The JavaScript comment is ignored by the JavaScript engine i.e. There are complex algorithms. Let’s take a quick look at the two different types of JavaScript comment syntax.Single-line comments are written with two forward slashes (//):All characters immediately following the // syntax until the end of the line will be ignored by JavaScript.Block comments, sometimes referred to as mutli-line comments, are written with opening tags (/*) and closing tags (*/). There’s nothing to comment. All rights reserved. Which comments are good?Such comments allow us to understand the purpose of the function and use it the right way without looking in its code.If there are many ways to solve the task, why this one?
The anonymous function name is 'myFunctionVar', because myFunctionVar variable name is used to infer the function name. The JavaScript comment is ignored by the JavaScript engine i.e. It’s clear what every function does, what it takes and what it returns.In reality, we can’t totally avoid “explanatory” comments. 4. Advantages of JavaScript comments. Multi-line comments are more often used for formal documentations. Inline comments inside methods and functions should be formatted as follows: Top ↑ Single line comments # Single line comments // Extract the array values. IntelliSense in Visual Studio displays information that you add to a script using standard JSDoc comments. Not only will this help you remember it later on, but if you someone else views your code, they will also be able to understand the code (hopefully)!Another great thing about comments is the ability for comments to remove bits of code from execution when you are debugging your scripts. Developed by JavaTpoint. JavaScript Comments Single Line Comments. Answer: Use the syntax "// text" and "/* text */" Comments in CSS are typically used to explain the purpose of the style rules declarations. It is used to add information about the code, warnings or suggestions so that end user can easily interpret the code. Topic: JavaScript / jQuery Prev|Next.
There are mainly two advantages of JavaScript comments. A function declaration is made of function keyword, followed by an obligatory … Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. And also the code structure is better when split. While using this site, you agree to have read and accepted our embedded in the browser. © Copyright 2011-2018 www.javatpoint.com. This is useful when testing.
Comments in JavaScript are used to explain the code and make the program more readable for developers.
The JavaScript comments are meaningful way to deliver message.
It can be used before and after the statement.Let’s see the example of single-line comment i.e. to explain the code:This example uses a multi-line comment (a comment block) to explain the code:Using comments to prevent execution of code is suitable for
When you place these two slashes, all text to the right of them will be ignored, until the next line.These types of comments are great for commenting out single lines of code and writing small notes.Each line of code that is colored red is commented out and will not be interpreted by the JavaScript engine.Although a single line comment is quite useful, it can sometimes be burdensome to use when disabling long segments of code or inserting long-winded comments. This lesson will teach you how to create two types of comments in JavaScript: single line comments and multi-line comments.To create a single line comment in JavaScript, you place two slashes "//" in front of the code or text you wish to have the JavaScript interpreter ignore. The JavaScript comment is ignored by the JavaScript engine i.e. name property holds the function name
Especially when it’s not the most obvious one.Without such comments the following situation is possible:Comments that explain the solution are very important. It will help you and others to understand what you were trying to do with the style rules at the time of editing style sheets. All JavaScript items (methods, object constructors and properties, functions, variables, etc.) It has some additional properties compared to simple function expression: A named function is created, i.e. In Visual Studio 2008, a JavaScript function, I comment the line，.