make web pages alive.
The programs in this language are called scripts.
They can be written right in a web page’s HTML and executed automatically as the page loads.
Scripts are provided and executed as plain text. They don’t need special preparation or compilation to run.
- V8 – in Chrome and Opera.
- SpiderMonkey – in Firefox.
- …There are other codenames like “Trident” and “Chakra” for different versions of IE, “ChakraCore” for Microsoft Edge, “Nitro” and “SquirrelFish” for Safari, etc.