效果原理
主要利用css渐变实现一些不需要切图的背景镂空
优惠券样式
.mixinsTicket(@width, @height, @r, @left, @lcolor, @rcolor) { width: @width; height: @height; background: radial-gradient(circle at top right, transparent @r, @lcolor 0) -(@width - @left) top ~/ 100% 51% no-repeat, radial-gradient(circle at bottom right, transparent @r, @lcolor 0) -(@width - @left) bottom ~/ 100% 51% no-repeat, radial-gradient(circle at top left, transparent @r, @rcolor 0) @left 0 ~/ 100% 51% no-repeat, radial-gradient(circle at bottom left, transparent @r, @rcolor 0) @left bottom ~/ 100% 51% no-repeat;}
.mixinsTicket1(@width, @height, @r, @top, @color) { width: @width; height: @height; background: radial-gradient(circle at bottom left, transparent @r, @color 0) left (@top - @height) ~/ 51% 100% no-repeat, radial-gradient(circle at top left, transparent @r, @color 0) left @top ~/ 51% 100% no-repeat, radial-gradient(circle at bottom right, transparent @r, @color 0) right (@top - @height) ~/ 51% 100% no-repeat, radial-gradient(circle at top right, transparent @r, @color 0) right @top ~/ 51% 100% no-repeat; &::after{ content: ; display: block; position: absolute; width: calc(100% - 2 * @r); left: @r; top: @top; border-top: 1px dashed #fff; transform: translateY(.5); }}
切角效果
ps: 锯齿跟设备的显示有关系
.mixinFlag(@width, @height, @bg) when(default()) { width: @width; height: @height; background: linear-gradient(45deg, transparent sqrt(pow(@width/2, 2)/2), @bg 0) right, linear-gradient(-45deg, transparent sqrt(pow(@width/2, 2)/2), @bg 0) left; background-size: 50% 100%; background-repeat: no-repeat; } .mixinFlag(@width, @height, @bg) when(@width > @height) { width: @width; height: @height; background: linear-gradient(-45deg, transparent sqrt(pow(@height/2, 2)/2), @bg 0) top left, linear-gradient(-135deg, transparent sqrt(pow(@height/2, 2)/2), @bg 0) bottom left; background-size: 100% 50%; background-repeat: no-repeat;}
.mixinsMark(@width, @height, @bg) { width: @width; height: @height; background: linear-gradient(-45deg, transparent sqrt(pow(@height/2, 2)/2), @bg 0) bottom left, linear-gradient(-135deg, transparent sqrt(pow(@height/2, 2)/2), @bg 0) top left; background-size: 100% 50%; background-repeat: no-repeat;}
ps:以上效果四个方向都可以实现,其他方向代码没有贴出,原理相同
格子布
css { width: 510px; height: 128px; background: #FFF; background-image: linear-gradient(rgba(182, 128, 102, .8) 8px, transparent 0), linear-gradient(90deg, rgba(182, 128, 102, .8) 8px, transparent 0); background-size: 8px 14px, 14px 8px;}
焦点
.mask { position: fixed; top: 0; left: 0; z-index: 100; width: 100vw; height: 100vh; background: radial-gradient(closest-side at 50% 278rpx, transparent 140rpx, rgba(0, 0, 0, .12) 180rpx, rgba(0, 0, 0, .22) 200rpx, rgba(0,0,0,.3) 220rpx, rgba(0,0,0, .4)) no-repeat;}
总结
每一层渐变都可被当做一张背景图,也就是说每一层渐变都可以指定其position、size、repeat。玩过PS的的同学应该知道图层的概念,咱们的背景图层叠原理也类似(当然,渐变也可以当背景图),控制渐变的大小,哪里需要镂空,以及需要显示的位置、是否平铺,就可以实现大多数场景下的基本效果,当然,一张切图来的更快,但是有时候切图并不能适应所有的场景。
掌握background的书写顺序可以帮助在脑海中构思自己想要的效果:
复制代码代码如下:background: bg-color || bg-image || bg-position [ / bg-size]? || bg-repeat || bg-attachment || bg-origin || bg-clip
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。