Check if an element exists in JavaScript

element-test.js

/**
 * Check to see if an element exists in the page
 * Avoids potential XSS attack outlined in https://eamann.com/tech/jquery-xss/
 * @see https://eamann.com/tech/jquery-xss/
 */
function doesElementExist( el ) {
	try {
		var tmpLen = document.querySelectorAll( el ).length;
		if ( 0 < tmpLen ) {
			return true;
		} else {
			/*console.log( 'Element was not found' );*/
			return false;
		}
	} catch( e ) {
		/*console.log( 'Element threw an error: ' );
		console.log( e );*/
		return false;
	}
	/*console.log( 'No idea what happened, but no element was returned' );*/
	return false;
}