Check if checkbox is checked with jQuery

Touching the essentials: jQuery selectors and methods

A unique identity using ID selectors

Use unique IDs assigned to the checkboxes to narrow down your selections for efficient handling:

$('#yourUniqueID').is(':checked');  // Checks checkbox status using an ID
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Name attribute as a savior

In the scenario where checkboxes lack unique IDs, utilize their name attribute for collective dealing:

$('input[name="groupOfCheckbox"]:checked');  // Targets by name
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Counting the rebels: The checked ones

Determining the number of checked boxes in a group? The .length property comes to the rescue:

var checkedCounter = $('[name="groupOfCheckbox"]:checked').length;  // Counts checked boxes
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.is(":checked"): Where to use and when?

A vigilant listener: The change event

Listening to the checkbox's story of changing state? Use the .on() method for an immediate reaction:

$('#checkbox-id').on('change', function() {
  if ($(this).is(':checked')) {
    // Gotcha! The checkbox betrayed its unchecked status.
  } else {
    // Tough luck! The checkbox remains a loyalist to the unchecked status.
  }
});
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A sly fox: Dynamically created checkboxes

For dynamically created checkboxes (the sly foxes), apply event delegation to attach listeners:

$(document).on('change', '#checkbox-id', function() {
  // Is the sly fox (changed checkbox) checked or not?
});
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Let CSS join the party!

Implement a CSS-JavaScript combo to reflect checkbox state changes. Trigger a flashy transition/animation upon box checking for enhanced UX!

Cut to the chase: Efficient selection tips

Efficiency is crucial. Always prefer concise jQuery selectors to avoid unnecessary traversals. The shorter, the better!