In website development, experience does bring much agility to a programmer. Although this knowledge becomes outdated very fast, we must stay updated with the new features, selectors, and enhancements as soon as they have compatibilities with browsers.
The three main sites to check the compatibility of techniques and features, depending on our browser and device, are: CanIUse.com, MobileHTML5.org, and QuirksMode.org.
The CanIUse.com website is the best-known site among these reference sites, where we can check the compatibility tables that support HTML5, CSS3, SVG and more, in desktop and mobile browsers.
If you access the website http://caniuse.com, you will see that its data is based on statistics collected by StatCounter GlobalStats and it is constantly updated.
It is also important to read the Notes and Known Issues tab (as we can see in the following screenshot) because we are part of a community that greatly contributes to the evolution...