How to determine the baseline of various types of boxes in HTML

This time I will show you how to determine the baseline of various types of boxes in HTML. What are the precautions for determining the baseline of various types of boxes in HTML. The following is a practical case. Let’s take a look. one time.

Rules for determining the baseline of the box

1.1 Determine the baseline of the inline-block

The baseline of an 'inline-block' is the baseline of its last line box in the normal flow, unless it has either no in-flow line boxes or if its 'overflow' property has a computed value other than 'visible', in which case the baseline is the bottom margin edge.

1.2 Determine the baseline of replacement

bottom margin edge

1.3 Determine the baseline of inline

That’s it The baseline of the text it contains

1.4 Determine the baseline of inline-table

The baseline of an 'inline-table' is the baseline of the first row of the table

1.5 Determine the baseline of the block

Each block generally contains many rows of elements, so it also has many baselines, each corresponding to a line-box. Determining the baseline of a line-box is a little complicated. See Chapter 2

1.6 Determine the baseline of each line of flex-box (may need to be changed in the future)

Take the baseline of the first line of text of the highest flex-item in a row as flex-box The baseline of the current line

1.7 Determine the baseline of the line-box (more complex)

First of all, unlike other types of boxes, CSS 2.1 does not define the position of the The line box's baseline, so its baseline is uncertain and will change as the content or style of the inline element changes. See the second section for details on how to change it

What factors will affect the position of the baseline of the line-box

When there is an elem in a line that is the same height as the line-box

Because The element is already the same height as the current line, so the vertical-align set on this elem has no visual effect on itself, but will affect the position of the baseline of the current line-box.

When there are multiple elements with different vertical-align values ​​in a row, the position of the line-box baseline will also be adjusted to satisfy all these vertical-align values ​​at the same time. Until it moves to the appropriate position, the height of the line-box will often change accordingly

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

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