What is the browser support for modern JavaScript features?

What is the browser support for modern JavaScript features?

Modern JavaScript features like ES6, ES7, and beyond have varying levels of support across different browsers. For example, features like arrow functions and template literals are widely supported in most modern browsers, while others like optional chaining may not be fully supported in older versions.

Can you give me a specific example of a feature and its support?

Sure! Let's take the Promise object as an example. It is supported in all modern browsers, including Chrome, Firefox, Safari, and Edge. However, Internet Explorer does not support it.

How can I check the support for other features?

You can use resources like MDN Web Docs or Can I use, which provide detailed compatibility tables for various JavaScript features across different browsers.

What about polyfills? Do I need them?

Polyfills can be useful if you want to use modern features in older browsers that do not support them. They allow you to add functionality that mimics the behavior of newer features.