{{define "trackerInit"}}
{{/* PC：defer 正常加载；H5：延后注入 SDK，降低首屏带宽与主线程争抢 */}}
<script>
  window.__TRACKER_BOOT__ = {
    appId: "{{InTrackerAppId}}",
    encryptedConfig: {{jsonStr .appConfig.ReportSDKConfig}},
    appVersion: "1.0.0",
    pageKey: "{{.pageKey}}",
    pageName: "{{.pageName}}"
  };
  window.__IS_H5__ = !!(window.matchMedia && window.matchMedia("(max-width: 767px)").matches);
</script>
{{/* PC 保留原 defer；H5 不在此拉取，由下方脚本空闲时注入 */}}
<script>
(function () {
  if (window.__IS_H5__) return;
  var s1 = document.createElement("script");
  s1.defer = true;
  s1.src = "/static/common/web-sdk-v1.1.8.js?v=1";
  document.head.appendChild(s1);
  var s2 = document.createElement("script");
  s2.defer = true;
  s2.src = "/static/js/tracker.js?v=3";
  document.head.appendChild(s2);
})();
</script>
<script>
  (function () {
    var isH5 = !!window.__IS_H5__;
    var sdkSrc = "/static/common/web-sdk-v1.1.8.js?v=1";
    var trackerSrc = "/static/js/tracker.js?v=3";

    function getQueryParam(name) {
      try {
        var s = window.location.search || "";
        var m = new RegExp("[?&]" + name + "=([^&#]*)").exec(s);
        return m ? decodeURIComponent(m[1].replace(/\+/g, " ")) : "";
      } catch (e) { return ""; }
    }
    function getCookie(name) {
      try {
        var match = document.cookie.match(new RegExp("(?:^|; )" + name + "=([^;]*)"));
        return match ? decodeURIComponent(match[1]) : "";
      } catch (e) { return ""; }
    }
    // 渠道采用首次归因：dc、ch、pc 按落地页项目的顺序识别，已有渠道不覆盖。
    function getStoredChannel() {
      try {
        var storedChannel = window.localStorage.getItem("channel");
        storedChannel = storedChannel ? String(storedChannel).trim() : "";
        if (storedChannel) return storedChannel;

        var channel = getQueryParam("dc") || getQueryParam("ch") || getQueryParam("pc") || "";
        channel = String(channel).trim();
        if (channel) window.localStorage.setItem("channel", channel);
        return channel;
      } catch (e) {
        // localStorage 被禁用时仍使用当前 URL 的渠道码完成本次上报。
        return String(getQueryParam("dc") || getQueryParam("ch") || getQueryParam("pc") || "").trim();
      }
    }
    // H5 埋点脚本会延迟加载，先同步落盘，避免用户快速跳转时丢失首次渠道。
    var trackerChannel = getStoredChannel();
    function loadScript(src) {
      return new Promise(function (resolve, reject) {
        var existing = document.querySelector('script[src="' + src + '"]');
        if (existing) {
          if (existing.getAttribute("data-loaded") === "1" || typeof window.trackerInit === "function") {
            resolve();
            return;
          }
          existing.addEventListener("load", function () { resolve(); });
          existing.addEventListener("error", reject);
          return;
        }
        var s = document.createElement("script");
        s.src = src;
        s.async = true;
        s.onload = function () {
          s.setAttribute("data-loaded", "1");
          resolve();
        };
        s.onerror = reject;
        document.head.appendChild(s);
      });
    }
    function bootTracker() {
      if (typeof window.trackerInit !== "function" || !window.__TRACKER_BOOT__) return;
      var uid = getQueryParam("uid") || getCookie("uid") || getCookie("userId") || "";
      var cfg = window.__TRACKER_BOOT__;
      window.trackerInit({
        appId: cfg.appId,
        uid: uid,
        channel: trackerChannel,
        encryptedConfig: cfg.encryptedConfig,
        appVersion: cfg.appVersion,
        pageKey: cfg.pageKey,
        pageName: cfg.pageName,
      });
    }
    function whenTrackerReady(cb) {
      if (typeof window.trackerInit === "function") {
        cb();
        return;
      }
      var n = 0;
      var t = setInterval(function () {
        n += 1;
        if (typeof window.trackerInit === "function" || n > 40) {
          clearInterval(t);
          cb();
        }
      }, 100);
    }
    function bootAnalytics() {
      var run = function () {
        bootTracker();
      };
      if (isH5) {
        loadScript(sdkSrc)
          .then(function () { return loadScript(trackerSrc); })
          .then(run)
          .catch(function () {});
        return;
      }
      whenTrackerReady(run);
    }
    function scheduleBoot() {
      if (isH5) {
        if ("requestIdleCallback" in window) {
          requestIdleCallback(bootAnalytics, { timeout: 4000 });
        } else {
          setTimeout(bootAnalytics, 2500);
        }
        return;
      }
      if (document.readyState === "loading") {
        document.addEventListener("DOMContentLoaded", bootAnalytics);
      } else {
        bootAnalytics();
      }
    }
    scheduleBoot();
  })();
</script>
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{{end}}