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feat: allow signal effect to clean itself up inside callback function #5

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feat: allow signal effect to clean itself up inside callback function #5

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13 changes: 10 additions & 3 deletions signals.js
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Original file line number Diff line number Diff line change
Expand Up @@ -13,9 +13,16 @@ export class Signal extends EventTarget {
}

effect(fn) {
fn();
this.addEventListener('change', fn);
return () => this.removeEventListener('change', fn);
const controller = new AbortController()
const cleanup = () => controller.abort()

fn(cleanup)
this.addEventListener(
'change',
() => fn(cleanup), { signal: controller.signal }
)

return cleanup
}

valueOf () { return this.#value; }
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