createSignalNode

// ---------- reactive cells ---------- /** Creates the storage of a signal: its value, its equality and the observers that read it.

// ---------- reactive cells ----------

/** Creates the storage of a signal: its value, its equality and the observers that read it. Read it with readSignal and write it with writeSignal; useSignal is built this way.

Import#

import { createSignalNode } from "@shadow-js/core/extend";

Signature#

function createSignalNode<T>(value: T, equals: Equals<T>, name?: string): Signal<T>

Parameters#

Name	Description
`value`	Initial value.
`equals`	Decides whether a write is a change: readers are notified only when it returns `false`. `false` notifies on every write.
`name`	Label shown by devtools. Undefined leaves the signal unnamed.

Returns#

The signal node. It has no owner: it lives as long as something references it.

Examples#

import { createSignalNode, readSignal, writeSignal } from "@shadow-js/core/extend";

const temperature = createSignalNode<number>(20, Object.is, "temperature");
const read = () => readSignal(temperature);
writeSignal(temperature, 21);
console.log(read()); // 21