CSS custom properties
CSS custom properties, also known as CSS variables, allow web developers to define reusable values that can be used throughout their stylesheets. These values can be changed dynamically using JavaScript or through user input, making it easier to create responsive and customizable web designs.
Here’s an example of how to define and use a custom property in CSS:
:root {
–primary-color: #007bff;
}
.button {
background-color: var(–primary-color);
}
CSS custom properties can also be used to create more complex and responsive layouts. For example, we can use custom properties to define breakpoints for media queries:
:root {
–breakpoint-small: 576px;
–breakpoint-medium: 768px;
–breakpoint-large: 992px;
}
@media (min-width: var(–breakpoint-medium)) {
.container {
max-width: 800px;
}
}
CSS custom properties are a powerful tool for creating more modular, reusable, and responsive CSS code. By defining values in a central location and using variables throughout our styles sheets, we can make it easier to update and customize our designs, while reducing the amount of code we need to write.