What is 'normalize' in CSS?

normalize.css or similar solutions in functionality (for example, Reset CSS) are used to reset or normalize default styles that differ between browsers. This ensures more predictable and consistent rendering of elements across different platforms.

Main differences between normalize.css and Reset CSS:

• Reset CSS: Resets styles of all elements to a minimum (for example, nullifies margins, borders, and typography). It is convenient for creating a fully custom design but requires manually adding many styles for standard elements (lists, forms, etc.).
• normalize.css: Fixes discrepancies in default styles while preserving useful standard styles (for example, typography for headings, margins for lists). This minimizes the need for further overrides.

Examples of normalization:

• Uniform display of <h1>-<h6> across different browsers.
• Resetting margin and padding for elements like body.
• Correcting differences in the display of forms and buttons.

/* Example from normalize.css for body */
body {
  margin: 0; /* Removes default margin */
}

/* Example from normalize.css for h1 */
h1 {
  font-size: 2em; /* Sets standard size */
  margin: 0.67em 0; /* Sets standard margins */
}

In the end, using normalize.css helps avoid cross-browser issues early in development and creates a more stable foundation for further styling.