feedback

Author: trueadm

packages/svelte/src/internal/client/dev/tracing.js

@@ -42,17 +42,12 @@ function log_entry(signal, entry) {
 
 	const type = (signal.f & DERIVED) !== 0 ? '$derived' : '$state';
 	const current_reaction = /** @type {Reaction} */ (active_reaction);
-	const status =
-		signal.w_version > current_reaction.w_version || current_reaction.w_version === 0
-			? 'dirty'
-			: 'clean';
+	const dirty = signal.wv > current_reaction.wv || current_reaction.wv === 0;
 
 	// eslint-disable-next-line no-console
 	console.groupCollapsed(
 		`%c${type}`,
-		status !== 'clean'
-			? 'color: CornflowerBlue; font-weight: bold'
-			: 'color: grey; font-weight: bold',
+		!dirty ? 'color: CornflowerBlue; font-weight: bold' : 'color: grey; font-weight: bold',
 		typeof value === 'object' && value !== null && STATE_SYMBOL in value
 			? snapshot(value, true)
 			: value

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

@@ -57,10 +57,10 @@ export function derived(fn) {
 		equals,
 		f: flags,
 		fn,
-		r_version: 0,
 		reactions: null,
+		rv: 0,
 		v: /** @type {V} */ (null),
-		w_version: 0,
+		wv: 0,
 		parent: parent_derived ?? active_effect
 	};
 
@@ -183,7 +183,7 @@ export function update_derived(derived) {
 
 	if (!derived.equals(value)) {
 		derived.v = value;
-		derived.w_version = increment_write_version();
+		derived.wv = increment_write_version();
 	}
 }
 

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

@@ -110,7 +110,7 @@ function create_effect(type, fn, sync, push = true) {
 		prev: null,
 		teardown: null,
 		transitions: null,
-		w_version: 0
+		wv: 0
 	};
 
 	if (DEV) {

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

@@ -57,8 +57,8 @@ export function source(v, stack) {
 		v,
 		reactions: null,
 		equals,
-		r_version: 0,
-		w_version: 0
+		rv: 0,
+		wv: 0
 	};
 
 	if (DEV && tracing_mode_flag) {
@@ -170,7 +170,7 @@ export function internal_set(source, value) {
 	if (!source.equals(value)) {
 		var old_value = source.v;
 		source.v = value;
-		source.w_version = increment_write_version();
+		source.wv = increment_write_version();
 
 		if (DEV && tracing_mode_flag) {
 			source.updated = get_stack('UpdatedAt');

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

@@ -4,20 +4,20 @@ export interface Signal {
 	/** Flags bitmask */
 	f: number;
 	/** Write version */
-	w_version: number;
+	wv: number;
 }
 
 export interface Value<V = unknown> extends Signal {
-	created?: Error | null;
 	/** Equality function */
 	equals: Equals;
 	/** Signals that read from this signal */
 	reactions: null | Reaction[];
 	/** Read version */
-	r_version: number;
+	rv: number;
 	/** The latest value for this signal */
 	v: V;
 	/** Dev only */
+	created?: Error | null;
 	updated?: Error | null;
 	trace_need_increase?: boolean;
 	trace_v?: V;
@@ -38,8 +38,6 @@ export interface Derived<V = unknown> extends Value<V>, Reaction {
 	fn: () => V;
 	/** Reactions created inside this signal */
 	children: null | Reaction[];
-	/** Read version */
-	r_version: number;
 	/** Parent effect or derived */
 	parent: Effect | Derived | null;
 }

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

@@ -127,8 +127,13 @@ export function set_untracked_writes(value) {
 	untracked_writes = value;
 }
 
-/** @type {number} Used by sources and deriveds for handling updates to unowned deriveds it starts from 1 to differentiate between a created effect and a run one for tracing */
+/**
+ * @type {number} Used by sources and deriveds for handling updates.
+ * Version starts from 1 so that unowned deriveds differentiate between a created effect and a run one for tracing
+ **/
 let write_version = 1;
+
+/** @type {number} Used to version each read of a source of derived to avoid duplicating depedencies inside a reaction */
 let read_version = 0;
 
 // If we are working with a get() chain that has no active container,
@@ -227,7 +232,7 @@ export function check_dirtiness(reaction) {
 					update_derived(/** @type {Derived} */ (dependency));
 				}
 
-				if (dependency.w_version > reaction.w_version) {
+				if (dependency.wv > reaction.wv) {
 					return true;
 				}
 			}
@@ -530,7 +535,7 @@ export function update_effect(effect) {
 		execute_effect_teardown(effect);
 		var teardown = update_reaction(effect);
 		effect.teardown = typeof teardown === 'function' ? teardown : null;
-		effect.w_version = write_version;
+		effect.wv = write_version;
 
 		var deps = effect.deps;
 
@@ -542,7 +547,7 @@ export function update_effect(effect) {
 			for (let i = 0; i < deps.length; i++) {
 				var dep = deps[i];
 				if (dep.trace_need_increase) {
-					dep.w_version = increment_write_version();
+					dep.wv = increment_write_version();
 					dep.trace_need_increase = undefined;
 					dep.trace_v = undefined;
 				}
@@ -882,8 +887,8 @@ export function get(signal) {
 			e.state_unsafe_local_read();
 		}
 		var deps = active_reaction.deps;
-		if (signal.r_version < read_version) {
-			signal.r_version = read_version;
+		if (signal.rv < read_version) {
+			signal.rv = read_version;
 			// If the signal is accessing the same dependencies in the same
 			// order as it did last time, increment `skipped_deps`
 			// rather than updating `new_deps`, which creates GC cost