How to get native javascript functions source code?

Question

In console it appears as native function but I\'d like to know how they were constructed. For example what is the code which executes when pressing space bar to scroll the p

Answer 1

While this will not show you actual source code, if you're interested in how many of the native JavaScript functions are implemented, you can peruse the specification upon which they are based:

Standard ECMA-262

Answer 2

1. Pick a browser
2. Make sure it is an open source one
3. Dig through its source code

Some repositories include:

• Firefox
• Webkit
• Chromium

Note that JavaScript native functions are generally not written in JavaScript (expect C or C++ most of the time). They are just exposed to JS through an API.

Also note that the code that scrolls a page when the spacebar is pressed isn't even a function that is exposed to JS.

Answer 3

What is V8?

• V8 is Google's open source JavaScript engine.
• V8 implements ECMAScript as specified in ECMA-262.
• V8 is written in C++ and is used in Google Chrome, the open source browser from Google.
• V8 can run standalone, or can be embedded into any C++ application.
• V8 project page: https://github.com/v8/v8/wiki
• V8 source code: https://github.com/v8/v8