How to use calc in css

The calc() function in CSS is used to dynamically calculate values, allowing mathematical operations to be applied to values ​​such as length, percentage, etc. to create dynamic layouts. It supports addition, subtraction, multiplication, and division operations and is widely supported in all major browsers, making it easy to use. Pay attention to unit compatibility, avoid overdoing it to ensure performance, and prioritize responsive design techniques like flexbox and grid layout.

Usage of calc() in CSS

What is calc()?

calc() is a function in CSS that is used to calculate values ​​dynamically. It allows you to apply mathematical operations to length, percentage, and other CSS values ​​to create dynamic and responsive layouts.

Syntax of calc()

<code>calc(<expression>)</code>

where is a string containing mathematical operations.

Operators

calc() function supports the following operators:

• (addition)
• - (subtraction )
• *(Multiplication)
• /(Division)
• %(Percent)
• ((Brackets)

Usage example

Calculate total width

<code>width: calc(100% - 20px);</code>

Calculate row height

<code>line-height: calc(1.5em + 5px);</code>

Settings 80% of the viewport height

<code>height: calc(80vh);</code>

Set 50% of the grid column width

<code>grid-template-columns: repeat(2, calc(50% - 10px));</code>

Advantages of calc()

• Dynamics and responsiveness: calc() allows you to create variable layouts that adjust their values ​​based on view size or other factors
• Cross-browser compatibility: calc() at all. Widely supported in all major browsers
• Easy to use: calc() has a simple and easy-to-understand syntax, making it a very convenient tool.

##Notes

Make sure the units used in expressions are compatible.
• Overuse of calc() may impact performance
• Always prioritize responsive design techniques such as flexbox and grid layout

The above is the detailed content of How to use calc in css. For more information, please follow other related articles on the PHP Chinese website!