JavaScript How to trigger check all checkboxes? trigger check checkbox jquery,trigger checkbox check,trigger checkbox check

I'm trying to figure out how to trigger a link button to trigger and change all checkboxes to checked when clicked upon. When I click the button, it will bring up the alert message, but not triggering the checkboxes. I've tried some answers listed in this site, but it doesn't work. I recreated the problem with a jsfiddle.

HTML:

<h3><a target='_blank' href="javascript:void(0);" id="checkAll">Check</a> All</h3>
<hr/>
<input class="categories" type="checkbox" name="filter" value="Math" checked>Math<br/>
<input class="categories" type="checkbox" name="filter" value="Science" checked>Science<br/>
<input class="categories" type="checkbox" name="filter" value="Reading" checked>Reading

JS:

$('#checkAll').click(function()
{
  alert("checkAll was clicked!");
  console.log("Checkboxes has been refilled!");
  $(':checkbox.categories').prop('checked', $(this).checked); // re-check all checkboxes
  //$("input:checkbox").prop('checked', $(this).prop("checked"));
});
Answer:1

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