JustHTML/Tools/ColorContrastChecker.html at main · X-starRelight/JustHTML · GitHub

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<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>颜色对比度检测 - JustHTML 只需网页</title>
  <script>
/**
 * 动态加载（强制去除缓存） CSS 的函数
 * @param {string} src - 要加载的 CSS 的 src 链接
 * @returns {Promise} 返回一个 Promise 对象，用于处理异步加载
 */
function loadStyle(src) {
  return new Promise((resolve, reject) => {
    const link = document.createElement('link');
    link.rel = 'stylesheet';
    link.href = src + '?v=' + new Date().getTime(); // 使用时间戳避免缓存
    link.async = true;
    link.onload = resolve;
    link.onerror = reject;
    document.head.appendChild(link);
  });
}

/**
 * 动态加载（强制去除缓存） JS 的函数
 * @param {string} src - 要加载的 JS 的 src 链接
 * @returns {Promise} 返回一个 Promise 对象，用于处理异步加载
 */
function loadScript(src) {
  return new Promise((resolve, reject) => {
    const script = document.createElement('script');
    script.src = src + '?v=' + new Date().getTime(); // 使用时间戳避免缓存
    script.async = true;
    script.onload = resolve;
    script.onerror = reject;
    document.head.appendChild(script);
  });
}
</script>

  <script>
    loadStyle('../assets/style.css')
    let scriptArray = [
      "../assets/AddHeader_Tools.js",
      "../assets/AddFooter.js",
      "../assets/AddIco.js",
      "../assets/AutoRun.js",
    ]

    scriptArray.forEach(script => {
      loadScript(script);
    });
  </script>

  <script src="../package/Vue/code/vue.global.prod.js"></script>
  <script type="module" src="../package/Sober/code/main.js"></script>

  <style>
    .checker-container {
      max-width: 800px;
      margin: 0 auto;
    }

    .color-inputs {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      margin: 20px 0;
    }

    .color-input-group {
      flex: 1;
      min-width: 250px;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .color-preview {
      width: 150px;
      height: 100px;
      border-radius: var(--border-radius);
      border: 1px solid var(--bg-tertiary);
      margin: 10px 0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: white;
      text-shadow: 1px 1px 2px rgba(0,0,0,0.7);
    }

    .contrast-ratio {
      font-size: 2em;
      text-align: center;
      margin: 20px 0;
      padding: 15px;
      background-color: var(--bg-secondary);
      border-radius: var(--border-radius);
      min-height: 80px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .ratio-value {
      color: var(--accent-color);
      font-weight: bold;
    }

    .wcag-levels {
      display: flex;
      justify-content: space-around;
      margin: 20px 0;
      flex-wrap: wrap;
    }

    .level-item {
      text-align: center;
      padding: 10px;
      border-radius: var(--border-radius);
      background-color: var(--bg-secondary);
      min-width: 100px;
      margin: 5px;
    }

    .level-pass {
      background-color: rgba(74, 194, 131, 0.2);
      border: 1px solid #4ade80;
    }

    .level-fail {
      background-color: rgba(239, 68, 68, 0.2);
      border: 1px solid #f87171;
    }

    .guidelines {
      margin: 20px 0;
      padding: 15px;
      background-color: var(--bg-secondary);
      border-radius: var(--border-radius);
    }

    .sample-texts {
      margin: 20px 0;
    }

    .sample-text {
      padding: 15px;
      border-radius: var(--border-radius);
      margin: 10px 0;
      font-size: 1.2em;
    }

    .controls {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin: 15px 0;
      justify-content: center;
    }

    .info-box {
      background-color: var(--bg-tertiary);
      padding: 10px;
      border-radius: var(--border-radius);
      margin: 10px 0;
    }
  </style>
</head>
<body>
  <div id="app">
    <div class="container">
      <a href="../index.html" class="back-link">← 返回首页</a>

      <div class="tool-section">
        <h2>颜色对比度检测</h2>
        <p>检查两种颜色之间的对比度是否符合无障碍标准</p>

        <div class="info-box">
          <p><strong>WCAG对比度标准：</strong></p>
          <p>• AA级标准：正常文本≥4.5:1，大文本≥3:1</p>
          <p>• AAA级标准：正常文本≥7:1，大文本≥4.5:1</p>
        </div>

        <div class="checker-container">
          <div class="color-inputs">
            <div class="color-input-group">
              <label for="foregroundColor">前景色 (文字色)</label>
              <input
                type="color"
                id="foregroundColor"
                v-model="foregroundColor"
                @input="calculateContrast"
              >
              <div
                class="color-preview"
                :style="{ backgroundColor: foregroundColor }"
              >
                {{ foregroundColor.toUpperCase() }}
              </div>
              <input
                type="text"
                v-model="foregroundColor"
                @input="validateColor('foreground')"
              >
            </div>

            <div class="color-input-group">
              <label for="backgroundColor">背景色</label>
              <input
                type="color"
                id="backgroundColor"
                v-model="backgroundColor"
                @input="calculateContrast"
              >
              <div
                class="color-preview"
                :style="{ backgroundColor: backgroundColor }"
              >
                {{ backgroundColor.toUpperCase() }}
              </div>
              <input
                type="text"
                v-model="backgroundColor"
                @input="validateColor('background')"
              >
            </div>
          </div>

          <div class="controls">
            <button @click="swapColors">交换颜色</button>
            <button @click="randomColors">随机颜色</button>
            <button @click="resetColors">重置颜色</button>
          </div>

          <div class="contrast-ratio">
            <div>对比度比例</div>
            <div class="ratio-value">{{ contrastRatio.toFixed(2) }}:1</div>
          </div>

          <div class="wcag-levels">
            <div class="level-item" :class="normalTextAA ? 'level-pass' : 'level-fail'">
              <div>AA级 (普通)</div>
              <div>{{ normalTextAA ? '通过' : '不通过' }}</div>
            </div>

            <div class="level-item" :class="largeTextAA ? 'level-pass' : 'level-fail'">
              <div>AA级 (大字)</div>
              <div>{{ largeTextAA ? '通过' : '不通过' }}</div>
            </div>

            <div class="level-item" :class="normalTextAAA ? 'level-pass' : 'level-fail'">
              <div>AAA级 (普通)</div>
              <div>{{ normalTextAAA ? '通过' : '不通过' }}</div>
            </div>

            <div class="level-item" :class="largeTextAAA ? 'level-pass' : 'level-fail'">
              <div>AAA级 (大字)</div>
              <div>{{ largeTextAAA ? '通过' : '不通过' }}</div>
            </div>
          </div>

          <div class="guidelines">
            <h3>对比度指南</h3>
            <ul>
              <li><strong>低对比度：</strong>小于3:1 - 不推荐用于正文</li>
              <li><strong>最小对比度：</strong>3:1 - 用于大文本</li>
              <li><strong>增强对比度：</strong>4.5:1 - 用于普通文本或低视力用户</li>
              <li><strong>高级对比度：</strong>7:1 - 用于更佳可读性</li>
            </ul>
          </div>

          <div class="sample-texts">
            <h3>示例文本</h3>
            <div
              class="sample-text"
              :style="{ backgroundColor: backgroundColor, color: foregroundColor }"
            >
              这是一段示例文本，用于预览所选颜色的可读性效果。这段文字可以帮助您直观地感受颜色搭配的实际效果。
            </div>
            <div
              class="sample-text"
              :style="{ backgroundColor: backgroundColor, color: foregroundColor, fontSize: '1.5em' }"
            >
              这是大号字体的示例文本，字号更大，更容易阅读。
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>

  <script>
    const { createApp, ref, computed } = Vue;

    createApp({
      setup() {
        const foregroundColor = ref('#000000');
        const backgroundColor = ref('#FFFFFF');

        // 计算相对亮度
        const getRelativeLuminance = (color) => {
          // 将十六进制颜色转换为RGB
          const r = parseInt(color.substr(1, 2), 16) / 255;
          const g = parseInt(color.substr(3, 2), 16) / 255;
          const b = parseInt(color.substr(5, 2), 16) / 255;

          // 转换为相对亮度
          const rs = r <= 0.03928 ? r / 12.92 : Math.pow((r + 0.055) / 1.055, 2.4);
          const gs = g <= 0.03928 ? g / 12.92 : Math.pow((g + 0.055) / 1.055, 2.4);
          const bs = b <= 0.03928 ? b / 12.92 : Math.pow((b + 0.055) / 1.055, 2.4);

          return 0.2126 * rs + 0.7152 * gs + 0.0722 * bs;
        };

        // 计算对比度比率
        const calculateContrast = () => {
          const lum1 = getRelativeLuminance(foregroundColor.value);
          const lum2 = getRelativeLuminance(backgroundColor.value);

          // 确保较亮的颜色在分子位置
          const brightest = Math.max(lum1, lum2);
          const darkest = Math.min(lum1, lum2);

          return (brightest + 0.05) / (darkest + 0.05);
        };

        // 计算对比度比率
        const contrastRatio = computed(() => {
          return calculateContrast();
        });

        // 检查是否符合各种WCAG标准
        const normalTextAA = computed(() => {
          return contrastRatio.value >= 4.5;
        });

        const largeTextAA = computed(() => {
          return contrastRatio.value >= 3.0;
        });

        const normalTextAAA = computed(() => {
          return contrastRatio.value >= 7.0;
        });

        const largeTextAAA = computed(() => {
          return contrastRatio.value >= 4.5;
        });

        // 交换颜色
        const swapColors = () => {
          const temp = foregroundColor.value;
          foregroundColor.value = backgroundColor.value;
          backgroundColor.value = temp;
        };

        // 随机颜色
        const randomColors = () => {
          foregroundColor.value = '#' + Math.floor(Math.random()*16777215).toString(16).padStart(6, '0');
          backgroundColor.value = '#' + Math.floor(Math.random()*16777215).toString(16).padStart(6, '0');
        };

        // 重置颜色
        const resetColors = () => {
          foregroundColor.value = '#000000';
          backgroundColor.value = '#FFFFFF';
        };

        // 验证颜色输入
        const validateColor = (type) => {
          const color = type === 'foreground' ? foregroundColor.value : backgroundColor.value;
          // 确保颜色值是有效的十六进制格式
          if (!/^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$/.test(color)) {
            // 如果格式不正确，保持之前的值
            return;
          }
        };

        return {
          foregroundColor,
          backgroundColor,
          contrastRatio,
          normalTextAA,
          largeTextAA,
          normalTextAAA,
          largeTextAAA,
          swapColors,
          randomColors,
          resetColors,
          validateColor
        };
      }
    }).mount('#app');
  </script>
</body>
</html>