Comments in CSS - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the syntax for writing a comment in CSS?

A CSS comment starts with /* and ends with */. Anything between these markers is ignored by the browser.

beginner

Can CSS comments be placed inside a CSS rule or only outside?

CSS comments can be placed anywhere in the CSS file, including inside CSS rules, between properties, or outside rules. They do not affect the styles.

beginner

Why should you use comments in your CSS code?

Comments help explain your code to yourself and others. They make it easier to understand, maintain, and update styles later.

beginner

Are CSS comments visible on the webpage when viewed in a browser?

No, CSS comments are not shown on the webpage. They are only visible in the CSS source code and ignored by the browser when rendering.

intermediate

What happens if you forget to close a CSS comment?

If a CSS comment is not closed with */, the browser will treat the rest of the CSS file as a comment, causing styles to break or not apply.

Which of the following is the correct way to write a CSS comment?

A // This is a comment

B <!-- This is a comment -->

C /* This is a comment */

D # This is a comment

CSS comments start with /* and end with */. Other styles are used in different languages.

Can CSS comments be placed between CSS properties inside a rule?

A Only at the end of the CSS file.

B Yes, comments can be placed anywhere in CSS.

C Only at the start of the CSS file.

D No, comments can only be outside rules.

CSS comments can be placed anywhere, including inside CSS rules between properties.

What will happen if you forget to close a CSS comment?

A The browser ignores the rest of the CSS file.

B The comment closes automatically.

C The CSS file will work normally.

D The browser shows an error message.

Without closing, the browser treats the rest of the CSS as comment, so styles won't apply.

Are CSS comments visible on the webpage when viewed by users?

A No, they are only in the source code.

B Yes, they appear as text on the page.

C Only in some browsers.

D Only if you use special tags.

CSS comments are ignored by browsers and do not show on the webpage.

Why is it good to use comments in CSS?

A To hide CSS from browsers.

B To make the page load faster.

C To change the color of text.

D To explain code and make it easier to maintain.

Comments help explain your code for yourself and others, improving maintenance.

Explain how to write a comment in CSS and why it is useful.

Think about how comments help you understand your own notes later.

Describe what happens if a CSS comment is not properly closed.

Imagine leaving a note open without an ending.