How to achieve horizontal middle alignment? _html/css_WEB-ITnose

The table is aligned in the middle. There is no need to add a div outside. As long as

margin:0 auto; can be centered. Of course, the width of your current layer must be smaller than the previous layer to see the effect.

Sometimes, width, margin:0 auto; must be defined for it to take effect

Take a look at the csdn forum, the source code of this page.
body of
#bbscsdn_wrap {
background: white;
width: 960px;
margin: 0 auto;
}

because you used absolute

does not set width; margin has no effect

Because you used position:absolute, you can only use left to achieve horizontal centering.

Because you used position:absolute, you can only use left to achieve horizontal centering.
What does left mean?

Because you used position:absolute, you can only use left to achieve horizontal centering.
Do you mean the left of position?

Quoting the reply from yueshangchuanqi on the 13th floor:

Because you used position:absolute, you can only use left to achieve horizontal centering.

Do you mean the left of position?

Well, I explained it in my reply above.

Quoted from the 16th floor rosecshly0928's reply:
Quoted from the 13th floor yueshangchuanqi's reply:

Because you used position:absolute, you can only use left to achieve horizontal centering.

Do you mean the left of position?


Well, I explained it in my reply above.
Thank you, I tried it, because using absolute, removing this or setting left can align it.

Quote from 17th floor yueshangchuanqi’s reply:

Quote from 16th floor rosecshly0928’s reply:
Quote from 13th floor yueshangchuanqi’s reply:

Because you used position:absolute So You can only use left to achieve horizontal centering.

Do you mean the left of position?


Well, I explained it in my reply above.

Thank you, I tried it, just because I used absolu...

Haha, that’s it. It’s solved.