How do I test polyfills in my JavaScript code?

How do I test polyfills in my JavaScript code?

To test polyfills, you can use tools like Jest or Mocha to write unit tests that check if the polyfills are functioning as expected.

Can you give me an example of a polyfill test?

Sure! For instance, if you're polyfilling Array.prototype.includes, you can write a test to check if it returns true for an existing element.

What if the polyfill is not working?

If the polyfill isn't working, ensure that it's loaded before your code that uses it, and check for any errors in the console.

Are there any tools to help with polyfill testing?

Yes, tools like Babel can help you manage polyfills, and you can also use browser testing tools to verify functionality across different environments.