1. CanIUse Can I Use is a cool tool for checking if you can use a CSS feature for certain browsers. Can I use… Support tables for HTML5, CSS3, etc
“Can I use” provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile…caniuse.com 2. BundlePhobia BundlePhobia allows you to check the size of packages before you use them BundlePhobia
Bundlephobia helps you find the performance impact of adding a npm package to your front-end bundlebundlephobia.com