Tutorial : https://fariabriya.codes/blog/building-cross-framework-widget-with-react/
In the project directory, you can run:
This command will build the widget.js file and create a brand-widget folder.
The widget then can be used like this
feedbackWidget.init({
title: 'Rate your experience',
theme: '#effe',
buttonText: 'Okay',
handleSubmit: (val) => this.someMethod(val)
})