angular设置全局变量 可修改监听变量

创建service.module.ts

import { NgModule, ModuleWithProviders } from @angular/core;import { SomeSharedService } from ./global.service;export {SomeSharedService}@NgModule()export class ServicesModule { static forRoot():ModuleWithProviders{return {ngModule:ServicesModule,providers:[SomeSharedService]}}}

新建global.service.ts

import { Injectable } from @angular/coreimport { BehaviorSubject } from xjs;@Injectable()export class SomeSharedService {public globalVar:BehaviorSubject<any[]> = new BehaviorSubject([]);public pageLimit = 10;}

在header组件中引入服务并获取值

...import { SomeSharedService } from src/app/services/global.service;.....constructor(private someSharedService: So