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This article introduces the relevant knowledge of "what versions of javascript". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The versions of javascript are: 1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8, 1.8.1, 1.8.2, 1.8.5 and so on.

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

JavaScript (JS for short) is a lightweight, interpretive or just-in-time programming language with function priority. Although it is known as a scripting language for developing Web pages, it is also used in many non-browser environments. JavaScript is based on prototype programming, multi-paradigm dynamic scripting language, and supports object-oriented, imperative, declarative, and functional programming paradigms.

JavaScript is a scripting language belonging to the network, which has been widely used in Web application development. It is often used to add a variety of dynamic functions to web pages and provide users with a more smooth and beautiful browsing effect. Usually JavaScript scripts implement their own functions by embedding them in HTML.

JavaScript was developed for Netscape. Netscape 2 was the first browser to run JavaScript.

After Netscape, the Mozilla Foundation continued to develop JavaScript for Firefox browsers.

The latest version of JavaScript is 1.8.5. (same as ECMAScript 5).

ECMAScript was developed by ECMA International after the organization adopted JavaScript.

The first version of ECMAScript was released in 1997.

This list compares the version numbers of different products:

JavaScript version

Version

Release date

Based on

Netscape Navigator

Mozilla Firefox

Internet Explorer

Opera

Safari

Google Chrome

1.0

March 1996

2.0

1.1

August 1996

3.0

3.0

1.2

June 1997

4.0-4.05

1.3

October 1998

ECMA-262 1 edition / ECMA-262 2 edition

4.06-4.7x

4.0

1.4

Netscape

Server

1.5

November 2000

ECMA-262 3 edition

6.0

1.0

5.5 (JScript 5.5)

6 (JScript 5.6)

7 (JScript 5.7)

8 (JScript 6)

6.0

7.0

8.0

9.0

1.6

November 2005

1.5 + Array extras + Array and String generics + E4X

1.5

3.0, 3.1

1.7

October 2006

1. 6 + Pythonic generators + Iterators + let

2.0

3.2, 4.0

1.0

1.8

June 2008

1.7 + Generator expressions + Expression closures

3.0

11.50

1.8.1

1.8 + Native JSON support + Minor Updates

3.5

1.8.2

22 June 2009

1.8.1 + Minor updates

3.6

1.8.5

July 27, 2010

1.8.1 + ECMAScript 5 Compliance

four

nine

11.60

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