(Angular 7)防止某些模块(授权)被预渲染，并保持默认的角度行为

import { TransferState, makeStateKey } from '@angular/platform-browser';

const AUTH_STATE_KEY = makeStateKey<boolean>('authState');

export class AuthModule {
  constructor(private transferState: TransferState) {}

  // 授权成功后调用此方法
  private setAuthState(authState: boolean): void {
    this.transferState.set(AUTH_STATE_KEY, authState);
  }
}

import { TransferState, makeStateKey } from '@angular/platform-browser';

const AUTH_STATE_KEY = makeStateKey<boolean>('authState');

export class AppModule {
  constructor(private transferState: TransferState) {
    const authState = this.transferState.get(AUTH_STATE_KEY, null);
    if (authState !== null) {
      // 将授权状态传递给授权模块
    }
  }
}