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replaceChild CODE
To replace an HTML element, the element.
replaceChild
(newNode, oldNode) method is used. JS
window.onload = function() {
    let p = document.createElement("p");
    p.innerHTML = "This is new";

    // Replaces the first p with the new one
    let parent = document.getElementById("demo");
    parent.replaceChild(p, document.getElementById("p1"));
};
HTML
<div id="demo">
	<p id="p1">This is a paragraph.</p>
	<p id="p2">This is another paragraph.</p>
</div>
Note: The code above creates a new paragraph element that replaces the existing 
p1
paragraph
by Valeri Tandilashvili
4 years ago
JavaScript
DOM
3
Pro tip: use ```triple backticks around text``` to write in code fences