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Master CSS Variables: Unlock Code Reusability and Styling Excellence

Master CSS Variables: Unlock Code Reusability and Styling Excellence
Master CSS Variables: Unlock Code Reusability and Styling Excellence

CSS Variables: Enhance Code Reusability and Styling

CSS variables, also known as CSS custom properties, provide a powerful solution for managing and reusing values within CSS stylesheets. They eliminate the need for repeated code, simplifying maintenance and enhancing styling efficiency.

Defining CSS Variables

To define a CSS variable, use the -- prefix followed by a custom name. Assign a value using the var() function:

:root {
  /* Backgrounds */
  --primary-background: #faf8ef;
  /* Colors */
  --primary-text-color: #776e65;
}

Using CSS Variables

To utilize CSS variables, refer to them in your styles using the var() function, passing the variable name as an argument:

body {
  margin: 0;
  background: var(--primary-background);
  color: var(--primary-text-color);
}

CSS Variables in React

For React developers, setting and retrieving CSS variable values requires a bit of JavaScript.

Setting CSS Variable Values

Use document.documentElement.style.setProperty() to set CSS variable values:

import { useEffect } from 'react';
export default function Example() {
  useEffect(() => {
    document.documentElement.style.setProperty('--primary-background', `black`);
    document.documentElement.style.setProperty('--primary-text-color', `white`);
  }, [])
  return <div style={{color: "var(--primary-text-color"}}>Hello World</div>
};

Retrieving CSS Variable Values

To retrieve CSS variable values, use document.documentElement.style.getPropertyValue():

import { useEffect, setState } from 'react';
export default function Example() {
  const [color, setColor] = useState('black');
  useEffect(() => {
    const cssColor = document.documentElement.style.getPropertyValue('--primary-text-color');
    setColor(cssColor);
  }, [])
  return <div style={{color: color}}>Hello World</div>
};

Benefits of CSS Variables

CSS variables offer numerous advantages:

  • Code reusability: Reduces code duplication by centralizing common values in a single location.
  • Design consistency: Enforces consistent styling across elements, ensuring a cohesive user experience.
  • Dynamic styling: Enables easy adjustment of design elements, such as changing colors or fonts, without the need to modify multiple stylesheets.
  • Improved efficiency: Simplifies styling processes, saving time and effort.

CSS variables have become an indispensable tool for modern web development, providing greater control, flexibility, and efficiency.

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