How to make a flexible box in css3
Sometimes we need to write a flexible box in CSS3, so how to make this code? This requires the use of our box-shadow attribute, which allows the box to produce a shadow effect when displayed. Here is a detailed explanation of how to write
:
box-shadow:length length length color;
The first parameter represents the horizontal distance of the shadow from the box
The second parameter represents the vertical distance of the shadow from the box
The third parameter represents the blur radius of the shadow
The fourth parameter represents the color of the shadow
Use shadows for elements in the box
You can individually apply shadows to the elements in the box Elements use shadows.
You can use the first-letter selector or the first-line selector to only have the first text or the first line have a
shadow effect
for the table Use shadows in cells
You can use the box-shadow property to create a shadow effect on tables and cells within the table.
Specify the calculation method for the width and height of the element
In css3, use the box-sizing attribute to specify the calculation method for the width and height of the element
box- Sizing attribute
In CSS, use the width attribute and height attribute to specify the width and height of the element.
But using the box-sizing attribute, you can specify whether the width and height values specified with the width attribute and height attribute respectively include the padding area inside the element, as well as the width and height of the border.
The attribute values that can be specified for the box-sizing attribute are the content-box attribute value and the border-box attribute value. The former means that the width and height of the element do not include the internal padding area, and the width and height of the border
, while the latter means that the width and height of the element include the internal padding area, and the width and height of the border.
Previously, the default was to use the content-box attribute value.
In addition, you can specify the attribute value
in the box-sizing attribute as
padding-box, that is, the specified width and height content include The width and height of the content and the width and height of the inner padding area, excluding the width and height of the border
The purpose of use is to control the total width of the element , if this attribute is not used, the
used by default in the style is the content-box attribute value, which only specifies the width of the content, but does not specify the
total width of the element. Make the designation.
In some cases, using the border-box attribute value will make
page layoutmore convenient.
For example, as long as the border-box attribute value of the two div elements is set to 50%, you can ensure that the two div
elements are displayed side by side. This is how to make a flexible box. For more exciting information, please pay attention to other related articles on the php Chinese website!
Related reading:
How to insert pictures in html What should you pay attention to when centering a div in htmlHow to use if comments in htmlThe above is the detailed content of How to make a flexible box in css3. For more information, please follow other related articles on the PHP Chinese website!

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