To get the last child of a parent element, you can use the lastElementChild property in the DOM element in JavaScript.
Let's say we have a parent element div and three paragragh tags inside it like this,
<div id="container">
<p>Paragraph 1</p>
<p>Paragraph 2</p>
<p>Paragraph 3</p>
</div>
Now let's get the last paragraph element from the div tag.
To get the last paragragh element, last we have to get a reference to the div tag and then use the lastElementChild property like this,
// get refernece to tht div tag
const div = document.querySelector("#container");
// ge the last child element
const lastChild = div.lastElementChild;
console.dir(lastChild); // last p tag properties and methods
See this example live in JSBin.
