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This article mainly introduces "how to understand javascript examples". In daily operation, I believe many people have doubts about how to understand javascript examples. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the doubts about "how to understand javascript instances"! Next, please follow the editor to study!

An instance is the figurative product of a class, the real object of a class, and the object is a content structure with multiple attributes; there is no class syntax in javascript, so the concept of a class is realized by creating an object.

This article operating environment: windows7 system, javascript1.8.5 version, Dell G3 computer.

An instance is the real object of a class. For example, we are both "people", you and I are both examples of "people". Instantiation is the process of creating an object, using the New keyword.

What is a javascript instance?

In written language, examples are practical examples.

In a computer language, a "class" is called an "instance" after instantiation. Classes are static and do not occupy process memory, while instances have dynamic memory. In a database, a collection of programs. For example, in Oracle, examples are database programs that can support the operation of the database.

Example:

Function start () {alert ("Bangla var obj!");} / / constructorfunction Car (color, title) {this.color = color; this.title = title; this.start = start;} var obj = {a _ Ting _ 1}; var car1 = new Car ("red", "BMW"); var car2 = new Car ("yellow", "VOIS")

Car1 and car2, both are examples. The simple understanding of an example is the finished product. Like cake. Car is the constructor, which can be understood as the mold for making cakes.

The difference between an instance and an object, by definition:

1. An example is a concrete product of a class.

2. The object is a content structure with multiple attributes.

All instances are objects, but not all objects are instances.

There is no syntax for a class (before ES6) in Js, so the concept of a class is implemented by creating an object.

At this point, the study on "how to understand javascript examples" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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