在CSS里,border是控制对象的边框边线宽度、颜色、虚线、实线等样式的CSS属性。border属性多种多样,今天就来给大家说一些关于操作border的小技巧。
DIV+CSS边框border知识教程篇
Html表格控制边框:
border="1" bordercolor="#000000"
说明:控制表格边框宽度为1px,css颜色为黑色,默认为实线样式边框。
border-left 设置左边框,一般单独设置左边框样式使用
border-right 设置右边框,一般单独设置右边框样式使用
border-top 设置上边框,一般单独设置上边框样式使用
border-bottom 设置下边框,一般单独设置下边框样式使用,有时可将下边框样式作为css下划线效果应用。
四边相同边框border简写
#divcss5{border:1px solid #00F}
设置了divcss5对象盒子1px像素蓝色实线边框
边框三个样式
通常我们可以对边框设置宽度(厚度)、边框样式、边框颜色这三个属性与参数。
边框颜色:border-color:#000
边框厚度(宽度):border-width:1px
使用数字+单位设置边框厚度宽度,如1px(边框厚度宽度为1像素),边框必须为正数字,大于0的数值。否则设置边框border样式无效。
border边框样式:border-style:solid
none : 无边框。与任何指定的border-width值无关
hidden : 隐藏边框。IE不支持
dotted : 在MAC平台上IE4+与WINDOWS和UNIX平台上IE5.5+为点线。否则为实线(常用)
dashed : 在MAC平台上IE4+与WINDOWS和UNIX平台上IE5.5+为虚线。否则为实线(常用)
solid : 实线边框(常用)
double : 双线边框。两条单线与其间隔的和等于指定的border-width值
groove : 根据border-color的值画3D凹槽
ridge : 根据border-color的值画菱形边框
inset : 根据border-color的值画3D凹边
outset : 根据border-color的值画3D凸边
CSS单独设置左边框、右边框、上边框、下边框 - TOP
以缩写方式写上、下、左、右边框单独CSS样式设置方法
1、1px黑色虚线上边框
border-top:1px dashed #000
2、1px黑色实线下边框
border-bottom:1px solid #000
3、1px黑色虚线左边框
border-left:1px dashed #000
4、1px黑色实线右边框
border-right:1px solid #000
常用推荐边框样式
我们通常使用主流浏览器兼容边框样式有:
实线边框:solid
Border:1px solid #000 设置对象1px(像素)宽厚的黑色实线边框。
虚线边框:dashed
Border:1px dashed #000 设置对象1px(像素)宽厚的黑色虚线边框。
css border边框用处
设置对象边框样式,设置单独上边框、下边框、左边框、右边框样式,实现美化美观。边框起到分割、规划布局作用。
描述:为了观察案例效果我们设置一个css宽度为200px,css高度1px,红色实线边框的DIV盒子
CSS代码:
#divcss5{height:100px;width:200px;border:1px solid #F00}
HTML代码对应片段:
We use DIV CSS to set the border style. Generally, we use the abbreviation expression to set the object border style, which saves code and simplifies the code function. Whether setting a single border or a four-sided border, we try to abbreviate the CSS border code, which is the abbreviation of CSS border optimization. Commonly used attribute codes for setting CSS styles on objects are: border:1px solid #000;.
Three sides have edges but one side has no setting skills
CSS code: border:1px solid #000; border-top:none;
Be sure to pay attention to one thing, border: The order of 1px solid #000; and border-top:none; cannot be exchanged. Because CSS reading has the principle of reading from top to bottom and from left to right, it is meaningless to set the entire border style first and then declare the top border to "none", that is, to achieve the style required by this instance. This eliminates the need to set the bottom, left, and right settings separately, thereby saving a certain amount of code. As long as you follow the normal code logic, you will be able to master borders proficiently.
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