JSFiddle - React, Tailwind, and code Playground

HTML

<iframe id="frame1" src="https://www.google.com/" style="width: 500px; height: 300px; padding: 0px; border: 2px;"/>

CSS

.frame-blocker{
    background-color: rgba(0,0,0,0.5);
    position: absolute;
    width: 500px;
    height: 200px;
}