css边框的最简方式(CSS设置边框的几个技巧)
css边框的最简方式(CSS设置边框的几个技巧)现在我们已经掌握这几方式,但本文的重点是上面这种,我们现在来动手操练下:background: linear-gradient(90deg #333 50% transparent 0) repeat-x 0 0px/9px 1px linear-gradient(90deg #333 50% transparent 0) repeat-x 0 100%/9px 1px linear-gradient(0deg #333 50% transparent 0) repeat-y 0 0/1px 9px linear-gradient(0deg #333 50% transparent 0) repeat-y 100% 0px/1px 9px #ffffff; 可见,使用background非常的灵活,边框的位置可以任意调整。bor
设置边框最常使用border,比如这样:
border: 1px dashed #333;
    

这是最常规的方法了,今天再来说说其他两种方法,
- outline方式
 - background方式
 
这也算是一种比较常规的方法了,
outline: 1px solid;
    

但需要注意的是,outline是在容器的最外部,与border的渲染还是有点区别的,同时对比下:
border: 1px dashed #333;
outline: 1px solid;
    

外部实线是outline,内部虚线是border,为了一致,可以设置outline-offset往内缩一点:
outline-offset: -1px;
background方法
    
这是本文的重点,我也是刚get到此项技能,之前一直不知道background居然如此强大,直接上代码:
background: linear-gradient(90deg  #333 50%  transparent 0) repeat-x 0 0px/9px 1px  #ffffff;
    

这里我们只设置了上面看,而且还是虚线的,做一说明这种方式的强大,再把其他边框补上去:
background: 
		linear-gradient(90deg  #333 50%  transparent 0) repeat-x 0 0px/9px 1px 
    linear-gradient(90deg  #333 50%  transparent 0) repeat-x 0 100%/9px 1px 
    linear-gradient(0deg  #333 50%  transparent 0) repeat-y 0 0/1px 9px 
    linear-gradient(0deg  #333 50%  transparent 0) repeat-y 100% 0px/1px 9px 
    #ffffff;
    

可见,使用background非常的灵活,边框的位置可以任意调整。
现在我们已经掌握这几方式,但本文的重点是上面这种,我们现在来动手操练下:
渐变边框background: linear-gradient(90deg  #29bdd9 0%  #276ace 100%) repeat-x 0 0/100% 5px
     
    linear-gradient(-90deg  #29bdd9 0%  #276ace 100%) repeat-x 0 100%/100% 4px 
    linear-gradient(180deg  #29bdd9 0%  #276ace 100%) repeat-y 0 0/4px 100% 
    linear-gradient(0deg  #29bdd9 0%  #276ace 100%) repeat-y 100% 0/4px 100% 
    #eee;
    

.box {
  background:
     linear-gradient(90deg  #333 50%  transparent 0) repeat-x 
     linear-gradient(90deg  #333 50%  transparent 0) repeat-x 
     linear-gradient(0deg  #333 50%  transparent 0) repeat-y 
     linear-gradient(0deg  #333 50%  transparent 0) repeat-y;
     background-size: 4px 1px  4px 1px  1px 4px  1px 4px;
     background-position: 0 0  0 100%  0 0  100% 0;
}
.box:hover {
  animation: linearGradientMove .3s infinite linear;
}
@keyframes linearGradientMove {
    100% {
        background-position: 4px 0  -4px 100%  0 -4px  100% 4px;
    }
}
    

.box {
  background:
     linear-gradient(90deg  #FF8235 #30E8BF  #FF8235) repeat-x 
     linear-gradient(90deg  #FF8235 #30E8BF  #FF8235) repeat-x 
     linear-gradient(0deg  #FF8235 #30E8BF  #FF8235)  repeat-y 
     linear-gradient(0deg  #FF8235 #30E8BF  #FF8235)  repeat-y;
     background-size: 100% 8px  100% 8px  8px 100%  8px 100%;
     background-position: 0 0  0 100%  0 0  100% 0;
}
.box:hover {
  animation: linearGradientMove 1s infinite linear;
}
@keyframes linearGradientMove {
    100% {
        background-position: 200px 0  -200px 100%  0 -200px  100% 100px;
    }
}
    

以上就是设置边框的几个小技巧。
参考:
https://www.cnblogs.com/coco1s/p/14291567.html




