progress

ui/src/core/extensions/array.ts

@@ -1,13 +1,3 @@
-export {};
-
-declare global {
-  interface Array<T> {
-    // @strict: The parameter is determined whether the arrays must be exactly the same in content and order of this relationship or simply follow the same requirements.
-    equals(array: Array<T>, strict: boolean): boolean;
-    lastElement(): T | undefined;
-  }
-}
-
 export const ArrayExtensions = () => {
   if ([].equals === undefined) {
     // eslint-disable-next-line no-extend-native
@@ -42,4 +32,10 @@ export const ArrayExtensions = () => {
       }
     };
   }
+  if ([].isEmpty === undefined) {
+    // eslint-disable-next-line no-extend-native
+    Array.prototype.isEmpty = function () {
+      return this.length === 0;
+    };
+  }
 };

ui/src/core/extensions/extensions.ts

@@ -1,6 +1,18 @@
 import { ArrayExtensions } from "./array";
+import { StringExtensions } from "./string";
 
-export const extensions = () =>{
-    ArrayExtensions()
+declare global {
+  interface Array<T> {
+    // @strict: The parameter is determined whether the arrays must be exactly the same in content and order of this relationship or simply follow the same requirements.
+    equals(array: Array<T>, strict: boolean): boolean;
+    lastElement(): T | undefined;
+    isEmpty(): boolean;
+  }
+  interface String {
+    isEmpty(): boolean;
+  }
 }
- 
+export const extensions = () => {
+  ArrayExtensions();
+  StringExtensions();
+};

ui/src/core/extensions/string.ts

@@ -0,0 +1,8 @@
+export const StringExtensions = () => {
+  if ("".isEmpty === undefined) {
+    // eslint-disable-next-line no-extend-native
+    String.prototype.isEmpty = function () {
+      return this.length === 0;
+    };
+  }
+};