leverage the power of event delegation, which allows us to attach event handlers to a static parent element, such as the document's body. The following code demonstrates this approach:

$('body').on('focus',".datepicker_recurring_start", function(){
    $(this).datepicker();
});

In this code:

• $('body') selects the document's body as the static parent element.
• on('focus': Registers an event listener for the 'focus' event.
• ".datepicker_recurring_start": Specifies that the event listener should be applied to descendants of the body that have the class "datepicker_recurring_start."
• function() {...}: Defines the event handler that initializes the datepicker instance for the current element.

This technique effectively attaches the datepicker functionality to all current and future elements with the "datepicker_recurring_start" class, ensuring that all dynamically created textboxes have the desired behavior.

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