Method #traverse

packages/svelte/src/internal/client/reactivity/batch.js:434–477

* Traverse the effect tree, executing effects or stashing * them for later execution as appropriate * @param {Effect} root * @param {Effect[]} effects * @param {Effect[]} render_effects

(root, effects, render_effects)

	 * @param {Effect[]} render_effects
	 */
	#traverse(root, effects, render_effects) {
		root.f ^= CLEAN;

		var effect = root.first;

		while (effect !== null) {
			var flags = effect.f;
			var is_branch = (flags & (BRANCH_EFFECT | ROOT_EFFECT)) !== 0;
			var is_skippable_branch = is_branch && (flags & CLEAN) !== 0;

			var skip = is_skippable_branch || (flags & INERT) !== 0 || this.#skipped_branches.has(effect);

			if (!skip && effect.fn !== null) {
				if (is_branch) {
					effect.f ^= CLEAN;
				} else if ((flags & EFFECT) !== 0) {
					effects.push(effect);
				} else if (async_mode_flag && (flags & (RENDER_EFFECT | MANAGED_EFFECT)) !== 0) {
					render_effects.push(effect);
				} else if (is_dirty(effect)) {
					if ((flags & BLOCK_EFFECT) !== 0) this.#maybe_dirty_effects.add(effect);
					update_effect(effect);
				}

				var child = effect.first;

				if (child !== null) {
					effect = child;
					continue;
				}
			}

			while (effect !== null) {
				var next = effect.next;

				if (next !== null) {
					effect = next;
					break;
				}

				effect = effect.parent;
			}
		}
	}

	#find_earlier_batch() {
		var batch = this.#prev;