"Select Multiple Checkbox In JavaScript "
Bootstrap 4.1.1 Snippet by Arjunverma

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<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<div class="container">
<div class="row">
<h2>Create your snippet's HTML, CSS and Javascript in the editor tabs</h2>
</div>
</div>
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function set() {
var intern = document.querySelectorAll('input[type="checkbox"]:checked');
var aIds = [];
for(var x = 0, l = intern.length; x < l; x++)
{
aIds.push(intern[x].value);
}
var str = aIds.join(', ');
console.log(str);
}
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