Function destroy_effects

packages/svelte/src/internal/client/dom/blocks/each.js:135–162

* @param {EachState} state * @param {Effect[]} to_destroy * @param {boolean} remove_dom

(state, to_destroy, remove_dom = true)

 * @param {boolean} remove_dom
 */
function destroy_effects(state, to_destroy, remove_dom = true) {
	/** @type {Set<Effect> | undefined} */
	var preserved_effects;

	// The loop-in-a-loop isn't ideal, but we should only hit this in relatively rare cases
	if (state.pending.size > 0) {
		preserved_effects = new Set();

		for (const keys of state.pending.values()) {
			for (const key of keys) {
				preserved_effects.add(/** @type {EachItem} */ (state.items.get(key)).e);
			}
		}
	}

	for (var i = 0; i < to_destroy.length; i++) {
		var e = to_destroy[i];

		if (preserved_effects?.has(e)) {
			e.f |= EFFECT_OFFSCREEN;

			const fragment = document.createDocumentFragment();
			move_effect(e, fragment);
		} else {
			destroy_effect(to_destroy[i], remove_dom);
		}
	}
}

/** @type {TemplateNode} */
var offscreen_anchor;