Answers for "get iframes javascript"

iframe getelementbyid

document.getElementById('myframe1').contentWindow.document.getElementById('x')

how to get element in iframe using javascript

const iframe = document.getElementById("myIframe");

const iWindow = iframe.contentWindow;
const iDocument = iWindow.document;

// accessing the element
const element = iDocument.getElementsByTagName("p")[0];
element.style.color = "green";