A language which makes "Web Pages Alive"
The ECMA-262 specification contains the most in-depth, detailed and formalized information about JavaScript. It defines the language.
MDN (Mozilla) JavaScript Reference is the main manual with examples and other information. It’s great to get in-depth information about individual language functions, methods etc.
You can find it at https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference.
To search upon internet about particular term of Js:
simply type: MDN [term]
We can check any Js function's compatiblity with particular browser
we can check on: https://caniuse.com
or https://kangax.github.io/compat-table