使用 React Hooks 自动调整 iframe 的高度

Question

I have been working on adjusting iframe height automatically.

The solutions with the problem are not working in React Hooks.

I have read Setting iframe height to scrollHeight in ReactJS and Adjust width and height of iframe to fit with content in it . I have explored additional posts and tried several times for almost a week. However, I have not found a proper way to figure this out.

I simplified what I have tried. My code

Apart from my code, I also tried iframeResizer.min.js , yet it is not working. I believe it is because react generates dynamically. I found iframe-resizer-react and tried but I have not found a way to solve it.

Can anybody have the same situation? How can I adjust iframe height automatically in React Hooks?

Answer 1

from Setting iframe height to scrollHeight in ReactJS :

Use the onLoad() handler from the iframe to ensure that the content has loaded before you try to resize it - if you try to use React's lifecycle methods like componentDidMount() you run the risk of the content not being present yet.

function FrameWrapper() {
  const ref = React.useRef();
  const [height, setHeight] = React.useState("0px");
  const onLoad = () => {
    setHeight(ref.current.contentWindow.document.body.scrollHeight + "px");
  };
  return (
    <iframe
      ref={ref}
      onLoad={onLoad}
      id="myFrame"
      src="http://demo_iframe.htm"
      width="100%"
      height={height}
      scrolling="no"
      frameBorder="0"
      style={{
        maxWidth: 640,
        width: "100%",
        overflow: "auto",
      }}
    ></iframe>
  );
}

PS: You will run into issues with cross-origin policy if the iframe is in a different domain.