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CSS-右下角的边框半径 | border-bottom-right-radius

日期：2018-09-12点击：652收藏

该border-bottom-right-radius属性设置元素右下角的舍入。

/* The corner is a circle */ /* border-bottom-right-radius: radius */ border-bottom-right-radius: 3px; /* Percentage values */ border-bottom-right-radius: 20%; /* corner of a circle if box is a square or else corner of a rectangle */ border-bottom-right-radius: 20% 20%; /* same as above */ /* 20% of horizontal(width) and vertical(height) */ border-bottom-right-radius: 20% 10%; /* 20% of horizontal(width) and 10% of vertical(height) */ /*The corner is an ellipsis */ /* border-bottom-right-radius: horizontal vertical */ border-bottom-right-radius: 0.5em 1em; border-bottom-right-radius: inherit;

舍入可以是圆或椭圆，或者如果其中一个值是0没有圆角，拐角处是正方形的。

背景(图像或颜色)在边框中被裁剪，甚至是圆形的；裁剪的确切位置由background-clip财产。

如果此属性的值未在border-radius属性之后应用于元素的速记属性。border-bottom-right-radius属性将此属性的值重置为初始值。速记性质...

Initial value	0
Applies to	all elements; but User Agents are not required to apply to table and inline-table elements when border-collapse is collapse. The behavior on internal table elements is undefined for the moment.. It also applies to ::first-letter.
Inherited	no
Percentages	refer to the corresponding dimension of the border box
Media	visual
Computed value	two absolute <length>s or <percentage>s
Animation type	a length, percentage or calc();
Canonical order	the unique non-ambiguous order defined by the formal grammar

句法

只有一个价值：

值是<length>或者是<percentage>表示圆圈的半径，用于那个角落的边框。有两个值：

第一个值是<length>或者是<percentage>表示省略号的水平半长轴，用于该角的边框。

第二个值是<percentage>表示省略号的垂直半长轴，用于该角的边框。

值

<length-percentage>表示圆周半径的大小，或省略的半长和半短轴的大小。作为绝对长度，它可以用css允许的任何单位表示。<length>数据类型。水平轴的百分比指框的宽度，垂直轴的百分比指框的高度。负值无效。

形式语法

<length-percentage>{1,2}where <length-percentage> = <length> | <percentage>

实例

Live example	Code
.	An arc of circle is used as the border div { border-bottom-right-radius: 40px 40px; }
.	An arc of ellipse is used as the border div { border-bottom-right-radius: 40px 20px; }
.	The box is a square: an arc of circle is used as the border div { border-bottom-right-radius: 40%; }
.	The box is not a square: an arc of ellipse is used as the border div { border-bottom-right-radius: 40%; }
.	The background color is clipped at the border div { border-bottom-right-radius:40%; border-style: black 3px double; background-color: rgb(250,20,70); background-clip: content-box; }

规范

Specification	Status	Comment
CSS Backgrounds and Borders Module Level 3The definition of 'border-bottom-right-radius' in that specification.	Candidate Recommendation	Initial definition

浏览器兼容性

Feature	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic Support	4 1 -webkit-	(Yes) (Yes) -webkit-	41 49 -webkit- 2 1 — 12 (as -moz-border-radius-topright)	9	10.5	5 3 -webkit-
Percentages	4	(Yes)	4 13	9	10.5	5
Ellipitcal corners	1	(Yes)	3.5	9	10.5	3