Home Web Front-end HTML Tutorial Why does z-index fail?

Why does z-index fail?

Feb 23, 2018 am 10:10 AM
z-index Why Invalid

We know that sometimes in the process of writing code, we will find that the z-index I wrote is invalid, so this time I will bring you why z-index will fail and why z-index is used. NotesWhat are the following? Let’s take a look at the actual cases.

1. The parent tag position attribute is relative;

2. The question tag has no position attribute (excluding static );

3. The question label contains float(float) attribute.

4. The z-index value of the ancestor tag of the question tag is relatively small.

If this is the case, only absolute and fixed positions are left.

I believe you have mastered the methods after reading these cases. For more exciting information, please pay attention to other related articles on the php Chinese website!

Related reading:

How to operate the child page of iframe to shield the page pop-up layer effect of the parent page


html standard writing method and What are the differences in the code generated by dreamweaver


How to achieve mixed graphics and text in html

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