# JavaScript engine of major browsers.
What then is javascript ?
**Javascript**=JavaScript is a text-based programming language used both on the client side and the server side,which allows you to make web pages interactive.where HTML and CSS are languages that give structure and style to web pages,javaScript gives web pages interactive elemets that engage a user.
Java script is a technical programming language.
The part of the browser that executes the javascript is the javascript engine,the engine is called the v8 engine.The part of the browser that executes the javascript is the javascript engine.**The first javascript engine was created by Brenden Eich in 1995** for the netscape navigator web browser. It was a rudimentary interpreter for the nascent language Eich invented.
## Each major web browser has its own JavaScript engine that interprets and executes JavaScript code. Here are the primary JavaScript engines used by major browsers:

1. **Google Chrome & Microsoft Edge → V8**
* Developed by Google, V8 is an open-source JavaScript engine written in C++.
* It is also used in Node.js.
2. **Mozilla Firefox → SpiderMonkey**
* Developed by Mozilla, SpiderMonkey was the first JavaScript engine ever created.
* Used in Firefox and various Mozilla projects.
3. **Apple Safari → JavaScriptCore (Nitro)**
* Developed by Apple, JavaScriptCore is the engine used in Safari.
* Also known as "Nitro" for its optimized Just-In-Time (JIT) compilation.
4. **Microsoft Internet Explorer (Legacy) & Older Edge → Chakra**
* Internet Explorer used the Chakra engine.
* Microsoft Edge (before switching to Chromium) also had its own version of Chakra.
6.**Opera → V8**
* Opera now uses the Chromium engine, meaning it also runs on V8.
### Conclusion
The part of the browser that executes the javascript is the javascript engine,the engine is called the v8 engine.The part of the browser that executes the javascript is the javascript engine.**The first javascript engine was created by Brenden Eich in 1995** for the netscape navigator web browser. It was a rudimentary interpreter for the nascent language Eich invented.