Question

bufferToggle

函数签名: bufferToggle(openings: Observable, closingSelector: Function): Observable

开启开关以捕获源 observable 所发出的值，关闭开关以将缓冲的值作为数组发出。

示例

示例 1: 使用 interval 来切换缓冲的开关

( StackBlitz | jsBin | jsFiddle )

// RxJS v6+
import { interval } from 'rxjs';
import { bufferToggle } from 'rxjs/operators';

// 每1秒发出值
const sourceInterval = interval(1000);
// 5秒后开启第一个缓冲区，然后每5秒钟开启新的缓冲区
const startInterval = interval(5000);
// 3秒后发出值以关闭相应的缓冲区
const closingInterval = val => {
  console.log(`Value ${val} emitted, starting buffer! Closing in 3s!`);
  return interval(3000);
};
// 每5秒会开启一个新的缓冲区以收集发出的值，3秒后发出缓冲的值
const bufferToggleInterval = sourceInterval.pipe(
  bufferToggle(
    startInterval,
    closingInterval
  )
);
// 输出到控制台
// 输出: Emitted Buffer: [4,5,6]...[9,10,11]
const subscribe = bufferToggleInterval.subscribe(val =>
  console.log('Emitted Buffer:', val)
);

其他资源

• bufferToggle :newspaper: - 官方文档

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源码: https://github.com/ReactiveX/rxjs/blob/master/src/internal/operators/bufferToggle.ts