depends_on_old_values() — svelte Function Reference

Architecture documentation for the depends_on_old_values() function in runtime.js from the svelte codebase.

Function javascript ClientRuntime Hydration called by 1

Entity Profile

ClientRuntime→ Hydration→ depends_on_old_values() — svelte Function Reference

Dependency Diagram

graph TD
  44f1a3e5_a277_7ed0_ece5_a7d65d767ba0["depends_on_old_values()"]
  bde4209f_8ffc_1594_4024_b1835a44bcf6["runtime.js"]
  44f1a3e5_a277_7ed0_ece5_a7d65d767ba0 -->|defined in| bde4209f_8ffc_1594_4024_b1835a44bcf6
  a08b6cc5_af73_1be4_d02f_3113cf8a8305["get()"]
  a08b6cc5_af73_1be4_d02f_3113cf8a8305 -->|calls| 44f1a3e5_a277_7ed0_ece5_a7d65d767ba0
  style 44f1a3e5_a277_7ed0_ece5_a7d65d767ba0 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/svelte/src/internal/client/runtime.js lines 694–709

function depends_on_old_values(derived) {
	if (derived.v === UNINITIALIZED) return true; // we don't know, so assume the worst
	if (derived.deps === null) return false;

	for (const dep of derived.deps) {
		if (old_values.has(dep)) {
			return true;
		}

		if ((dep.f & DERIVED) !== 0 && depends_on_old_values(/** @type {Derived} */ (dep))) {
			return true;
		}
	}

	return false;
}