eewing
32 lines
749 B
JavaScript
32 lines
749 B
JavaScript
export class SharedState {
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#factory;
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#subscribers = 0;
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#state = $state();
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#scope;
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constructor(factory) {
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this.#factory = factory;
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}
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#dispose() {
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this.#subscribers -= 1;
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if (this.#scope && this.#subscribers <= 0) {
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this.#scope();
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this.#state = undefined;
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this.#scope = undefined;
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}
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}
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get(...args) {
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this.#subscribers += 1;
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if (this.#state === undefined) {
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this.#scope = $effect.root(() => {
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this.#state = this.#factory(...args);
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});
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}
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$effect(() => {
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return () => {
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this.#dispose();
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};
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});
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return this.#state;
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}
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}
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