Shulou(Shulou.com)06/03 Report--

What this article shares with you is about what JavaScript is and how to use it. The editor thinks it is very practical, so I share it with you to learn. I hope you can get something after reading this article.

1. The name JavaScript

JavaScript, as its name implies, seems to be some kind of lightweight scripting language for the Java language. In fact, the original intention of the language JavaScript is indeed the same.

First of all, similar to Java, JS is also derived from C or expression, marked with {} instead of expression.

Secondly, JS was initially positioned as a lightweight Java language that can run on Web, for users who are familiar with the Java language

Finally, ask for a good word of mouth. When JS was born in 1995, Java was popular.

However, another fact is that JS is neither Java nor a lightweight (such as Python) Script scripting language.

In addition, JavaScript is a registered trademark of Oracle, so it is often replaced by the abbreviated JS or ECMAScript in the standards file.

2. JavaScript is based on the Specication of the world

The technical specification of JavaScript is fully steered by the TC39 committee (50,100 people from browser manufacturers, equipment manufacturers, etc.). They meet every two months to discuss all the progress of Proposals.

The proposed Proposals is divided into five stages, Stage0,Stage1,Stage2,Stage3,Stage4; and open source discussion on Github.

Thanks to the excellent maintenance of standards by the TC39 Technical Committee, JS has only one version. This is essentially different from the scattered soldiers of Python, which is completely driven by the community.

Although the JS language continues to expand, from browsers to servers, to robots, to lighting, and so on, its specifications are mainly aimed at browsers.

Third, many faces of JavaScript

There are three Paradigm paradigms for programming languages-procedural, object-oriented (OO/classes), and and functional (FP). For example, the C language is Procedural-Paradigm, while Java/C++ is OO-Paradigm,Scheme and FP-Paradigm.

JS is flexible and a multi-paradigm language, so it can draw on the strengths of many families.

Fourth, Inpterpreted or Compiled?

Finally, we need to clarify whether JS is an interpreted language or a compiled language. At first glance, JS seems to be an "interpreted language" despised by "compiled languages".

The surprise is that JS is a compiled language, so it has an infinitely bright future in terms of performance.

The above is what JavaScript is and how to use it. The editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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