add gtag

assets/gtag.ts

@@ -0,0 +1,25 @@
+Reflect.set(self, "dataLayer", Reflect.get(self, "dataLayer") || []);
+
+gtag("js", new Date());
+gtag("config", "G-HRBGCQKEY6");
+loadScript("https://www.googletagmanager.com/gtag/js?id=G-HRBGCQKEY6");
+
+export function gtag(name: "js", value: Date): void;
+export function gtag(name: "config", value: string): void;
+export function gtag(name: "event", action: string, params: object): void;
+export function gtag(): void {
+  Reflect.get(self, "dataLayer").push(arguments);
+}
+
+function loadScript(url: string) {
+  return new Promise<void>((resolve, reject) => {
+    const element = document.createElement("script");
+    element.src = url;
+    element.addEventListener("load", () => {
+      resolve();
+      element.remove();
+    });
+    element.addEventListener("error", reject);
+    document.head.appendChild(element);
+  });
+}

layouts/partials/docs/inject/content-after.html

@@ -2,5 +2,11 @@
   <hr>
   <p>本文仅供学习所用，严禁转载或商业加工，任何需求请联系译者 (<a href="mailto:nao@sakuras.jp">佐倉 奈緒</a>）</p>
 </article>
-{{ $customize_js := resources.Get "customize.js" | js.Build | resources.Minify | resources.Fingerprint "sha512" }}
-<script src="{{ $customize_js.Permalink }}" integrity="{{ $customize_js.Data.Integrity }}"></script>
+{{- with resources.Get "customize.js" | js.Build | minify | fingerprint }}
+<script src="{{ .Permalink }}" integrity="{{ .Data.Integrity }}"></script>
+{{- end }}
+{{- if hugo.IsProduction }}
+{{- with resources.Get "gtag.ts" | js.Build | minify | fingerprint }}
+<script src="{{ .Permalink }}" integrity="{{ .Data.Integrity }}"></script>
+{{- end }}
+{{- end }}