<input type="password" id="password">
<span id="warning" style="display:none;color:#c00">[Caps Lock]</span>
<script>
document.getElementById("password").addEventListener("keyup", function(event) {
  document.getElementById("warning").style.display = (event.getModifierState("CapsLock")) ? "inline" : "none";
});
</script>

Here for me to copy/paste as-needed… feel free to do the same 💁‍♂️

Vanilla JavaScript

var inputs=document.getElementsByTagName('input');for(var i=0;i<inputs.length;i++){if(inputs[i].type=='checkbox'){inputs[i].checked=true;}}

jQuery Equivalent

$('input:checkbox').prop('checked',true);

Happy coding 😀

Here is a quick function I created to merge multiple arrays and sum or concatenate the values thereof. If the values are numeric they will be added together (sum). Otherwise the values will be appended to each other (concatenation).

function arrayMergedSumConcat() {
	$out = array();

	$num_args = func_num_args();
	
	$arg_list = func_get_args();
	
	for ($i = 0; $i < $num_args; $i++) { $in = $arg_list[$i]; foreach ($in as $key => $value) {
			if (isset($out[$key])) {
				if (is_numeric($in[$key]) && is_numeric($out[$key])) {
					$out[$key] += $in[$key];
				} else {
					$out[$key] .= $in[$key];
				}
			} else {
				$out[$key] = $in[$key];
			}
		}
	}
	
	return $out;
}