iPhone SE 产品网页之 A13 晶片动画特效

html部分

<section id="chip-section">
  <video src="https://www.apple.com/105/media/us/iphone-se/2020/90024c0f-285a-4bf5-af04-2c38de97b06e/anim/arcade-loop/large.mp4" muted playsinline autoplay loop></video>
  <h1>
    iPhone 11 Pro called.<br>
    It wants its chip back.
  </h1>
  <div id="the-chip">
    <svg viewBox="0 0 1000 1000" id="A13">
      <rect class="text-bg" x="78" y="307" width="843" height="387"></rect>
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      <path d="M894.279877,0 C952.083613,0 999.052244,46.3905942 999.985837,103.971847 L1000,105.720123 L1000,894.279877 C1000,952.083613 953.609406,999.052244 896.028153,999.985837 L894.279877,1000 L105.720123,1000 C47.9163872,1000 0.947755733,953.609406 0.0141634759,896.028153 L0,894.279877 L0,105.720123 C0,47.9163872 46.3905942,0.947755733 103.971847,0.0141634759 L105.720123,0 L894.279877,0 Z M892.997819,31 L105.002181,31 C64.5406078,31 31.6634119,63.4725801 31.0099142,103.77842 L31,105.002181 L31,892.997819 C31,933.459392 63.4725801,966.336588 103.77842,966.990086 L105.002181,967 L892.997819,967 C933.459392,967 966.336588,934.52742 966.990086,894.22158 L967,892.997819 L967,105.002181 C967,64.5406078 934.52742,31.6634119 894.22158,31.0099142 L892.997819,31 Z" class="chip"></path>
    </svg>
  </div>
</section>

css部分

body {
  background-color: #000;
  margin: 0;
  height: 3000px;
}

#A13 .chip {
  fill: #fff;
}

#A13 .text-bg {
  fill: #fff;
}

#A13 .chip-mask {
  fill: #000;
}

#chip-section {
  position: sticky;
  top: 0;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

video {
  height: 100vh;
  width: auto;
  position: relative;
  left: 50%;
  transform: translate(-50%, 0);
}

#the-chip {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100px;
  height: 100px;
  box-shadow: 0px 0px 0px 100vw black, 0px 0px 0px 30px black inset;
  z-index: 10;
  min-width: 100px;
  min-height: 100px;
  background-color: #000;
}

#the-chip.transparent {
  background-color: transparent;
}

#A13 {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0;
}

h1 {
  position: absolute;
  top: 0;
  left: 0;
  color: #fff;
  z-index: 20;
  font-family: Helvetica;
  font-size: 64px;
  letter-spacing: -1px;
  text-align: center;
  width: 100%;
  top: 50%;
  transform: translate(0, -50%);
  margin: 0;
}

js部分

window.addEventListener('scroll', (e) => {
  let scrolled = document.documentElement.scrollTop / (document.documentElement.scrollHeight - document.documentElement.clientHeight)
  
  let $h1 = document.querySelector('h1')
  let $theChip = document.querySelector('#the-chip')
  let $A13 = document.querySelector('#A13')
  let $A13TextBg = document.querySelector('#the-chip .text-bg')
  
  $theChip.style.width = $theChip.style.height = document.documentElement.clientWidth * 20 * (scrolled * scrolled * scrolled) + 'px'
  
  if (scrolled <= 0.1) {
    $h1.style.opacity = (0.1 - scrolled) / 0.1
    $h1.style.marginTop = scrolled * 1000 * -1 + 'px'
  } else {
    $h1.style.opacity = 0
  }
  
  if (scrolled <= 0.2) {
    $A13.style.opacity = (scrolled - 0.1) / 0.1
  } else {
    $A13.style.opacity = 1
  }
  
  if (scrolled >= 0.5) {
    $A13TextBg.style.opacity = (1 - scrolled) / 0.5
    $theChip.classList.add('transparent')
  } else {
    $A13TextBg.style.opacity = 1
    $theChip.classList.remove('transparent')
  }
  
  if (scrolled >= 0.95) {
    $theChip.style.opacity = (1 - scrolled) / 0.05
  } else {
    $theChip.style.opacity = 1
  }
  
})

有空使用vuejs来实现效果，放在代码后面