Shulou(Shulou.com)06/01 Report--

This article mainly introduces the relevant knowledge of "whether the javascript engine is a virtual machine". The editor shows you the operation process through an actual case. The operation method is simple, fast and practical. I hope this "javascript engine is not a virtual machine" article can help you solve the problem.

The javascript engine is a virtual machine. The JavaScript engine is a virtual machine that specializes in processing JavaScript scripts, which is generally included in web browsers to interpret and execute js scripts.

The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

JavaScript engine:

The so-called JavaScript engine is a virtual machine that specializes in processing JavaScript scripts, which is generally attached to web browsers to interpret and execute js scripts.

The famous js engine:

Mozilla:SpiderMonkey engine, the first JavaScript engine in the world, written by Cramp Clipper +, for Mozilla Firefox version 1.0 / 3.0

Google:V8 engine, written in Clover / assembly language, for chrome browsers

Microsoft: Chakra (chakra, laugh) engine for 32-bit version of Internet Explorer 9

Virtual machines:

Js virtual machine is a kind of process virtual machine, which has a virtual instruction set (ISA).

Runtime environment:

That is, runtime: to be in charge of some important factors of program execution when the program is running, to ensure the security of program execution and so on.

It can be explained by a picture:

The blue part is the virtual machine, and the blue plus gray is the engine.

Figuratively speaking, the JavaScript engine is a working machine, and the JavaScript virtual machine is the execution core of this machine, and the runtime environment of JavaScript is the machine.

Run-time fuel, lubricating oil, and so on, the three of which work together are important for browsers to work properly.

This is the end of the content about "is the javascript engine a virtual machine"? thank you for reading. If you want to know more about the industry, you can follow the industry information channel. The editor will update different knowledge points for you every day.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.