ChildNodesText
HTML
<div class="first-div">
<div class="second-div">
<div class="third-div">1</div>
<div class="third-divs-sibling">2</div>
</div>
</div>JavaScript
var xxx = document.getElementsByClassName('first-div')[0];
console.log(xxx.childNodes[ 1 ].childNodes[ 1 ]);
console.log(xxx.childNodes[ 1 ].childNodes[ 2 ]);