To center the web page elements, you need to select the CSS method according to the scene. 1. Use text-align: center horizontally in the text or inline content; 2. Use margin: 0 auto to center the fixed wide block-level elements horizontally; 3. Use margin: 0 auto to center horizontally through display: flex, justify-content and align-items; 4. Use place-items: center to cleanly center the Grid layout. Different situations correspond to different solutions, and flexible application can accurately achieve the centering effect.

Want to center the elements in the webpage? Don’t underestimate this common requirement. The key is to use the CSS method in different scenarios. Simply put, there is no "universal" way of centering, you have to choose the method according to the type of element and layout structure you want to center.

You will most likely encounter the following situations, one by one:

1. Text or inline content is centered

This is the easiest centering operation, suitable for inline or inline-block elements such as text, buttons, and links.

 .container {
  text-align: center;
}

Add this code to the parent container you want to center, and the content inside will automatically be centered horizontally. Note: This only affects the inline content of the child , and the block-level elements will not be centered.

For example, if you are making a footer with several <a> tags inside, just add text-align: center to the footer and you will get it done.

2. Block-level elements are centered horizontally (such as divs, pictures)

If you have a block-level element with a fixed width, such as a div with a width of 200px, and want it to be horizontally centered in the page or parent container, you can use margin to automatically calculate it:

 .block {
  width: 200px;
  margin: 0 auto;
}

This method is only valid for block-level elements with width set. And it can only be centered horizontally, not vertically. Suitable for scenes such as boxes and cover pictures in the middle of the page.

3. Flexbox achieves overall centering (recommended modern practices)

Flexbox is one of the most commonly used and flexible centering methods at present, especially suitable for achieving horizontal and vertical centering in elastic layouts.

 .parent {
  display: flex;
  justify-content: center;
  align-items: center;
}

• justify-content: center controls horizontal direction centered
• align-items: center controls vertical centering

As long as you set the parent container to flex mode and set these two properties, the child elements inside can be easily centered. Whether it is a single element or multiple elements, it can adapt well.

Applicable scenarios include:

• Login box centered
• Pop-up content centered
• Card component arrangement, etc.

4. Grid Center: A More Modern Choice

CSS Grid can also be easily centered. Although it is not as commonly used as Flexbox, it has more advantages in some complex layouts.

 .parent {
  display: grid;
  place-items: center;
}

In one sentence, you can get horizontal and vertical centered. Simple and powerful. If you have used Grid layout or the project structure is relatively complex, this method is worth trying.

In general, which method to choose depends on your specific needs:

• Plain text? Use text-align
• Fixed wide block-level elements? Use margin: 0 auto
• Want to be centered horizontally and vertically at the same time? Flexbox priority
• Already use Grid? Try place-items

Basically all this is it, it's not difficult but it's easy to use the wrong place.

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