HarmonyOS 华为浏览器是否会支持rem的自适应方案

HarmonyOS
fox280
2024-12-23 16:38:56
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参考：
<!DOCTYPE html>
  <html lang="en">
  <head>
  <meta charset="utf-8">
  <title>FengHuang</title>
  <meta name="viewport" content="initial-scale=1,maximum-scale=1,minimum-scale=1,user-scalable=no,width=device-width,viewport-fit=cover">
  <style>
  body, html {
  max-width: 100%;
}
html {
  background-color: #FFFFFF;
  padding: 0;
}
body {
  background-color: #CCCCCC;
  margin: 0;
  padding: 0;
}
#info {
  width: 100%;
  box-sizing: border-box;
  padding: 20px 10px;
  background-color: #999999;
  color: #FFFFFF;
  font-size: 12px;
  line-height: 1.5;
  text-align: center;
}
html,body {margin: 0 auto;}
#blocks {
  color: #ffffff;
  line-height: 1rem;
  vertical-align: middle;
  text-align: center;
}
.full-block {
  width: 10rem;
  height: 1rem;
  background-color: blue;
  font-size: 0.5rem;
  margin-bottom: 2px;
  white-space: nowrap;
}
.half-block {
  width: 5rem;
  height: 1rem;
  background-color: green;
  font-size: 0.25rem;
  margin-bottom: 2px;
  white-space: nowrap;
}
</style>
  </head>
  <body>
  <div id="info"></div>
  <div id="blocks">
  <div class="full-block">W:10rem, H: 1rem, F: 0.5rem</div>
  <div class="full-block" style="font-size: 18.75px;">W:10rem, H: 1rem, F: 18.75px</div>
  <div class="half-block">W:5rem, H: 1rem, F: 0.25rem</div>
  <div class="half-block" style="font-size: 9.375px;">W:5rem, H: 1rem, F: 9.375px</div>
  </div>
  </body>
  <script>
  function showWidthInfo() {
    const infoDom = document.getElementById('info');
    const htmlStr = `
            window.devicePixelRatio: ${window.devicePixelRatio}<br/>
            visualViewport.scale: ${visualViewport.scale}<br/>
            document.documentElement.clientWidth: ${document.documentElement.clientWidth}<br/>
            document.documentElement.offsetWidth: ${document.documentElement.offsetWidth}<br/>
            document.documentElement.scrollWidth: ${document.documentElement.scrollWidth}<br/>
            window.outerWidth: ${window.outerWidth}<br/>
            window.innerWidth: ${window.innerWidth}<br/>
            window.screen.width: ${window.screen.width}<br/>
            document.documentElement.clientHeight: ${document.documentElement.clientHeight}<br/>
            document.documentElement.offsetHeight: ${document.documentElement.offsetHeight}<br/>
            document.documentElement.scrollHeight: ${document.documentElement.scrollHeight}<br/>
            document.documentElement.style.fontSize: ${document.documentElement.style.fontSize}<br/>
        `;
    infoDom.innerHTML = htmlStr;
  }

function rem() {
  function resize() {
    var width = window.innerWidth;
    var rem = width / 10;
    document.documentElement.style.fontSize = rem + 'px';
    showWidthInfo()
  }
  resize()
  window.addEventListener('resize', resize)
}

document.addEventListener('DOMContentLoaded', function () {
  showWidthInfo();
  rem();
})
  </script>
  </html>
  <!DOCTYPE html>
  <html lang="en">
  <head>
  <meta charset="utf-8">
  <title>FengHuang</title>
  <meta name="viewport" content="initial-scale=1,maximum-scale=1,minimum-scale=1,user-scalable=no,width=device-width,viewport-fit=cover">
  <style>
  body, html {
  max-width: 100%;
}
html {
  background-color: #FFFFFF;
  padding: 0;
}
body {
  background-color: #CCCCCC;
  margin: 0;
  padding: 0;
}
#info {
  width: 100%;
  box-sizing: border-box;
  padding: 20px 10px;
  background-color: #999999;
  color: #FFFFFF;
  font-size: 12px;
  line-height: 1.5;
  text-align: center;
}
html,body {margin: 0 auto;}
#blocks {
  color: #ffffff;
  line-height: 1rem;
  vertical-align: middle;
  text-align: center;
}
.full-block {
  width: 10rem;
  height: 1rem;
  background-color: blue;
  font-size: 0.5rem;
  margin-bottom: 2px;
  white-space: nowrap;
}
.half-block {
  width: 5rem;
  height: 1rem;
  background-color: green;
  font-size: 0.25rem;
  margin-bottom: 2px;
  white-space: nowrap;
}
</style>
  </head>
  <body>
  <div id="info"></div>
  <div id="blocks">
  <div class="full-block">W:10rem, H: 1rem, F: 0.5rem</div>
  <div class="full-block" style="font-size: 18.75px;">W:10rem, H: 1rem, F: 18.75px</div>
  <div class="half-block">W:5rem, H: 1rem, F: 0.25rem</div>
  <div class="half-block" style="font-size: 9.375px;">W:5rem, H: 1rem, F: 9.375px</div>
  </div>
  </body>
  <script>
  function showWidthInfo() {
    const infoDom = document.getElementById('info');
    const htmlStr = `
            window.devicePixelRatio: ${window.devicePixelRatio}<br/>
            visualViewport.scale: ${visualViewport.scale}<br/>
            document.documentElement.clientWidth: ${document.documentElement.clientWidth}<br/>
            document.documentElement.offsetWidth: ${document.documentElement.offsetWidth}<br/>
            document.documentElement.scrollWidth: ${document.documentElement.scrollWidth}<br/>
            window.outerWidth: ${window.outerWidth}<br/>
            window.innerWidth: ${window.innerWidth}<br/>
            window.screen.width: ${window.screen.width}<br/>
            document.documentElement.clientHeight: ${document.documentElement.clientHeight}<br/>
            document.documentElement.offsetHeight: ${document.documentElement.offsetHeight}<br/>
            document.documentElement.scrollHeight: ${document.documentElement.scrollHeight}<br/>
            document.documentElement.style.fontSize: ${document.documentElement.style.fontSize}<br/>
        `;
    infoDom.innerHTML = htmlStr;
  }

function rem() {
  function resize() {
    var width = window.innerWidth;
    var rem = width / 10;
    document.documentElement.style.fontSize = rem + 'px';
    showWidthInfo()
  }
  resize()
  window.addEventListener('resize', resize)
}

document.addEventListener('DOMContentLoaded', function () {
  showWidthInfo();
  rem();
})
  </script>
  </html>
2024-12-23 19:02:04
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