免费工具 Consent Mode v2 代码生成器：gtag 和 GTM 两种写法

<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  // Consent Mode v2 默认值：必须在任何 config、event 命令之前执行
  gtag('consent', 'default', {
    'ad_storage': 'denied',
    'ad_user_data': 'denied',
    'ad_personalization': 'denied',
    'analytics_storage': 'denied',
    'functionality_storage': 'denied',
    'personalization_storage': 'denied',
    'security_storage': 'granted',
    'wait_for_update': 500,
    'region': ['AT', 'BE', 'BG', 'HR', 'CY', 'CZ', 'DK', 'EE', 'FI', 'FR', 'DE', 'GR', 'HU', 'IE', 'IT', 'LV', 'LT', 'LU', 'MT', 'NL', 'PL', 'PT', 'RO', 'SK', 'SI', 'ES', 'SE', 'IS', 'LI', 'NO', 'GB', 'CH']
  });
  gtag('consent', 'default', {
    'ad_storage': 'granted',
    'ad_user_data': 'granted',
    'ad_personalization': 'granted',
    'analytics_storage': 'granted',
    'functionality_storage': 'granted',
    'personalization_storage': 'granted',
    'security_storage': 'granted'
  });
  gtag('set', 'ads_data_redaction', true);
  // 回访访客：恢复 Cookie 弹窗保存的选择
  (function () {
    var raw = null, r = null;
    try { raw = localStorage.getItem('cookie_consent'); } catch (e) {}
    if (!raw) try { var m = document.cookie.match(/(?:^|; )cookie_consent=([^;]*)/); if (m) raw = decodeURIComponent(m[1]); } catch (e) {}
    try { r = JSON.parse(raw); } catch (e) {}
    if (!r || !r.c || !(r.e > Date.now())) return;
    var c = r.c;
    gtag('consent', 'update', {
      'ad_storage': c.marketing ? 'granted' : 'denied',
      'ad_user_data': c.marketing ? 'granted' : 'denied',
      'ad_personalization': c.marketing ? 'granted' : 'denied',
      'analytics_storage': c.analytics ? 'granted' : 'denied',
      'functionality_storage': c.preferences ? 'granted' : 'denied',
      'personalization_storage': c.preferences ? 'granted' : 'denied'
    });
  })();
</script>
<!-- Google tag (gtag.js) -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-XXXXXXXXXX"></script>
<script>
  gtag('js', new Date());
  gtag('config', 'G-XXXXXXXXXX');
</script>

<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  // 访客做出或修改选择时调用 applyConsent()
  window.applyConsent = function (c) {
    gtag('consent', 'update', {
      'ad_storage': c.marketing ? 'granted' : 'denied',
      'ad_user_data': c.marketing ? 'granted' : 'denied',
      'ad_personalization': c.marketing ? 'granted' : 'denied',
      'analytics_storage': c.analytics ? 'granted' : 'denied',
      'functionality_storage': c.preferences ? 'granted' : 'denied',
      'personalization_storage': c.preferences ? 'granted' : 'denied'
    });
  };
  // 示例：
  // applyConsent({ analytics: true, marketing: false, preferences: false });
</script>