Select All Checkboxes By ID/Class

Question

I\'m really bad at Javascript and I\'m struggling to get my head round it.

What I\'m trying to do is get something to select all checkboxes. However everything I have fo

Answer 1

Javascript

By class:

var clist=document.getElementsByClassName("MyClass");
for (var i = 0; i < clist.length; ++i) { clist[i].checked = "checked"; }

By ID:

var clist=document.getElementById("MyID");
for (var i = 0; i < clist.length; ++i) { clist[i].checked = "checked"; }

See also: Loop Over querySelectorAll Matches.

jQuery

By class:

$('.myclass:input:checkbox').each(function() { this.checked = true; });

By ID:

$('#myID:input:checkbox').each(function() { this.checked = true; });

Related: How to reset all checkboxes using jQuery or pure JS?