iotlcm/admin-ui/vue/apps/web-antd/loading.html

<style>
  html {
    /* same as ant-design-vue/dist/reset.css setting, avoid the title line-height changed */
    line-height: 1.15;
  }

  .loading {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: #f4f7f9;
    transition: background-color 0.4s ease;

    /* transition: all 0.8s ease-out; */
  }

  .loading.hidden {
    pointer-events: none;
    visibility: hidden;
    opacity: 0;
    transition: all 0.8s ease-out;
  }

  .dark .loading {
    background: #0d0d10;
  }

  .title {
    margin-top: 66px;
    font-size: 28px;
    font-weight: 600;
    color: rgb(0 0 0 / 85%);
  }

  .dark .title {
    color: #fff;
  }

  .loader {
    position: relative;
    width: 48px;
    height: 48px;
    margin-bottom: 32px;
  }

  .loader::before {
    position: absolute;
    top: 60px;
    left: 0;
    width: 48px;
    height: 5px;
    content: '';
    background: hsl(var(--primary, 210 100% 50%) / 50%);
    border-radius: 50%;
    animation: shadow-ani 0.5s linear infinite;
  }

  .loader::after {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    content: '';
    background: hsl(var(--primary, 210 100% 50%));
    border-radius: 4px;
    animation: jump-ani 0.5s linear infinite;
  }

  .title-wrap {
    position: relative;
    min-width: 420px;
    min-height: 88px;
    text-align: center;
  }

  .title,
  .status-text,
  .status-subtitle {
    position: absolute;
    left: 50%;
    width: 100%;
    transform: translateX(-50%);
    transition:
      opacity 0.45s ease,
      transform 0.45s ease;
  }

  .title {
    top: 0;
    margin-top: 0;
    font-size: 28px;
    font-weight: 600;
    line-height: 1.35;
    color: rgb(0 0 0 / 85%);
    opacity: 0;
    transform: translateX(-50%) translateY(10px);
  }

  .status-text {
    top: 0;
    font-size: 28px;
    font-weight: 600;
    line-height: 1.35;
    color: rgb(0 0 0 / 85%);
    opacity: 1;
  }

  .status-subtitle {
    top: 48px;
    font-size: 13px;
    letter-spacing: 0.08em;
    color: rgb(100 116 139 / 88%);
  }

  .title-wrap.is-switching .status-text,
  .title-wrap.is-switching .status-subtitle {
    opacity: 0;
    transform: translateX(-50%) translateY(8px);
  }

  .loading.app-title-ready .status-text,
  .loading.app-title-ready .status-subtitle {
    opacity: 0;
    transform: translateX(-50%) translateY(-10px);
  }

  .loading.app-title-ready .title {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }

  .dark .status-text {
    color: #fff;
  }

  .dark .status-subtitle {
    color: rgb(148 163 184 / 78%);
  }

  @keyframes jump-ani {
    15% {
      border-bottom-right-radius: 3px;
    }

    25% {
      transform: translateY(9px) rotate(22.5deg);
    }

    50% {
      border-bottom-right-radius: 40px;
      transform: translateY(18px) scale(1, 0.9) rotate(45deg);
    }

    75% {
      transform: translateY(9px) rotate(67.5deg);
    }

    100% {
      transform: translateY(0) rotate(90deg);
    }
  }

  @keyframes shadow-ani {
    0%,
    100% {
      transform: scale(1, 1);
    }

    50% {
      transform: scale(1.2, 1);
    }
  }
</style>
<div class="loading" id="__app-loading__">
  <div class="loader" aria-hidden="true"></div>
  <div class="title-wrap">
    <div class="status-text" id="__app-loading-status__">正在初始化应用...</div>
    <div class="status-subtitle" id="__app-loading-subtitle__">
      请稍候，系统正在准备运行环境
    </div>
    <div class="title" id="__app-loading-title__">智联·云</div>
  </div>
</div>
<script data-app-loading="runtime-title">
  (function () {
    var loadingElement = document.getElementById('__app-loading__');
    var statusElement = document.getElementById('__app-loading-status__');
    var subtitleElement = document.getElementById('__app-loading-subtitle__');
    var titleElement = document.getElementById('__app-loading-title__');
    var titleWrapElement = titleElement && titleElement.parentElement;
    var messageTimer = null;
    var messageIndex = 0;

    var messages = [
      {
        status: '正在初始化应用...',
        subtitle: '请稍候，系统正在准备运行环境',
      },
      {
        status: '正在连接配置中心...',
        subtitle: '正在读取启动所需的运行时配置',
      },
      {
        status: '正在装载页面资源...',
        subtitle: '首次加载可能略慢，请稍候片刻',
      },
      {
        status: '正在校准界面状态...',
        subtitle: '即将进入系统首页',
      },
    ];

    if (
      !loadingElement ||
      !statusElement ||
      !subtitleElement ||
      !titleElement ||
      !titleWrapElement
    ) {
      return;
    }

    function applyMessage(message) {
      statusElement.textContent = message.status;
      subtitleElement.textContent = message.subtitle;
    }

    function switchMessage(message) {
      titleWrapElement.classList.add('is-switching');
      window.setTimeout(function () {
        applyMessage(message);
        titleWrapElement.classList.remove('is-switching');
      }, 220);
    }

    function startMessageLoop() {
      statusElement.style.opacity = '';
      subtitleElement.style.opacity = '';
      applyMessage(messages[0]);
      messageTimer = window.setInterval(function () {
        messageIndex = (messageIndex + 1) % messages.length;
        switchMessage(messages[messageIndex]);
      }, 1800);
    }

    function stopMessageLoop() {
      if (messageTimer !== null) {
        window.clearInterval(messageTimer);
        messageTimer = null;
      }
    }

    function applyTitle(setting) {
      var appTitle = setting && setting.appTitle;

      if (appTitle) {
        stopMessageLoop();
        titleElement.textContent = appTitle;
        loadingElement.classList.add('app-title-ready');
      }
    }

    // 配置已就绪，直接展示标题
    if (window.__APP_SETTING__) {
      applyTitle(window.__APP_SETTING__);
      return;
    }

    // 配置未就绪，直接展示默认加载文案
    startMessageLoop();

    // 等待配置返回后，若已启动文案轮播则停止，并展示标题
    if (window.__APP_SETTING_PROMISE__) {
      window.__APP_SETTING_PROMISE__
        .then(function (setting) {
          applyTitle(setting);
        })
        .catch(function () {});
    }
  })();
</script>