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Write an example using the child combinator. | Combinators | CSS Interview Questions | NextRound.in

Questions

2 of 25

1How is the child combinator different from the descendant combinator?

2Write an example using the child combinator.

3Write a selector to target all <a> tags inside a <nav> but not inside a <footer>. How would you use combinators to create alternating styles between elements?

4What happens when combinators are used inside media queries? How can combinators improve maintainability in large CSS projects?

5How do combinators affect CSS inheritance and cascade?

6Can combinators be used together with pseudo-classes or pseudo-elements?

7How can overusing descendant combinators affect performance?

8What happens if you use a combinator between unrelated elements?

9Can you list all the types of CSS combinators?

10What is the descendant combinator in CSS?

11What is the syntax for a combinator selector?

12What are CSS combinators? How many types of CSS combinators are there?

13How does the descendant combinator differ from a direct child combinator? Write an example of a descendant combinator selector. What is the impact of using multiple descendant selectors in a chain?

14Give a real-world example of using multiple combinators in a single rule.

15What is the purpose of using combinators in CSS?

16How can you style all <span> elements that come after a specific <div>?

17How would you select all <p> elements that are inside a <div> using combinators? How would you style only the direct child <li> elements inside a <ul>?

18How would you change the color of a paragraph that immediately follows a heading?

19What happens if the sibling element doesn’t exist in the DOM? Can you combine multiple combinators in a single selector? Give an example.

20Can the general sibling combinator (~) select elements that appear before the reference element?

21When would you use the general sibling combinator (~) instead of the adjacent sibling combinator (+)?

22How does the adjacent sibling combinator (+) differ from the general sibling combinator (~)? What is the general sibling combinator (~) used for?

23Can the adjacent sibling combinator select multiple elements? Write an example using the adjacent sibling combinator.

24When would you prefer to use the child combinator instead of the descendant combinator?

25Can the child combinator select a grandchild element? Why or why not?

CSS

Text formatters

Pseudo elements

Transformation and Transition

Everything else

02 / 25

Write an example using the child combinator.

Difficulty: 2/10

CSS selectors, combinators, specificity

Using the Child Combinator in CSS

The child combinator (>) allows you to select elements that are direct children of a specific parent element, providing more precise targeting than the descendant combinator.

Key Points

1
Child combinator syntax: A > B – selects only B elements that are immediate children of A.
2
It does not select elements nested deeper than the first level.
3
Useful for styling direct children without affecting nested descendants.

Example: Child Combinator

Scenario Questions

0-2 years experience

1How would you write CSS to style only the direct <li> children of a <ul> without affecting nested <li> elements?
2If you have a <div class="card"> with several <p> tags, show me a selector that targets only the first <p> that is a direct child.

2-5 years experience

1We have a toolbar component where a button should get a special background only when it’s a direct child of the toolbar, not when it’s inside a dropdown. How would you implement that and why might an initial selector you wrote fail?
2During a UI bug, a style meant for direct‑child .item elements is also applying to nested .item elements. Walk me through how you’d debug the issue and fix the selector.

5-8 years experience

1Our design system nests components deeply, and we need utility classes to affect only immediate children to avoid overrides. How would you structure the selectors, and what trade‑offs does using the child combinator introduce for maintainability and performance at scale?
2When rendering a large virtual‑scrolled list, you notice that applying a child combinator selector causes noticeable reflows. Explain why that happens and how you might mitigate the performance impact.

8+ years experience

1We’re migrating a legacy codebase that relies heavily on descendant selectors to a more performant CSS architecture. How would you evaluate replacing those with child combinators across the system, and what impact would that have on cross‑team component contracts and future theming?
2In a multi‑team UI library, you need to enforce that certain style rules apply only to immediate children to prevent style leakage. Describe a strategy—including lint rules or tooling—to enforce correct use of the child combinator at scale.

Follow-up Questions

What would change if you used a descendant selector instead of the child combinator?
How does the specificity of a child combinator selector compare to a class selector?
Are there any browser compatibility concerns with using >?

https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors#combinators
https://css-tricks.com/almanac/selectors/c/combinator/

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