chore：更换到主分支

src/utils/loaders/index.ts

@@ -0,0 +1,62 @@
+/*
+ * @Author: your name
+ * @Date: 2021-02-02 15:12:44
+ * @LastEditTime: 2021-02-02 15:17:37
+ * @LastEditors: Please set LastEditors
+ * @Description: In User Settings Edit
+ * @FilePath: \CURD-TS-self\src\utils\loaders\index.ts
+ */
+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 => {
+    let 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 {
+      let 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: number = 0
+        srcList.map(src => {
+          if (src) {
+            this.loadScript(src).then(() => {
+              count++
+              if (count === len) {
+                return
+              }
+            })
+          }
+        })
+      }
+    }
+  }
+
+}
+
+export const loader = new loaderProxy()