Signal | /mod.ts | effection@3.0.3

interface Signal

import { type Signal } from "https://deno.land/x/effection@3.0.3/mod.ts";

Convert plain JavaScript function calls into a Stream that can be consumed within an operation. If no operation is subscribed to a signal's stream, then sending messages to it is a no-op.

Signals are particularly suited to be installed as event listeners.

Examples

Example 1

import { createSignal, each } from "effection";

export function* logClicks(function*(button) {
  let clicks = createSignal<MouseEvent>();

  button.addEventListener("click", clicks.send);

  try {
    for (let click of yield* each(clicks)) {
      console.log(`click:`, click);
      yield* each.next();
    }
  } finally {
    button.removeEventListener("click", clicks.send);
  }
})

Type Parameters

TClose

Methods

send(value: T): void

Send a value to all the consumers of this signal.

close(value: TClose): void

Send the final value of this signal to all its consumers.