svg实现视频背景蒙版滚动效果代码-html代码-BFW代码库

代码语言：html

所属分类：背景

代码描述：svg实现视频背景蒙版滚动效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en" >

<head>
  <meta charset="UTF-8">
  
  <meta
      name="viewport"
      content="width=device-width, initial-scale=1, user-scalable=0, maximum-scale=1.0"
    />
  
  
  
<style>
@import url('//repo.bfw.wiki/bfwrepo/css/normalize.5.0.css') layer(normalize);

@layer normalize, base, demo, scroll, debug;

@layer scroll {
  @supports (animation-timeline: scroll()) {
    @property --active {
      initial-value: 0;
      inherits: true;
      syntax: '<number>';
    }

    p span {
      -webkit-animation: activate both ease-in-out;
              animation: activate both ease-in-out;
      animation-timeline: view();
      opacity: 0;
    }

    @-webkit-keyframes activate {
      50% {
        opacity: 1;
      }
    }

    @keyframes activate {
      50% {
        opacity: 1;
      }
    }

    :root {
      --scroll-ease: linear(
        -0 0%,
        0.0048 9.8%,
        0.0192 19.5%,
        0.043 29.02%,
        0.0761 38.26%,
        0.1181 47.13%,
        0.1685 55.56%,
        0.227 63.44%,
        0.2929 70.71%,
        0.3656 77.3%,
        0.4445 83.15%,
        0.5285 88.19%,
        0.6173 92.39%,
        0.7099 95.7%,
        0.805 98.08%,
        0.9021 99.52%,
        1 100%
      );
    }

    .section__content svg:nth-of-type(1) path {
      --dest: 0;
      stroke-dashoffset: 1.025;
      stroke-dasharray: 1.025;
      -webkit-animation: draw both var(--scroll-ease);
              animation: draw both var(--scroll-ease);
      animation-timeline: view();
      animation-range: entry 25% entry 75%;
    }

    .section__content {
      margin-bottom: 15vh;
    }

    .section__buffer {
      position: absolute;
      top: 100%;
      left: 0;
      right: 0;
      height: 15vh;
      background: linear-gradient(canvas, transparent);
    }

    .section__content svg:nth-of-type(2) {
      translate: 0 2%;
    }

    .section__content svg:nth-of-type(2) path {
      stroke-dashoffset: 0;
      stroke-dasharray: 1.025;
      --dest: -1.025;
      -webkit-animation: draw both ease-out;
              animation: draw both ease-out;
      animation-timeline: view();
      animation-range: exit -25% exit 50%;
    }

    @-webkit-keyframes draw {
      to {
        stroke-dashoffset: var(--dest, 1.025);
      }
    }

    @keyframes draw {
      to {
        stroke-dashoffset: var(--dest, 1.025);
      }
    }

    footer {
      view-timeline: --footer;
    }

    footer h2 {
      -webkit-animation: reveal both linear;
              animation: reveal both linear;
      animation-timeline: --footer;
      animation-range: entry 75% entry 100%;
      position: fixed;
    }

    @-webkit-keyframes reveal {
      0% {
        filter: blur(10px);
        opacity: 0;
      }
    }

    @keyframes reveal {
      0% {
        filter: blur(10px);
        opacity: 0;
      }
    }
  }
}

@layer debug {
  [data-blend='false'] .section__content {
    mix-blend-mode: normal;
  }
  [data-debug='true'] .section__content::before {
    content: '';
    position: absolute;
    inset: 0;
    border: 10px dashed hotpink;
  }
  [data-debug='true'] .section__content svg {
    outline: 10px dashed hotpink;
  }
}

@layer demo {
  :root {
    --bg: black;
  }

  header {
    height: 100vh;
    display: grid;
    place-items: center;
    background: linear-gradient(transparent 50%, canvas);
  }

  section {
    position: relative;
  }

  .section__content {
    background: white;
    mix-blend-mode: lighten;
    z-index: 2;
  }

  .section__text {
    background: var(--bg);
    height: 100vh;
    display: grid;
    place-items: center;
  }

  .section__stick {
    position: absolute;
    inset: 0;
    top: 0;
    /* height: 100vh; */
    place-items: center;
    z-index: -1;
  }

  .section__content svg {
    overflow: visible !important;
  }

  .section__text p {
    margin: 0;
    --font-level: 5;
    color: white;
    /* background: black; */
    display: flex;
    flex-direction: column;
    gap: 2lh;
    font-weight: 600;
    align-items: center;
    justify-content: center;
    text-wrap: balance;
    text-align: center;
  }

  footer {
    height: 100vh;
    display: grid;
    align-content: end;
    position: relative;
  }

  footer h2 {
    --font-level: 5;
    text-transform: none;
    opacity: 1;
    position: absolute;
    top: 50%;
    left: 50%;
    translate: -50% -50%;
    z-index: -2;
  }

  video {
    position: sticky;
    top: 0;
    -o-object-fit: cover;
       object-fit: cover;
    width: 100%;
    height: 100vh;
    filter: brightness(0.65);
  }

  footer {
    padding: 2rem;
    text-align: center;
  }

  header {
    align-content: center;
  }

  h1 {
    --font-level: 7;
    position: relative;
    margin: 0;
  }

  h1 span {
    position: absolute;
    bottom: 100%;
    left: 50%;
    display: inline-block;
    translate: -50% 50%;
    font-size: 0.2em;
    text-transform: uppercase;
    white-space: nowrap;
    color: hsl(6 100% 50%);
  }

  h2 {
    --font-level: 1;
    margin: 0;
    opacity: 0.5;
    text-transform: uppercase;
  }
}

@layer base {
  :root {
    --font-size-min: 16;
    --font-size-max: 20;
    --font-ratio-min: 1.2;
    --font-ratio-max: 1.33;
    --font-width-min: 320;
    --font-width-max: 1500;
  }

  :where(.fluid) {
    --fluid-min: calc(
      var(--font-size-min) * pow(var(--font-ratio-min), var(--font-level, 0))
    );
    --fluid-max: .........完整代码请登录后点击上方下载按钮下载查看