feat: add pure-admin-thin

src/utils/loaders/index.ts

@@ -0,0 +1,54 @@
+interface ProxyLoader {
+  loadCss(src: string): any;
+  loadScript(src: string): Promise<any>;
+  loadScriptConcurrent(src: Array<string>): Promise<any>;
+}
+
+class loaderProxy implements ProxyLoader {
+  constructor() {}
+
+  protected scriptLoaderCache: Array<string> = [];
+
+  public loadCss = (src: string): any => {
+    const element: HTMLLinkElement = document.createElement("link");
+    element.rel = "stylesheet";
+    element.href = src;
+    document.body.appendChild(element);
+  };
+
+  public loadScript = async (src: string): Promise<any> => {
+    if (this.scriptLoaderCache.includes(src)) {
+      return src;
+    } else {
+      const element: HTMLScriptElement = document.createElement("script");
+      element.src = src;
+      document.body.appendChild(element);
+      element.onload = () => {
+        return this.scriptLoaderCache.push(src);
+      };
+    }
+  };
+
+  public loadScriptConcurrent = async (
+    srcList: Array<string>
+  ): Promise<any> => {
+    if (Array.isArray(srcList)) {
+      const len: number = srcList.length;
+      if (len > 0) {
+        let count = 0;
+        srcList.map(src => {
+          if (src) {
+            this.loadScript(src).then(() => {
+              count++;
+              if (count === len) {
+                return;
+              }
+            });
+          }
+        });
+      }
+    }
+  };
+}
+
+export const loader = new loaderProxy();