RxJS中的“ event =＆gt”有什么作用？

Question

我在下面遇到了这段代码，但是我不明白为什么我们要做的事件等于并且大于console.log，如果有人解释了，我将非常感谢

const node = document.querySelector('input[type=text]');

const input$ = Rx.Observable.fromEvent(node, 'input');

input$.subscribe({

  next: event => console.log(`You just typed ${event.target.value}!`),

  error: err => console.log(`Oops... ${err}`),

  complete: () => console.log(`Complete!`),

});

const input$ = Rx.Observable.fromEvent(node, 'input')

  .map(event => event.target.value)

  .filter(value => value.length >= 2)

  .subscribe(value => {

    // use the `value`

  });

Answer 1

这看起来像是通过HTML清理器传递的Javascript代码。使用箭头功能的原始代码应如下所示：const node = document.querySelector('input[type=text]');const input$ = Rx.Observable.fromEvent(node, 'input');input$.subscribe({  next: event => console.log(`You just typed ${event.target.value}!`),  error: err => console.log(`Oops... ${err}`),  complete: () => console.log(`Complete!`),});const input$ = Rx.Observable.fromEvent(node, 'input')  .map(event => event.target.value)  .filter(value => value.length >= 2)  .subscribe(value => {    // use the `value`  });