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This article mainly talks about "what type of javascript language does it belong to". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn what type of javascript language belongs to.

JavaScript is a literal scripting language, which is dynamically typed, weakly typed and prototype-based. The JS language uses weak variable types and does not make strict requirements on the data types used; JS is an event-driven scripting language that can respond to user input without going through the Web server.

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

JavaScript is a literal scripting language, which is dynamically typed, weakly typed and prototype-based. Its interpreter, known as the JavaScript engine, is a part of the browser and is widely used in the client scripting language. It was first used on HTML pages to add dynamic functions to HTML pages.

JavaScript (abbreviated as "JS") is the most popular and widely used client script language, which is used to add some dynamic effects and interactive functions to web pages, and plays an important role in the field of Web development.

JavaScript has the following characteristics:

Interpretive scripting language

JavaScript is an interpretive scripting language. Unlike C, C++ and other languages that need to be compiled and then run, code written with JavaScript does not need to be compiled and can be run directly.

object-oriented

JavaScript is an object-oriented language, using JavaScript can not only create objects, but also manipulate and use existing objects.

Weak type

JavaScript is a weakly typed programming language with no strict requirements on the data types used. For example, you can initialize a variable to any type, or you can change the type of the variable at any time.

Dynamic property

JavaScript is an event-driven scripting language, which can respond to user input without the help of a Web server. For example, when we visit a web page, when we click on the web page or scroll through the window through the mouse, we can respond to these events directly through JavaScript.

Cross platform

JavaScript is independent of the operating system and can be run in a browser. So a JavaScript script can be run on any system after it has been written, as long as the browser on the system supports JavaScript.

Expand knowledge:

Programming languages can be divided into two categories according to data types, one is statically typed language, the other is dynamically typed language.

A statically typed language determines the type of a variable at compile time, while a dynamically typed language does not have a type until the variable is assigned a value when the program is running.

Advantages and disadvantages of statically typed languages

First of all, the advantage of statically typed language is that it can find type mismatch errors at compile time, and the editor can help us avoid some errors that may occur during the program run in advance. Secondly, if the data type is clearly defined in the program, the compiler can also optimize the program according to this information to improve the execution speed of the program.

The disadvantage of statically typed language is that first of all, it forces programmers to write programs according to strong contracts and specify data types for each variable. In the final analysis, it is only a means to assist us in writing programs with high reliability, not the purpose of writing programs. After all, most people write programs to complete the delivery of production requirements. Second, type declarations add more code, and these details distract programmers from thinking about business logic during programming.

Advantages and disadvantages of dynamically typed languages

The advantage of dynamically typed languages is that less code is written and looks more concise, and programmers can focus more on business logic. Although not distinguishing types can make a program difficult to understand in some cases, on the whole, the less code and the more focused on logical expression, the more helpful it is to read the program.

The disadvantage of dynamically typed languages is that they cannot guarantee the type of variables, so type-related errors may occur during the run time of the program.

The tolerance of variable types in dynamically typed languages brings great flexibility to actual coding. Since there is no need for type checking, we can try to call any method of any object, regardless of whether it was originally designed to own the method.

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