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Added useIFrameFocus, allows users to check if an Iframe is focused (… #277

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Added useIFrameFocus, allows users to check if an Iframe is focused (… #277

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36 changes: 36 additions & 0 deletions index.js
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Original file line number Diff line number Diff line change
@@ -1,5 +1,41 @@
import * as React from "react";

function useIFrameFocus(id: string, onFocus: () => any, onBlur: () => any) {
let iframeClickedLast: boolean;

function windowBlurred(e: Event) {
const el = document.activeElement as HTMLElement;
if (el?.getAttribute('id') === id) {
iframeClickedLast = true;
onFocus();
}
}

function windowFocussed(e: Event) {
if (iframeClickedLast) {
iframeClickedLast = false;
onBlur();
}
}

React.useEffect(() => {
window.addEventListener('focus', windowFocussed, true);
window.addEventListener('blur', windowBlurred, true);

return () => {
window.removeEventListener('focus', windowFocussed, true);
window.removeEventListener('blur', windowBlurred, true);
};
}, []);

function destroy() {
window.removeEventListener('focus', windowFocussed, true);
window.removeEventListener('blur', windowBlurred, true);
}
return destroy;
}


function isShallowEqual(object1, object2) {
const keys1 = Object.keys(object1);
const keys2 = Object.keys(object2);
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