A brief history of dreaming back to javascript--

JavaScript was born in 1995, when the main purpose of JavaScript was to handle some of the input validation operations previously owned by the server-side language. Before JavaScript is available, the form data must be sent to the server side to determine if the user has not filled out a required field and has entered an invalid value. In the era of universal application of telephone dial-up internet, it is exciting to perform some basic verification tasks on the client, after all, the speed of dial-up internet thief is slow, resulting in every time with the server data interaction has become a patient test. Since then, JavaScript has become a feature of common browser prerequisites on the market.

JavaScript, however, was not called JavaScript at first, but instead called Livescript,netscape to take the LiveScript to Java, temporarily turning it into JavaScript.

A complete JavaScript implementation should consist of three different parts

1, Core ECMAscript

2, Document Object Model DOM

3, Browser object model BOM

ECMAScript does not have a dependency on a Web browser, ECMAScript is defined by ECMA-262, and it defines only a few components such as:

1, grammar

2, type

3, statement

4, keyword

5, reserved words

6, operator

7, Object

A brief history of dreaming back to javascript--