[Build] revert site to webpack config (#3747)

docs/site/router.js

@@ -0,0 +1,86 @@
+import Vue from 'vue';
+import docConfig from './doc.config';
+import DemoList from './components/DemoList';
+import DemoPages from './components/DemoPages';
+import { demoWrapper } from './mobile/demo-common';
+import { initIframeRouter } from './utils/iframe-router';
+
+initIframeRouter();
+
+const registerRoute = ({ mobile, componentMap }) => {
+  const route = [
+    {
+      path: '*',
+      redirect: () => `/${Vue.prototype.$vantLang}/`
+    }
+  ];
+
+  Object.keys(docConfig).forEach(lang => {
+    if (mobile) {
+      route.push({
+        path: `/${lang}`,
+        component: DemoList,
+        meta: { lang }
+      });
+    } else {
+      route.push({
+        path: `/${lang}`,
+        redirect: `/${lang}/intro`
+      });
+    }
+
+    function addRoute(page, lang) {
+      let { path } = page;
+      if (path) {
+        path = path.replace('/', '');
+
+        let component;
+        if (path === 'demo') {
+          component = DemoPages;
+        } else if (mobile) {
+          const module = componentMap[`./${path}/demo/index.vue`];
+          if (module) {
+            component = demoWrapper(module, path);
+          }
+        } else {
+          const module =
+            componentMap[`./${path}/README.${lang}.md`] ||
+            componentMap[`./${path}/README.md`] ||
+            componentMap[`./${path}.${lang}.md`];
+
+          component = module.default;
+        }
+
+        if (!component) {
+          return;
+        }
+
+        route.push({
+          name: lang + '/' + path,
+          component,
+          path: `/${lang}/${path}`,
+          meta: {
+            lang,
+            path,
+            name: page.title
+          }
+        });
+      }
+    }
+
+    const navs = docConfig[lang].nav || [];
+    navs.forEach(nav => {
+      if (nav.groups) {
+        nav.groups.forEach(group => {
+          group.list.forEach(page => addRoute(page, lang));
+        });
+      } else {
+        addRoute(nav, lang);
+      }
+    });
+  });
+
+  return route;
+};
+
+export default registerRoute;