how to copy content to clipboard in javascript

content-copy.js

function contentCopy(input,title){
    var r = document.createRange();
    r.selectNode(document.getElementById(input));
    window.getSelection().removeAllRanges();
    window.getSelection().addRange(r);
    document.execCommand('copy');
    window.getSelection().removeAllRanges();
    toastr['success']( '@lang("Copied to clipboard!")',title); // optional bonus
}

$(document.body).on('click', '.js-copy-shortcut', function() {
    contentCopy($(this).data('id'), $(this).data('value'));
});