自从有了Css3 transition和animation以来,前端开发在动画这一块有了更高的自由度和格局,对动画的开发也越来越容易.这篇文章就让我们汇总一下使用Css3实现的各种特效.

程序员必读

Css3编码技巧

1.实现内部虚线边框

知识点：outline

hello world

核心代码

// css
.dash-border{
  outline: 1px dashed #fff;
  outline-offset: -10px;
}

2.边框内圆角的实现

知识点：box-shadow

核心代码

1	box-shadow: 0 0 0 10px gray;

3.实现条纹背景与进度条

知识点：linear-gradient,repeating-linear-gradient

核心代码

// 上
background: linear-gradient(to right,#fb3 50%,#58a 0);
background-size: 40px 100%;

// 中
background: linear-gradient(45deg,#fb3 25%,#58a 0,#58a 50%,#fb3 0,#fb3 75%,#58a 0);
background-size: 40px 40px;

// 下 (可以实现任意角度的渐变，45°时显示效果最好)
background: repeating-linear-gradient(60deg,#fb3,#fb3 15px,#58a 0,#58a 30px);

4.复杂的背景图案

知识点：linear-gradient,repeating-linear-gradient,radial-gradient

核心代码

// 1
background-image: linear-gradient(rgba(255,255,255,1) 2px,transparent 0),
                  linear-gradient(to right,rgba(255,255,255,1) 2px,transparent 0),
                  linear-gradient(rgba(255,255,255,.2) 1px,transparent 0),
                  linear-gradient(to right,rgba(255,255,255,.2) 1px,transparent 0);
  background-position: -50px -50px;
  background-size: 100px 100px,100px 100px, 100% 10px, 10px 100%;

核心代码

// 利用css3多背景和position实现红绿灯和背景色块移动
background-image: radial-gradient(circle,#0cf 15px,transparent),
                    radial-gradient(circle,red 15px,transparent),
                    radial-gradient(circle,yellow 15px,transparent),
                    radial-gradient(circle,green 15px,transparent);
  background-repeat: no-repeat;
  background-position: 0 0, 50px 0, 100px 0, 150px 0, 200px 0;
  background-size: 50px 50px;

核心代码

// 利用背景渐变实现棋盘图案
background-image: linear-gradient(45deg,rgba(0,0,0,.25) 25%,transparent 0,transparent 75%,rgba(0,0,0,.25) 0),
                  linear-gradient(45deg,rgba(0,0,0,.25) 25%,transparent 0,transparent 75%,rgba(0,0,0,.25) 0);
background-position: 0 0, 20px 20px;
background-size: 40px 40px;

伪随机背景

核心代码

// 利用背景渐变实现棋盘图案
/*线性*/
background-image: linear-gradient(90deg,#fb3 11px, transparent 0),
                    linear-gradient(90deg,#ab4 23px, transparent 0),
                    linear-gradient(90deg,#655 41px, transparent 0);
  background-size: 41px 100%, 61px 100%, 83px 100%;

/*径向*/
background-image: radial-gradient(circle,#fb3 5px, transparent 0),
                    radial-gradient(circle,#ab4 13px, transparent 0),
                    radial-gradient(circle,#655 31px, transparent 0);
background-repeat: no-repeat;
background-size: 101px 203px, 147px 60px, 373px 201px;

5.折角效果

知识点：linear-gradient

1.折角效果

折角效果哦

核心代码

1 2	background: linear-gradient(to left bottom,transparent 50%,rgba(0,0,0,.5) 0) no-repeat 100% 0 / 2em 2em, linear-gradient(-135deg,transparent 1.4em,#06c 0);

2.内阴影圆折角效果

折角效果哦

核心代码

.fold-1{
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 20px;
  position: relative;
  width: 200px;
  height: 80px;
  border-radius: .5em;
  color: #fff;
  line-height: 80px;
  text-align: center;
  background: linear-gradient(-150deg,transparent 1.5em, #58a 0);
}
.fold-1::before{
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  background: linear-gradient(to left bottom,transparent 50%,rgba(0,0,0,.2) 0,rgba(0,0,0,.4)) 100% 0 no-repeat;
  width: 1.73em;
  height: 3em;
  transform: translateY(-1.3em) rotate(-30deg);
  transform-origin: bottom right;
  border-bottom-left-radius: inherit;
  box-shadow: -.2em .2em .3em -.1em rgba(0,0,0,.15);
}

6.自适应文本的条纹背景

知识点：linear-gradient,line-height,background-origin

hello you

7.自定义的下划线实现

知识点linear-gridient

i have your big apple.you have a too? hi hi hi.

小伙伴们注意到了吗？默认的下划线会将文字穿过，而上面的不会呦！

# 核心代码
.my-line{
  line-height: 1.4em;
  background: linear-gradient(gray,gray) no-repeat;
  background-size: 100% 1px;
  background-position: 0 1.15em;
  text-shadow: .05em 0 #fff, -.05em 0 #fff;
}

前端,node,MySQL

border和background篇