How and When to Write Comments in Javascript

As a software developer, one of the most important things you can do is write comments in your code.

Comments are a way to communicate with other developers, or with yourself, about the code you are writing.

They help to explain what the code is doing, why it is doing it, and how it is doing it.

In this Javascript tutorial, we’ll look at how and when to write comments in Javascript.

Why Write Comments in Javascript

Documentation: Comments provide documentation for the code. They help to explain what the code does, and why it does it. This makes it easier for other developers to understand your code, and to use it in their own projects.
Maintenance: Comments can also help you to maintain your code. They provide a roadmap for the code, and help to identify areas that need improvement.
Debugging: Comments can also help you to debug your code. By leaving comments in your code, you can keep track of what you have done, and why you have done it. This makes it easier to identify and fix bugs.

At the start of the code: You should write a comment at the start of your code to provide a brief overview of what the code does.
Before complex code: If you have complex code, you should write a comment before it to explain what it does. This will help other developers to understand the code, and to use it in their own projects.
After debugging: If you have debugged your code, you should write a comment after the debug code to explain what you did, and why you did it. This will help other developers to understand the code, and to use it in their own projects.

Single-line comments start with two forward slashes (//).

Everything after the slashes on the same line is considered a comment.

// This is a single-line comment

Multi-line comments start with /* and end with */.

Everything in between is considered a comment.

/*
This is a multi-line comment.
It can span multiple lines.
*/

In conclusion, writing comments in Javascript is an important part of software development.

They help to provide documentation, to maintain the code, and to debug the code.

By following the tips in this tutorial, you can write effective comments in your Javascript code.