<html lang="en">
<head>
<title>Hide element inside iframe using javascript</title>
</head>
<body>
<p>Click on the <b>Hide Div</b> button to hide the div element inside the iframe.</p>
<button onclick="hideDiv()">Hide Div</button>
<iframe id="iframe-id" src="https://search.3schools.in/p/example.html" style="height:370px;width:100%"> </iframe>
<script>
function hideDiv() {
var myIframe = document.getElementById("iframe-id");
var divElement = myIframe.contentWindow.document.querySelector("#div");
divElement.style.display = "none";
}
</script>
</body>
</html>