Introduction to Grid Layout

1. What is Grid layout

Grid layout is grid layout, which is a new css model. Generally, a page is divided into several main areas, and the size of these areas is defined., position and hierarchy, is currently the only css two-dimensional layout.

The difference between 2, and flex layout

The

Grid layout is substantially different from the flex layout. flex is a one-dimensional layout and can only handle one dimension.Layout, row or column.However, the Grid layout is a two-dimensional layout, dividing the container into "rows" and "columns", resulting in grids one by one, and grid elements can be placed in positions related to rows and columns, so as to achieve the purpose of layout.

flexLayout example:

GridLayout example:

3, Grid concept of layout

First, let's look at a small example to demonstrate some basic concepts

 
One
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.wrapper{margin: 60px;/* declare a container */display: grid;/* Declare the width of the column, the number 3 is repeated 3 times, that is, there are 3 columns with a width of 200px*/grid-template-columns: repeat(3,200px);/* declare line and column spacing */grid-gap: 20px;/* Represent the height of the two lines respectively */grid-template-rows: 100px 200px;}.item{text-align: center;font-size: 200%;color: #fff;}.one{background-color:#b8e8e0 ;}.two{background-color: #8CC7B5;}.three{background-color:#efe3bf ;}.four{background-color: #BEE7E9;}.five{background-color: #E6CEAC;}.six{background-color: #ECAD9E;}

Run result:

• Containers and Items

  We create a grid by declaring display:grid or display:inline-grid on the elementContainer, all immediate children of this element will become grid items.

• Grid Track

grid-template-columns and grid-template-rows properties to define the rows and columns in the grid

• Grid cells

A grid unit is the smallest unit in a grid element, One, Two, Three, Four…are all grid cells one by one

• Gridlines

  The lines that divide the grid are gridlines.It should be noted that when we define the grid, we define the grid track.Grid automatically creates numbered gridlines to position each element, m columns with m + 1 vertical gridlines, and n rows with n + 1 horizontal gridlines.Generally speaking, from left to right, from top to bottom, 1, 2, 3 are numbered and sorted, and from right to left, from bottom to top, they are numbered in the order of -1, -2, -3...

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