How to write code in javascript programming

As a very popular programming language, JavaScript is widely used in various fields, such as web development, mobile development, desktop application development, etc. In these different fields, JavaScript is used in different ways, but writing good JavaScript code is the goal that every JavaScript developer needs to pursue. This article will give you an in-depth look at how to write better javascript code.

1. Understand the basic syntax of javascript

Before we start writing javascript code, we need to understand the basic syntax of javascript, such as variables, data types, functions, and statements in javascript etc. Only by mastering these basic knowledge can we better write correct and readable code.

2. Choose the appropriate naming method

Naming is a very important part of the code. A good naming method can help the code be easier to understand and maintain. In JavaScript, we usually use camelCase to name variable names and function names. In addition, you also need to pay attention to the following points:

• Avoid using single letters as variable names or function names, except in for loops.
• Use meaningful names to describe the purpose of a variable, function, or object.
• Try to avoid using the same name as a javascript reserved word.

3. Understand keywords and operators

When writing javascript code, we need to master the common keywords and operators in javascript, such as if, for , switch, typeof, instanceof, ===, etc. At the same time, you need to use these keywords and operators correctly to avoid syntax errors or logical errors.

4. Writing modular code

The modular programming method can facilitate us to better organize the code and reduce the complexity and coupling of the code. In javascript, we can use a modular approach to write code, such as through CommonJS or ES6 modular approach. In this way, we can divide the code into multiple small modules, each module is only responsible for completing one function, which facilitates code management and maintenance.

5. Use comments

Good comments can improve the readability and maintainability of the code and help others better understand our code. In javascript, we usually use // or / / to add comments. Annotated application scenarios include:

• Description of the role or function of the code.
• The meaning or purpose of the variable or function.
• Code changes or repair history.

6. Keep the code style consistent

When writing JavaScript code, we need to keep the code style consistent, such as using the same indentation method and code structure , naming methods of variables and functions, etc. By keeping the code style consistent, we can greatly improve the readability and maintainability of the code.

7. Avoid using global variables

Global variables exist throughout the life cycle of the application, and there will be certain difficulties in the management and maintenance of the code. In JavaScript, we should try to avoid using global variables. We can use closures, modularization, etc. to avoid the use of global variables.

Summary

In the process of javascript programming, in order to write clear, readable, and easy-to-maintain code, we need to master the basic syntax of javascript, choose appropriate naming methods, and understand key words and operators, write modular code, add comments, keep your coding style consistent, and avoid using global variables. These tips can all help us become better javascript developers.

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