windowToggle
- 签名: windowToggle(openings: Observable, closingSelector: function(value): Observable): Observable
以 openings 发出为起始，以 closingSelector 发出为结束，收集并发出源 observable 中的值的 observable 。
- 示例
  - 示例 1: 根据渐增的定时器开关窗口
其他资源

windowToggle

签名: `windowToggle(openings: Observable, closingSelector: function(value): Observable): Observable`

以 openings 发出为起始，以 closingSelector 发出为结束，收集并发出源 observable 中的值的 observable 。

示例

示例 1: 根据渐增的定时器开关窗口

( StackBlitz |
jsBin |
jsFiddle )

import { interval } from 'rxjs/observable/interval';
import { timer } from 'rxjs/observable/timer';
import { tap, windowToggle, mergeAll } from 'rxjs/operators';
// 立即发出值，然后每秒发出值
const source = timer(0, 1000);
// 每5秒开关窗口
const toggle = interval(5000);
const example = source.pipe(
  // 每5秒开启窗口
  windowToggle(toggle, val => interval(val * 1000)),
  tap(_ => console.log('NEW WINDOW!'))
);
const subscribeTwo = example
  .pipe(
    // 窗口发出嵌套的 observable
    mergeAll()
    /*
      输出:
      "NEW WINDOW!"
      5
      "NEW WINDOW!"
      10
      11
      "NEW WINDOW!"
      15
      16
      "NEW WINDOW!"
      20
      21
      22
    */
  )
  .subscribe(val => console.log(val));