ui: 优化资源加载

packages/ui-default/entry.js

@@ -1,5 +1,6 @@
 window.Hydro = {
   extraPages: [],
+  preload: [],
   components: {},
   utils: {},
   node_modules: {},
@@ -19,9 +20,28 @@ console.log(
 `,
 );
 
-window.UiContext = JSON.parse(window.UiContext);
+document.addEventListener('DOMContentLoaded', () => {
+  window.UiContext = JSON.parse(window.UiContext);
 
-// eslint-disable-next-line
-try { __webpack_public_path__ = UiContext.cdn_prefix } catch (e) { }
+  // eslint-disable-next-line
+  try { __webpack_public_path__ = UiContext.cdn_prefix } catch (e) { }
 
-import('./hydro');
+  // Locale & langs
+  const { version, payload } = JSON.parse(localStorage.getItem('hydro-constant') || '{}');
+  if (version === UiContext.constantVersion) {
+    eval(payload[0]); // eslint-disable-line no-eval
+    payload.shift();
+    window.Hydro.preload = payload;
+    import('./hydro');
+  } else {
+    fetch(`/constant?version=${UiContext.constantVersion}`)
+      .then((res) => res.json())
+      .then((data) => {
+        eval(data.payload[0]); // eslint-disable-line no-eval
+        localStorage.setItem('hydro-constant', JSON.stringify(data));
+        data.payload.shift();
+        window.Hydro.preload = data.payload;
+        import('./hydro');
+      });
+  }
+}, false);