滚动背景视觉差jQuery特效

PetitQ 图片/图形 2019-1-24 1.87K 0 1

这是一款带混合模式的 jquery 滚动背景视觉差特效。该特效利用 css mix-blend-mode 来混合背景和文字，并使用 jquery 来制作滚动时的视觉差效果，效果非常炫酷，在页面中引入 jquery 文件。

<script src=".js/jquery.min.js" type="text/javascript"></script>

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HTML 结构

视觉差效果的 HTML 结果如下。

```
<header>
```
```
  <div class="overlay">
```
```
    <div class="parallax">
```

      <h1>Awesome<span>Parallax Scrolling</span></h1>

```
      <div class="one"></div>
```
```
      <div class="two"></div>
```
```
      <div class="three"></div>
```
```
      <div class="four"></div>
```
```
      <div class="five"></div>
```
```
    </div>
```
```
  </div>
```
```
</header>
```

CSS 样式

然后添加下面的 CSS 样式。

```
*,
```
```
*:before,
```
```
*:after {
```
```
  box-sizing: border-box;
```
```
}
```
```
 
```
```
body {
```
```
  margin: 0;
```
```
  font-family: "Poppins", sans-serif;
```
```
  font-size: 62.5%;
```
```
}
```
```
 
```
```
::-webkit-scrollbar {
```
```
  width: 0;
```
```
}
```
```
 
```
```
header {
```
```
  position: relative;
```
```
  height: 100vh;
```
```
  overflow: hidden;
```
```
  display: flex;
```
```
  justify-content: center;
```
```
  align-items: center;
```
```
  background-color: #c6d9d3;
```
```
}
```
```
header .overlay {
```
```
  position: absolute;
```
```
  top: 0;
```
```
  left: 0;
```
```
  width: 100%;
```
```
  height: 100%;
```
```
}
```
```
header .overlay h1 {
```
```
  position: absolute;
```
```
  top: 50%;
```
```
  left: 50%;
```
```
  transform: translate(-50%, -50%);
```
```
  z-index: 3;
```
```
  margin: 0;
```
```
  text-transform: uppercase;
```
```
  text-align: center;
```
```
  font-size: 9rem;
```

  text-shadow: 25px -15px rgba(25, 42, 46, 0.04);

```
  color: #142124;
```
```
  mix-blend-mode: overlay;
```
```
}
```
```
header .overlay h1 span {
```
```
  margin-top: -2em;
```
```
  padding-top: 0.5em;
```
```
  display: block;
```
```
  letter-spacing: 5px;
```
```
  font-size: 1.25rem;
```
```
}
```
```
header .parallax {
```
```
  position: relative;
```
```
  width: 100%;
```
```
  height: 100%;
```
```
}
```
```
header .parallax div {
```
```
  position: absolute;
```
```
  bottom: 0;
```
```
  left: 0;
```
```
  width: 100%;
```
```
  height: 100%;
```
```
  background-position: 0 50%;
```
```
  background-repeat: no-repeat;
```
```
  background-size: 100%;
```
```
}
```
```
header .parallax .one {
```

  background-image: url("svg/mountains-1.svg");

```
  z-index: 4;
```
```
}
```
```
header .parallax .two {
```

  background-image: url("svg/mountains-2.svg");

```
  z-index: 3;
```
```
}
```
```
header .parallax .three {
```

  background-image: url("svg/mountains-3.svg");

```
  z-index: 2;
```
```
}
```
```
header .parallax .four {
```

  background-image: url("svg/mountains-4.svg");

```
  z-index: 1;
```
```
}
```
```
header .parallax .five {
```

  background-image: url("svg/mountains-5.svg");

```
  z-index: 0;
```
```
}
```

初始化插件

在页面 DOM 元素加载完毕之后，通过下面的方法来初始化该滚动视觉差效果。

```
$(window).scroll(function () {
```
```
  var a = $(this).scrollTop();
```
```
  var b = 800;
```
```
  $("h1").css({
```

    backgroundPosition: "center " + a / 2 + "px" });

```
 
```
```
  $(".parallax").css({
```
```
    top: a / 1.6 + "px",
```
```
    opacity: 1 - a / b });
```
```
 
```
```
});
```
```
 
```
```
// parallax scrolling
```
```
 
```

document.addEventListener("scroll", () => {

```
  var top = window.pageYOffset,
```

  var one = document.querySelector(".one"),

  var two = document.querySelector(".two"),

  var three = document.querySelector(".three"),

  var four = document.querySelector(".four"),

  var five = document.querySelector(".five");

```
 
```

  one.style.bottom = -(top * 0.1) + "px";

  two.style.bottom = -(top * 0.2) + "px";

  three.style.bottom = -(top * 0.3) + "px";

  four.style.bottom = -(top * 0.4) + "px";

  five.style.bottom = -(top * 0.5) + "px";

```
});
```

Codepen 网址：https://codepen.io/andrejsharapov/pen/aPrNxP

滚动背景视觉差 jQuery 特效

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图片/图形

滚动背景视觉差jQuery特效

HTML 结构

CSS 样式

初始化插件

滚动背景视觉差 jQuery 特效

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滚动背景视觉差 jQuery 特效

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