Скачать или смотреть Create grid using ReactJS and CSS Grid - CSS grid tutorial

CSS Grid is a two-dimensional layout system for the web that allows developers to create complex and responsive designs using rows and columns. It was developed to make it easier to create grid-based layouts, especially for complex and dynamic ones, without having to rely on hacky solutions like floats or table-based layouts.

With CSS Grid, you define a grid container and then place grid items within it. You can control the size, position, and behavior of these grid items using a variety of CSS properties. You can also nest grids within grids to create even more complex designs.

Some of the key benefits of using CSS Grid include:

Improved readability and maintainability of code
Better control over layout, especially for responsive designs
More efficient use of space on the page
Ability to create complex and dynamic layouts with ease

If you're interested in learning more about CSS Grid, I would recommend starting with some tutorials and guides to get a better understanding of its syntax and concepts. There are many resources available online that can help you get started.
In this example, the container class is the grid container, and the item class is used for the grid items. The grid-template-columns property is used to define the number of columns in the grid and their size, in this case, three equal-width columns (repeat(3, 1fr)). The grid-gap property is used to set the size of the gap between the grid items.

You can see that the grid items are automatically placed in the grid based on their order in the HTML. The items are placed in rows from left to right and from top to bottom, filling up each row before moving on to the next one.

This is just a simple example to demonstrate the basic concepts of CSS Grid. You can do much more with it, including controlling the size and position of individual grid items, creating nested grids, and using grid lines for precise placement of items.