I has just occurred to me that I have been putting in a lot of time to learn new skills, and use those skills on projects. However, the cross browser compatibility has not occurred to me until now. What would be the best tools to check for cross browser compatibility?
Honestly, for the most part we manually test in the supported browsers. If we need to support multiple versions of browsers, we usually have VMs set up with those versions installed for testing purposes.
You can use sites like BrowserStack or LambdaTest, but you have to pay. BrowserStack only has a trial last I checked, LambdaTest gives you some free minutes every month.
But using VMs remotely to do real-time tests can be a little painful so if you can set up your own VMs that would be better.