关于如何使用rxjs

import { interval } from 'rxjs';

// Create an Observable that will publish a value on an interval
const secondsCounter = interval(1000);
// Subscribe to begin publishing values
secondsCounter.subscribe(n =>
  console.log(`It's been ${n} seconds since subscribing!`));

如上所示， 首先引入rxjs，其次定义一个 一秒的循环 函数， 然后调用该函数，并输出该时间