【单例对象】

// 构造一个单例对象
export class GlobalContext{
    private constructor(){}
    private static instance:GlobalContext
    private _objects = new Map<string, Object>()

    public static getContext():GlobalContext{
        if(!GlobalContext.instance){
            GlobalContext.instance = new GlobalContext
        }
        return GlobalContext.instance
    }

    getObject(value:string): Object | undefined{
        return this._objects.get(value)
    }

    setObject(key:string, objectClass:Object):void{
        this._objects.set(key, objectClass)
    }
}

// 使用方法
// file1.ts

import { GlobalContext } from '../GlobalContext'

export class Test {
  value: string = '';
  foo(): void {
    GlobalContext.getContext().setObject('value', this.value);
  }
}

// file2.ts

import { GlobalContext } from '../GlobalContext'

GlobalContext.getContext().getObject('value');