Frequent question: How can you add a comment in a JavaScript?

For a single-line comment, you have to write two forward slashes: // . Anything that goes after // up until a line break is treated as a JavaScript comment and not executed as code.

How do I put comments in JavaScript?

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. When you place these two slashes, all text to the right of them will be ignored, until the next line.

How can you add a comment in a JavaScript Mcq?

“How can you add a comment in a JavaScript? mcq” Code Answer

  1. //This is a javascript single line comment.
  2. /*
  3. And here is a.
  4. multiline comment.
  5. */

How do you write comments in CSS and JavaScript?

The /* */ comment syntax is used for both single and multiline comments. There is no other way to specify comments in external style sheets. However, when using the <style> element, you may use <! — –> to hide CSS from older browsers, although this is not recommended.

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What is the main purpose of comments in JavaScript?

JavaScript Comments: Main Tips

Comments in JavaScript are used to explain the code and make the program more readable for developers. In programming, comments can also be used to prevent some code lines from being executed. This is useful when testing.

What is the shortcut to comment out in JavaScript?

If you select a block of code and use the key sequence Ctrl+K+C, you’ll comment out the section of code. Ctrl+K+U will uncomment the code.

How do you insert a comment with more than one line?

To comment more than one line:

  1. Select all the lines that you would like to be commented.
  2. Press Ctrl + / Two slashes “//” will be added to the front of each line, causing them to be recognized as a comment.

What is JavaScript comment?

The JavaScript comments are meaningful way to deliver message. It is used to add information about the code, warnings or suggestions so that end user can easily interpret the code. The JavaScript comment is ignored by the JavaScript engine i.e. embedded in the browser.

What can be done with client side JavaScript?

Client-side JavaScript statements embedded in an HTML page can respond to user events such as mouse clicks, form input, and page navigation. For example, you can write a JavaScript function to verify that users enter valid information into a form requesting a telephone number or zip code.

How do you add notes in HTML and CSS?

To comment in CSS, simply place your plain text inside /* */ marks. This tells the browser that they are notes and should not be rendered on the front end.

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How do you add comments in HTML and CSS?

A CSS comment is placed inside the <style> element, and starts with /* and ends with */ :

  1. /* This is a single-line comment */ p { color: red; } Try it Yourself »
  2. p { color: red; /* Set text color to red */ } Try it Yourself »
  3. /* This is. a multi-line. comment */ p { color: red; } Try it Yourself »

How do I make a comment box in HTML and CSS?

In HTML, create a section with an id “app” and place a textarea (for comment input) and p element for comment output.

  1. <section id=”app”>
  2. <div class=”container”>
  3. <div class=”row”>
  4. <div class=”col-6″>
  5. <div class=”comment”>
  6. <p v-for=”items in item” v-text=”items”></p>
  7. </div><!– End Comment–>
  8. </div><!– End col –>

What is a JavaScript keyword explain with examples?

The JavaScript this keyword refers to the object it belongs to. … In a function, this refers to the global object. In a function, in strict mode, this is undefined . In an event, this refers to the element that received the event. Methods like call() , and apply() can refer this to any object.

How do you write a function comment?

Primarily, a single “block” comment should be placed at the top of the function (or file) and describe the purpose the code and any algorithms used to accomplish the goal. In-line comments should be used sparingly, only where the code is not “self-documenting”.

How do you comment node JS?

The first way is the single-line comment by using two forward slashes ( // ).

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