Which service to use to determine which versions of the browser the code will work in?

Question

JavaScript

Help me find a service like caniuse that gives the version of browsers for the tested code for which the code will work and, preferably, points to functions that can be downgraded to cover more browser versions

Answer 1

Usually there is a webpack + babel-preset-env service for this, where you specify which browsers to support and it does this automatically when building
https://babeljs.io/docs/en/next/babel-preset-env.html

Answer 2

https://kangax.github.io/compat-table/es6/
Here is just a table