用css3實現驚豔面試官的背景即背景動畫（高級附源碼）

時間  2019-11-11
標籤 css3 css 實現 驚豔 面試 背景 動畫 高級 源碼 欄目 CSS 简体版
原文   原文鏈接

clipboard.png

咱們傳統的前端更多的是用javascript實現各類複雜動畫，自從有了Css3 transition和animation以來,前端開發在動畫這一塊有了更高的自由度和格局,對動畫的開發也愈來愈容易。這篇文章就讓咱們彙總一下使用Css3實現的各類特效。這篇文章參考《css揭祕》這本書，並做出了本身的總結，但願能讓你們更有收穫，也強烈推薦你們看看這本書，你值得擁有。
咱們將學到javascript

Css3
outline
radial-gradient
linear-gradient
box-shadowcss

程序員必讀
Css3編碼技巧前端

1.實現內部虛線邊框
知識點：outlinejava

clipboard.png

核心代碼css3

.dash-border{
  width: 200px;
  height: 100px;
  line-height: 100px;
  outline: 1px dashed #fff;
  outline-offset: -10px;
}

2.邊框內圓角的實現
知識點：box-shadow程序員

clipboard.png
核心代碼app

.radius-border{
  margin-top: 20px;
  width: 180px;
  height: 80px;
  box-shadow: 0 0 0 10px gray;
}

3.實現條紋背景與進度條
知識點：linear-gradient,repeating-linear-gradientpost

clipboard.png
核心代碼動畫

/* 上 */
background: linear-gradient(to right,#fb3 50%,#58a 0);
background-size: 40px 100%;
box-shadow: inset 0 0 3px #555;

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


/* 下 (能夠實現任意角度的漸變，45°時顯示效果最好) */
background: repeating-linear-gradient(60deg,#fb3,#fb3 15px,#58a 0,#58a 30px);

4.複雜的背景圖案
知識點：linear-gradient,repeating-linear-gradient,radial-gradient編碼

clipboard.png
因爲第二個圖會有複雜的隨機動畫，建議你們能夠親自嘗試看看效果，核心代碼

<style>
.bg-grid{
  margin-top: 20px;
  width: 200px;
  height: 200px;
  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%;
}
.animate-grid{
  animation: move-grid 6s linear infinite;
}
@keyframes move-grid{
  0%{
    background-position: -50px -50px;
  }
  30%{
    background-position: -100px -100px;
  }
  60%{
    background-position: -100px -150px;
  }
  100%{
    background-position: -50px -50px;
  }
}
</style>
<div class="bg-grid black-theme"></div>
<div class="bg-grid black-theme animate-grid"></div>

紅綠燈以及紅路燈隨機運動動畫

clipboard.png
利用css3多背景和position實現紅綠燈和背景色塊移動
核心代碼

<style>
.bg-dot{
  margin-top: 20px;
  width: 200px;
  height: 50px;
  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;
}
.animate-dot{
  animation: move-dot 8s linear infinite;
}
.animate-dot2{
  animation: move-dot2 6s linear infinite;
}
@keyframes move-dot{
  0%{
    background-position: 0 0, 50px 0, 100px 0, 150px 0;
  }
  30%{
    background-position: 50px 0, 0 0, 100px 0, 150px 0;
  }
  60%{
    background-position: 50px 0, 100px 0, 0 0, 150px 0;
  }
  100%{
    background-position: 50px 0, 100px 0, 150px 0, 0 0;
  }
}
@keyframes move-dot2{
  0%{
    background-image: radial-gradient(circle,#0cf 15px,transparent),
                    radial-gradient(circle,gray 15px,transparent),
                    radial-gradient(circle,gray 15px,transparent),
                    radial-gradient(circle,gray 15px,transparent);
  }
  30%{
    background-image: radial-gradient(circle,gray 15px,transparent),
                    radial-gradient(circle,red 15px,transparent),
                    radial-gradient(circle,gray 15px,transparent),
                    radial-gradient(circle,gray 15px,transparent);
  }
  60%{
    background-image: radial-gradient(circle,gray 15px,transparent),
                    radial-gradient(circle,gray 15px,transparent),
                    radial-gradient(circle,yellow 15px,transparent),
                    radial-gradient(circle,gray 15px,transparent);
  }
  100%{
    background-image: radial-gradient(circle,gray 15px,transparent),
                    radial-gradient(circle,gray 15px,transparent),
                    radial-gradient(circle,gray 15px,transparent),
                    radial-gradient(circle,green 15px,transparent);
  }
}
</style>
<div class="bg-dot black-theme animate-dot"></div>
<div class="bg-dot black-theme animate-dot2"></div>

棋盤背景以及棋盤背景隨機動畫

clipboard.png
利用背景漸變實現棋盤圖案
核心代碼

<style>
.bg-qi{
  margin-top: 20px;
  width: 200px;
  height: 200px;
  background-color: #eee;
  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;
  box-shadow: 2px 2px 4px rgba(0,0,0,.4);
}

</style>
<div class="bg-qi black-theme"></div>

僞隨機背景

clipboard.png
利用背景漸變，keyframe動畫，實現複雜的僞隨機動畫
核心代碼

<style>
.bg-line-rand{
  margin-top: 20px;
  width: 480px;
  height: 60px;
  background-color: #eee;
  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%;
  box-shadow: 2px 2px 4px rgba(0,0,0,.4);
}
.bg-dot-rand{
  margin-top: 20px;
  width: 200px;
  height: 200px;
  background-color: #eee;
  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;
  box-shadow: 2px 2px 4px rgba(0,0,0,.4);
}
.animate1{
  animation: move 4s linear infinite;
}
.animate2{
  animation: move2 4s linear infinite;
}
@keyframes move{
  0%{
    background-position: 0 0, 0 0, 0 0;
  }
  50%{
    background-position: -10px 0, 20px 0, 30px 0;
  }
  100%{
    background-position: 0 0, 30px 0, 10px 0;
  }
}
@keyframes move2{
  0%{
    background-position: 0 0, 0 0, 0 0;
  }
  50%{
    background-position: -10px 30px, 20px 0, -40px 80px;
  }
  100%{
    background-position: 0 20px, 60px -20px, 10px 30px;
  }
}
</style>
<div class="bg-line-rand black-theme"></div>
<div class="bg-line-rand black-theme animate1"></div>
<div class="bg-dot-rand black-theme animate2"></div>

5.折角效果
知識點：linear-gradient

clipboard.png
核心代碼

<style>
.fold{
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 20px;
  width: 200px;
  height: 80px;
  color: #fff;
  line-height: 80px;
  text-align: center;
  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);
}
.linear{
  background: linear-gradient(to left bottom,transparent 50%,rgba(0,0,0,.5)) no-repeat 100% 0 / 2em 2em,
              linear-gradient(-135deg,transparent 1.4em,#06c);
}
</style>
<div class="fold">折角效果哦</div>
<div class="fold linear">折角效果哦</div>

2.內陰影圓折角效果

clipboard.png
核心代碼

<style>
.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: inheri
  box-shadow: -.2em .2em .3em -.1em rgba(0,0,0,.15);
}

</style>
<div class="fold-1">折角效果哦</div>

6.自適應文本的條紋背景
知識點：linear-gradient,line-height,background-origin

clipboard.png
核心代碼

<style>
.stripe-bg{
  padding: .5em;
  line-height: 1.5em;
  background: beige;
  background-size: auto 3em;
  background-origin: content-box;
  background-image: linear-gradient(rgba(0,0,0,.2) 50%, transparent 0);
}
.stripe-bg > p{
  margin: 0;
}
</style>
<div class="stripe-bg">
  <p>hello you</p>
  <p>hello you</p>
  <p>hello you</p>
  <p>hello you</p>
  <p>hello you</p>
</div>

7.自定義的下劃線實現
知識點linear-gridient

clipboard.png
小夥伴們注意到了嗎？默認的下劃線會將文字穿過，而上面的不會呦！

核心代碼

<style>
.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;
}
</style>
<div class=""><span class="my-line">i have your big apple.you have a too? hi hi hi.</span></div>

做者：徐小夕
連接：https://juejin.im/post/5d86fc...來源：掘金著做權歸做者全部。商業轉載請聯繫做者得到受權，非商業轉載請註明出處。

相關文章
相關標籤/搜索
每日一句
    每一个你不满意的现在，都有一个你没有努力的曾经。
本站公眾號
   歡迎關注本站公眾號,獲取更多信息
聯繫我們 最近搜索 最新文章 沪ICP备13005482号-10 MyBatis教程 SQL 教程 MySQL教程 Java 教程 Thymeleaf 教程 Hibernate教程 Spring教程 Redis教程