To make a widget re-render every time the parent website URL changes, you can use the window.onhashchange event in JavaScript. This event is triggered whenever there is a change in the URL fragment (hash), which typically happens when the parent website's URL changes due to navigation.

Here's a step-by-step guide on how to achieve this:

  1. Create Your Widget Component: First, create your widget component that you want to re-render whenever the parent website URL changes. This component should contain the UI and logic for your widget.

  2. Add the window.onhashchange Event Listener: In your widget component, add an event listener to the window.onhashchange event. This event will trigger the re-rendering of your widget every time the URL changes.

    javascript
    import React, { useEffect } from 'react'; const MyWidget = () => { const handleURLChange = () => { // Your logic to handle URL changes here // This function will be called whenever the parent website URL changes }; useEffect(() => { // Add the event listener when the component mounts window.addEventListener('hashchange', handleURLChange); // Remove the event listener when the component unmounts to avoid memory leaks return () => { window.removeEventListener('hashchange', handleURLChange); }; }, []); return ( // Your widget UI here ); }; export default MyWidget;

    In the handleURLChange function, you can implement the logic to re-render or update your widget based on the changes in the parent website URL.

  3. Use the Widget Component in Parent Website: Now, you can use your widget component in the parent website where you want it to be displayed. Import the widget component and place it where you want it to appear.

    javascript
    import React from 'react'; import MyWidget from './MyWidget'; const App = () => { return ( <div> <h1>Parent Website</h1> {/* Other content */} <MyWidget /> </div> ); }; export default App;

    With this setup, your widget will re-render every time the parent website's URL changes. The handleURLChange function inside the widget component will be called automatically whenever the URL hash changes, allowing you to update the widget's UI or perform any necessary actions.

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