No jQuery
by dfg312546
HTML
<h1 class="title">
Make me green
</h1>
<p class="para">
Make me red
</p>
<p class="para">
Me red too
</p>
<p class="para">
Also me
</p>
JavaScript
document.querySelector('.title').style.color = 'green';
const paras = document.querySelectorAll('.para');
paras.forEach(para => {
para.style.color = 'red';
});