These CSS interview questions are based on my personal interview experience. Likelihood of question being asked in the interview is from top to bottom.
A css rule with !important always takes precedence.
If element is having inline style ( element style attribute ) overrides all other styles (1,0,0,0)
A css selector using element id (element id attribute) (0,1,0,0)
A css selector using class, pseudo class or attribute (0,0,1,0)
A css selector using element name (for e.g. h1, p, div) (0,0,0,1)
A css selector appear later in the code override earlier one if both have the same specificity
1. Do you know about Box model ? What are the different values of box-sizing css?
Margin-border-padding-content2. What are the css precedence rules and css specificity ?
Css specificity is the set of rules applied to determine which style is applied to an element.
Order of css specificity from highest to lowest is as follows:-
Good read to understand how to calculate specificity:-
3. Difference between visibility:hidden; and display:none;
visibilty:hidden element is not visible but space is allocated.
display:none element is not displayed and space is not allocated.
4. How to align a block element inside another element.
5. Difference between Static, Relative, Absolute and Fixed position
6. What is shadow dom
7. Pseudo elements
::before
::after
8. Pseudo classes
:active
:hover
:nth-child(n)
9. Media query in CSS3
10. em vs rem vs px ? Which unit of measurement you should use and when in css ?
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