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javascript - 使用混合混合模式的暗模式：差异不起作用

问题描述

好的，所以我一直在尝试在我的网站上实现暗模式功能。我制作了一个出现在页面右下角的小部件。我将整个网站包含在一个名为 test 的 div 中。单击小部件后，它会切换并将类添加dark-mode-screen到testdiv。

但是，只有文本和小部件的颜色会发生变化，而背景保持不变。

CSS


        .box {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            border: 1px solid #333;
            padding: 10px 20px;
            font-family: sans-serif;
            mix-blend-mode: normal;
            transition: mix-blend-mode 0.7s ease-in;
        }

        .dark-button {
            position: absolute;
            right: 20px;
            bottom: 20px;
            border-radius: 50px;
            height: 60px;
            width: 60px;
            border: 1px solid steelblue;
            background: steelblue;
            outline: none;
        }

        .dark-mode-screen {
          width: 100vw;
          height: 100%;
          position: fixed;
          top: 0;
          left: 0;
          background: white;
          overflow-y: scroll;
        }

        .test {
            background: #fff;
            transition: all 0.7s ease-in;
        }

HTML：


    <div class="test">
    <div class="container" style="background: #fff; mix-blend-mode: difference;">

        <div class="box">
            <h3>My Paragraph</h3>
            <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
            tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
            quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
            consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
            cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
            proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
        </div>

        <button class="dark-button"></button>

    </div>
    </div>

JavaScript：

        const darkModeToggle = document.querySelector('.dark-button');
        darkModeToggle.onclick = function() {
            document.querySelector('.test').classList.toggle('dark-mode-screen');
        }

标签： javascripthtmlcssthemesfrontend

解决方案

您可以将background-colorCSS 属性设置为白色mix-blend-mode，但没有提供任何要减去的内容：

.box {
  ...
  background-color: white;
}


const darkModeToggle = document.querySelector('.dark-button');
darkModeToggle.onclick = function() {
  document.querySelector('.test').classList.toggle('dark-mode-screen');
}
.box {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border: 1px solid #333;
  padding: 10px 20px;
  font-family: sans-serif;
  mix-blend-mode: normal;
  transition: mix-blend-mode 0.7s ease-in;
  background-color: white;
}

.dark-button {
  position: absolute;
  right: 20px;
  bottom: 20px;
  border-radius: 50px;
  height: 60px;
  width: 60px;
  border: 1px solid steelblue;
  background: steelblue;
  outline: none;
}

.dark-mode-screen {
  width: 100vw;
  height: 100%;
  position: fixed;
  top: 0;
  left: 0;
  background: white;
  overflow-y: scroll;
}

.test {
  background: #fff;
  transition: all 0.7s ease-in;
}
<div class="test">
  <div class="container" style="background: #fff; mix-blend-mode: difference;">
    <div class="box">
      <h3>My Paragraph</h3>
      <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
        dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
    </div>
    <button class="dark-button"></button>
  </div>
</div>

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