grid-template-areas is an attribute in CSS Grid used to intuitively define layout structures. It builds page layout by naming areas and arranging these names. For example, use "header header" to define that both columns in the first row are header areas, then "sidebar main" means that the second row is sidebar on the left and main on the right, and finally "footer footer" means that the third row is all footer. To assign an area name to an element, you need to use the grid-area attribute to specify the corresponding name, such as .header { grid-area: header; }. When designing the layout, dots (.) can be used to represent blank areas. The region names should be unique and the number of each line is consistent. At the same time, the region names are separated by spaces, and line breaks are implemented with line breaks. In actual applications, it is recommended to have a short and clear region name to ensure that the container has a display: grid set, and note that mainstream browsers support this feature but are not compatible with old IE. After mastering grid-template-areas, the web layout will be more intuitive and easy to adjust, just like building blocks.

CSS Grid's template-areas is a very intuitive way to define layout structures, especially suitable for beginners to understand the area division of pages. It allows you to arrange grid content in a "draw" way, rather than relying solely on rows and columns.

What is grid-template-areas ?

Simply put, grid-template-areas is when you give each grid area a name in CSS, and then define the layout structure by arranging these names. The biggest benefit of this method is that it is visualization, easy to understand and modify .

For example, you can write this:

 .container {
  display: grid;
  grid-template-areas:
    "header header"
    "sidebar main"
    "footer footer";
}

The meaning of this code is: the page has three rows and two columns, the first row is full of header; the second row is sidebar on the left, the right side is main; the third row is footer on the full.

How to assign a region name to an element?

It is not enough to just define grid-template-areas , and you also need to specify which region it belongs to for each child element. This step is done through grid-area attribute.

For example:

 <div class="container">
  <div class="header">Navigation bar</div>
  <div class="sidebar">Sidebar</div>
  <div class="main">Main content</div>
  <div class="footer">Bottom information</div>
</div>

Corresponding CSS:

 .header {
  grid-area: header;
}

.sidebar {
  grid-area: sidebar;
}

.main {
  grid-area: main;
}

.footer {
  grid-area: footer;
}

As long as the name corresponds to the element, the element will appear in the position you define.

A few tips for layout design

• The dot indicates a blank area : if you want a piece to be left blank, you can use .

  for example:

   grid-template-areas:
    "header header"
    ". main"
    "footer footer";

• Region names can be repeated, but not recommended : Although the same name can be technically reused, this will confusing the layout, and it is recommended that each region name be unique.

• The number of areas in each row must be consistent : that is, each row must have the same number of names, otherwise an error or layout exception will be reported.

• Separate the region names with spaces, and use newline characters for newlines : pay attention to the formats to align, otherwise errors are likely to occur.

---

Some common problems in practical applications

• The naming should not be too long : for example, using too long names like top-navigation will affect readability. It is recommended to be short and clear, such as header .

• Don't forget to set display: grid : Many novices will miss this sentence, causing the entire Grid layout to fail.

• Browser compatibility is good : mainstream modern browsers support grid-template-areas , but if you need to be compatible with older IE, you may want to consider other solutions.

---

Basically that's it. After mastering grid-template-areas , you will find that building web page layout becomes more like building blocks, with clear logic and easy to adjust.

The above is the detailed content of CSS Grid template areas tutorial for beginners. For more information, please follow other related articles on the PHP Chinese website!