immer - npm Package Compare versions

Comparing version 7.0.12 to 7.0.13

package.json

 {
   "name": "immer",
-  "version": "7.0.12",
+  "version": "7.0.13",
   "description": "Create your next immutable state by mutating the current one",
@@ -5,0 +5,0 @@ "main": "dist/index.js",

src/core/proxy.ts

@@ -21,2 +21,3 @@ import {
 } from "../internal"
+import {isDraft} from "../utils/common"
 
@@ -133,3 +134,7 @@ interface ProxyBaseState extends ImmerBaseState {
 	},
-	set(state, prop: string /* strictly not, but helps TS */, value) {
+	set(
+		state: ProxyObjectState,
+		prop: string /* strictly not, but helps TS */,
+		value
+	) {
 		const desc = getDescriptorFromProto(latest(state), prop)
@@ -142,11 +147,15 @@ if (desc?.set) {
 		}
-		state.assigned_[prop] = true
 		if (!state.modified_) {
 			// the last check is because we need to be able to distinguish setting a non-existig to undefined (which is a change)
 			// from setting an existing property with value undefined to undefined (which is not a change)
-			if (
-				is(value, peek(latest(state), prop)) &&
-				(value !== undefined || has(state.base_, prop))
-			)
+			const current = peek(latest(state), prop)
+			// special case, if we assigning the original value to a draft, we can ignore the assignment
+			const currentState: ProxyObjectState = current?.[DRAFT_STATE]
+			if (currentState && currentState.base_ === value) {
+				state.copy_![prop] = value
+				state.assigned_[prop] = false
 				return true
+			}
+			if (is(value, current) && (value !== undefined || has(state.base_, prop)))
+				return true
 			prepareCopy(state)
@@ -157,2 +166,3 @@ markChanged(state)
 		state.copy_![prop] = value
+		state.assigned_[prop] = true
 		return true
@@ -159,0 +169,0 @@ },

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Maintenance

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Worsened metrics

Total package byte prevSize

90015

decreased by-89.04%

Number of package files

24

decreased by-65.22%

Lines of code

2596

decreased by-59.65%

Number of medium maintenance alerts

1

increased byInfinity%

No dependency changes