d() — svelte Function Reference

Source Code

packages/svelte/src/internal/client/dom/blocks/boundary.js lines 307–350

	#update_pending_count(d) {
		if (!this.has_pending_snippet()) {
			if (this.parent) {
				this.parent.#update_pending_count(d);
			}

			// if there's no parent, we're in a scope with no pending snippet
			return;
		}

		this.#pending_count += d;

		if (this.#pending_count === 0) {
			this.is_pending = false;

			// any effects that were encountered and deferred during traversal
			// should be rescheduled — after the next traversal (which will happen
			// immediately, due to the same update that brought us here)
			// the effects will be flushed
			for (const e of this.#dirty_effects) {
				set_signal_status(e, DIRTY);
				schedule_effect(e);
			}

			for (const e of this.#maybe_dirty_effects) {
				set_signal_status(e, MAYBE_DIRTY);
				schedule_effect(e);
			}

			this.#dirty_effects.clear();
			this.#maybe_dirty_effects.clear();

			if (this.#pending_effect) {
				pause_effect(this.#pending_effect, () => {
					this.#pending_effect = null;
				});
			}

			if (this.#offscreen_fragment) {
				this.#anchor.before(this.#offscreen_fragment);
				this.#offscreen_fragment = null;
			}
		}
	}