Javascript - (Interpreter|Engine)

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1 - About

Javascript Interpreter (JavaScript engine) is a software which interprets and executes JavaScript.

Javascript can run in two different environment:

If the javascript script has no dependencies to the DOM, it can be run in a non-browser JavaScript environment.

The JavaScript engine actually compiles the program on the fly and then immediately runs the compiled code.

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3 - Type

3.1 - Browser

Although there are several uses for a JavaScript engine, it is most commonly used in web browsers. The developer tools of the browsers have a javascript interpreter that you find mostly in the console

3.2 - Non-Browser

3.3 - ??

  • SpiderMonkey
  • Chakra
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4 - Management

4.1 - Get

if (typeof document !== 'undefined') {
  // We are in a browser context
} else {
  // We are in a non-browser context (node,..)
}