JavaScript - Array de objetos del formulario

<form>

	<input type="text" name="texto" required />

	<select name="lista" >

		<option>Uno</option>

		<option>Dos</option>

		<option>Tres</option>

	</select>

</form>

<script>

	elementos = document.querySelector('form').elements;

	for(elemento of elementos){

		if( elemento.required ){

			console.log('El elemento '+elemento.name+'es requerido.');

		}

	}

</script>