move effect.ran into the bitmask

Author: Rich-Harris

packages/svelte/src/internal/client/constants.js

@@ -10,6 +10,7 @@ export const MAYBE_DIRTY = 1 << 10;
 export const INERT = 1 << 11;
 export const DESTROYED = 1 << 12;
 export const IS_ELSEIF = 1 << 13;
+export const EFFECT_RAN = 1 << 14;
 
 export const UNINITIALIZED = Symbol();
 export const STATE_SYMBOL = Symbol('$state');

packages/svelte/src/internal/client/dom/elements/transitions.js

@@ -7,6 +7,7 @@ import { run_transitions } from '../../render.js';
 import { is_function } from '../../utils.js';
 import { current_each_item_block } from '../blocks/each.js';
 import { TRANSITION_GLOBAL, TRANSITION_IN, TRANSITION_OUT } from '../../../../constants.js';
+import { EFFECT_RAN } from '../../constants.js';
 
 /**
  * @template T
@@ -207,14 +208,14 @@ export function transition(flags, element, get_fn, get_params) {
 	// if this is a local transition, we only want to run it if the parent (block) effect's
 	// parent (branch) effect is where the state change happened. we can determine that by
 	// looking at whether the branch effect is currently initializing
-	if (
-		is_intro &&
-		run_transitions &&
-		(is_global || /** @type {import('#client').Effect} */ (effect.parent).ran)
-	) {
-		user_effect(() => {
-			untrack(() => transition.in());
-		});
+	if (is_intro && run_transitions) {
+		var parent = /** @type {import('#client').Effect} */ (effect.parent);
+
+		if (is_global || (parent.f & EFFECT_RAN) !== 0) {
+			user_effect(() => {
+				untrack(() => transition.in());
+			});
+		}
 	}
 }
 

packages/svelte/src/internal/client/reactivity/effects.js

@@ -48,8 +48,7 @@ function create_effect(type, fn, sync, block = current_block, init = true) {
 		teardown: null,
 		ctx: current_component_context,
 		ondestroy: null,
-		transitions: null,
-		ran: false
+		transitions: null
 	};
 
 	if (current_effect !== null) {

packages/svelte/src/internal/client/reactivity/types.d.ts

@@ -49,10 +49,8 @@ export interface Effect extends Reaction {
 	teardown: null | (() => void);
 	/** The depth from the root signal, used for ordering render/pre-effects topologically **/
 	l: number;
-
-	// transitions TODO
+	/** Transition managers created with `$.transition` */
 	transitions: null | TransitionManager[];
-	ran: boolean; // TODO fold this into the bitmask
 }
 
 export interface ValueDebug<V = unknown> extends Value<V> {

packages/svelte/src/internal/client/runtime.js

@@ -21,7 +21,8 @@ import {
 	DESTROYED,
 	INERT,
 	MANAGED,
-	STATE_SYMBOL
+	STATE_SYMBOL,
+	EFFECT_RAN
 } from './constants.js';
 import { flush_tasks } from './dom/task.js';
 import { add_owner } from './dev/ownership.js';
@@ -551,7 +552,7 @@ export function schedule_effect(signal, sync) {
 		}
 	}
 
-	signal.ran = true;
+	signal.f |= EFFECT_RAN;
 }
 
 /**