HarmonyOS 鸿蒙Next运行官网JSON Demo报错

是不是没有引用 import { JSON } from '[@kit](/user/kit).ArkTS';
参考以下demo实现

//Index.ets
import { JSON } from '[@kit](/user/kit).ArkTS';
import { reviverFunc } from './test';
[@Entry](/user/Entry)
[@Component](/user/Component)
struct Index {
 runDemo(): void {
   let jsonText = '{"name": "John", "age": 30, "city": "ChongQing"}';
   let obj = JSON.parse(jsonText);
   console.info((obj as object)?.["name"]);
   // 打印结果：John
   const jsonTextStr = '{"name": "John", "age": 30}';
   let objRst = JSON.parse(jsonTextStr, reviverFunc);
   console.info((objRst as object)?.["age"]);
   // 打印结果：31
   let options: JSON.ParseOptions = {
     bigIntMode: JSON.BigIntMode.PARSE_AS_BIGINT,
   }
   let numberText = '{"largeNumber":112233445566778899}';
   let numberObj = JSON.parse(numberText,(key: string, value: Object | undefined | null): Object | undefined | null => {
     if(key === "largeNumber") return value;
     return value;
   },options) as Object;
   console.info((numberObj as object)?.["largeNumber"]);
   // 打印结果: 112233445566778899 
 }
 build() {
   Button('运行demo').onClick((event: ClickEvent) => {
     this.runDemo()
   })
 }
}