Function effect

src/index.ts:165–189

(fn: () => void | (() => void))

}

export function effect(fn: () => void | (() => void)): () => void {
	const e: EffectNode = {
		fn,
		cleanup: undefined,
		subs: undefined,
		subsTail: undefined,
		deps: undefined,
		depsTail: undefined,
		flags: ReactiveFlags.Watching | ReactiveFlags.RecursedCheck,
	};
	const prevSub = setActiveSub(e);
	if (prevSub !== undefined) {
		link(e, prevSub, 0);
		prevSub.flags |= HasChildEffect;
	}
	try {
		++runDepth;
		e.cleanup = e.fn();
	} finally {
		--runDepth;
		activeSub = prevSub;
		e.flags &= ~ReactiveFlags.RecursedCheck;
	}
	return effectOper.bind(e);
}

export function effectScope(fn: () => void): () => void {
	const e: EffectScopeNode = {