From 8ff8cf51d51eacf17be23e1c7ed87f7612da4e57 Mon Sep 17 00:00:00 2001
From: baseballyama <xydybaseball@gmail.com>
Date: Mon, 17 Mar 2025 21:04:09 +0900
Subject: [PATCH 1/8] feat: add `ignorePropertyPatterns` property and rename
 `ignorePatterns` to `ignoreTypePatterns` in `no-unused-props` rule

---
 .changeset/crazy-peas-laugh.md                |  5 ++
 docs/rules/no-unused-props.md                 | 31 ++++++++--
 .../eslint-plugin-svelte/src/rule-types.ts    |  3 +-
 .../src/rules/no-unused-props.ts              | 56 +++++++++++++++++--
 ...gnore-property-patterns-custom-config.json |  7 +++
 ...gnore-property-patterns-custom-errors.yaml |  8 +++
 ...nore-property-patterns-custom-input.svelte |  9 +++
 .../ignored-pattern-partial-config.json       |  7 ---
 .../ignored-type-patterns-custom-config.json  |  7 +++
 ... ignored-type-patterns-custom-errors.yaml} |  0
 ...ignored-type-patterns-custom-input.svelte} |  0
 ...gnore-property-patterns-custom-config.json |  7 +++
 ...nore-property-patterns-custom-input.svelte |  8 +++
 ...ore-property-patterns-default-input.svelte | 13 +++++
 .../ignored-conditional-type-config.json      |  7 ---
 .../ignored-type-patterns-custom-config.json  |  7 +++
 ...ignored-type-patterns-custom-input.svelte} |  0
 .../ignored-type-patterns-custom2-config.json |  7 +++
 ...ignored-type-patterns-custom2-input.svelte | 12 ++++
 19 files changed, 170 insertions(+), 24 deletions(-)
 create mode 100644 .changeset/crazy-peas-laugh.md
 create mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignore-property-patterns-custom-config.json
 create mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignore-property-patterns-custom-errors.yaml
 create mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignore-property-patterns-custom-input.svelte
 delete mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignored-pattern-partial-config.json
 create mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignored-type-patterns-custom-config.json
 rename packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/{ignored-pattern-partial-errors.yaml => ignored-type-patterns-custom-errors.yaml} (100%)
 rename packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/{ignored-pattern-partial-input.svelte => ignored-type-patterns-custom-input.svelte} (100%)
 create mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-custom-config.json
 create mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-custom-input.svelte
 create mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-default-input.svelte
 delete mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-conditional-type-config.json
 create mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom-config.json
 rename packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/{ignored-conditional-type-input.svelte => ignored-type-patterns-custom-input.svelte} (100%)
 create mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom2-config.json
 create mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom2-input.svelte

diff --git a/.changeset/crazy-peas-laugh.md b/.changeset/crazy-peas-laugh.md
new file mode 100644
index 000000000..f46c78452
--- /dev/null
+++ b/.changeset/crazy-peas-laugh.md
@@ -0,0 +1,5 @@
+---
+'eslint-plugin-svelte': minor
+---
+
+feat: add `ignorePropertyPatterns` property and rename `ignorePatterns` to `ignoreTypePatterns` in `no-unused-props` rule. The `ignorePatterns` option existed only for a few days and is removed by this PR. Technically, this is a breaking change, but we’ll handle it as a minor release since very few users are likely affected.
diff --git a/docs/rules/no-unused-props.md b/docs/rules/no-unused-props.md
index c375aa430..714c945e4 100644
--- a/docs/rules/no-unused-props.md
+++ b/docs/rules/no-unused-props.md
@@ -159,14 +159,17 @@ Note: Properties of class types are not checked for usage, as they might be used
   "svelte/no-unused-props": ["error", {
     // Whether to check properties from imported types
     "checkImportedTypes": false,
+    // Patterns to ignore when checking property types
+    "ignoreTypePatterns": [],
     // Patterns to ignore when checking for unused props
-    "ignorePatterns": []
+    "ignorePropertyPatterns": ["/^[#$@_~]/"],
   }]
 }
 ```
 
 - `checkImportedTypes` ... Controls whether to check properties from imported types. Default is `false`.
-- `ignorePatterns` ... Patterns to ignore when checking for unused props. Default is an empty array.
+- `ignoreTypePatterns` ... Patterns to ignore when checking property types. Default is `[]`.
+- `ignorePropertyPatterns` ... Patterns to ignore when checking for unused props. Default is `/["^[#$@_~]"]/`, which ignores properties starting with special characters often used for internal or framework-specific identifiers.
 
 Examples:
 
@@ -187,10 +190,28 @@ Examples:
 ```svelte
 <!-- ✓ Good Examples -->
 <script lang="ts">
-  /* eslint svelte/no-unused-props: ["error", { "ignorePatterns": ["^_"] }] */
-  // Ignore properties starting with underscore
+  /* eslint svelte/no-unused-props: ["error", { "ignoreTypePatterns": ["/^Internal/"] }] */
+  // Ignore properties from types matching the pattern
+  interface InternalConfig {
+    secretKey: string;
+    debugMode: boolean;
+  }
+  interface Props {
+    config: InternalConfig; // Properties of InternalConfig won't be checked
+    value: number;
+  }
+  let { config, value }: Props = $props();
+  console.log(value, config);
+</script>
+```
+
+```svelte
+<!-- ✓ Good Examples -->
+<script lang="ts">
+  /* eslint svelte/no-unused-props: ["error", { "ignorePropertyPatterns": ["/^_/"] }] */
+  // Ignore properties with names matching the pattern
   interface Props {
-    _internal: string;
+    _internal: string; // This prop won't be reported even if unused
     value: number;
   }
   let { value }: Props = $props();
diff --git a/packages/eslint-plugin-svelte/src/rule-types.ts b/packages/eslint-plugin-svelte/src/rule-types.ts
index 86e6d65b8..19e30a345 100644
--- a/packages/eslint-plugin-svelte/src/rule-types.ts
+++ b/packages/eslint-plugin-svelte/src/rule-types.ts
@@ -535,7 +535,8 @@ type SvelteNoUnusedClassName = []|[{
 // ----- svelte/no-unused-props -----
 type SvelteNoUnusedProps = []|[{
   checkImportedTypes?: boolean
-  ignorePatterns?: string[]
+  ignoreTypePatterns?: string[]
+  ignorePropertyPatterns?: string[]
 }]
 // ----- svelte/no-useless-mustaches -----
 type SvelteNoUselessMustaches = []|[{
diff --git a/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts b/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts
index d425026f2..e117c2fae 100644
--- a/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts
+++ b/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts
@@ -8,6 +8,8 @@ import { getFilename } from '../utils/compat.js';
 
 type PropertyPath = string[];
 
+let isDeprecationWarningShown = false;
+
 export default createRule('no-unused-props', {
 	meta: {
 		docs: {
@@ -23,12 +25,21 @@ export default createRule('no-unused-props', {
 						type: 'boolean',
 						default: false
 					},
-					ignorePatterns: {
+					ignoreTypePatterns: {
 						type: 'array',
 						items: {
 							type: 'string'
 						},
 						default: []
+					},
+					ignorePropertyPatterns: {
+						type: 'array',
+						items: {
+							type: 'string'
+						},
+						// For example, valibot generates symbol like `__@BrandSymbol@1167`.
+						// So, we ignore properties starting with special characters often used for internal or framework-specific identifiers.
+						default: ['^[#$@_~]']
 					}
 				},
 				additionalProperties: false
@@ -61,6 +72,17 @@ export default createRule('no-unused-props', {
 		}
 
 		const options = context.options[0] ?? {};
+
+		// TODO: Remove in v4
+		// MEMO: `ignorePatterns` was a property that only existed from v3.2.0 to v3.2.1.
+		// From v3.3.0, it was replaced with `ignorePropertyPatterns` and `ignoreTypePatterns`.
+		if (options.ignorePatterns != null && !isDeprecationWarningShown) {
+			console.warn(
+				'eslint-plugin-svelte: The `ignorePatterns` option in the `no-unused-props` rule has been deprecated. Please use `ignorePropertyPatterns` and `ignoreTypePatterns` instead.'
+			);
+			isDeprecationWarningShown = true;
+		}
+
 		const checkImportedTypes = options.checkImportedTypes ?? false;
 		const ignorePatterns = (options.ignorePatterns ?? []).map((p: string | RegExp) => {
 			if (typeof p === 'string') {
@@ -69,15 +91,39 @@ export default createRule('no-unused-props', {
 			return p;
 		});
 
-		function shouldIgnore(name: string): boolean {
-			return ignorePatterns.some((pattern: RegExp) => pattern.test(name));
+		const ignoreTypePatterns = [
+			...ignorePatterns,
+			...(options.ignoreTypePatterns ?? []).map((p: string | RegExp) => {
+				if (typeof p === 'string') {
+					return toRegExp(p);
+				}
+				return p;
+			})
+		];
+
+		const ignorePropertyPatterns = [
+			...ignorePatterns,
+			...(options.ignorePropertyPatterns ?? [/^[#$@_~]/]).map((p: string | RegExp) => {
+				if (typeof p === 'string') {
+					return toRegExp(p);
+				}
+				return p;
+			})
+		];
+
+		function shouldIgnoreProperty(name: string): boolean {
+			return ignorePropertyPatterns.some((pattern: RegExp) => pattern.test(name));
 		}
 
 		function shouldIgnoreType(type: ts.Type): boolean {
+			function isMatched(name: string): boolean {
+				return ignoreTypePatterns.some((pattern: RegExp) => pattern.test(name));
+			}
+
 			const typeStr = typeChecker.typeToString(type);
 			const symbol = type.getSymbol();
 			const symbolName = symbol?.getName();
-			return shouldIgnore(typeStr) || (symbolName ? shouldIgnore(symbolName) : false);
+			return isMatched(typeStr) || (symbolName ? isMatched(symbolName) : false);
 		}
 
 		function isInternalProperty(symbol: ts.Symbol): boolean {
@@ -223,6 +269,8 @@ export default createRule('no-unused-props', {
 				if (!checkImportedTypes && !isInternalProperty(prop)) continue;
 
 				const propName = prop.getName();
+				if (shouldIgnoreProperty(propName)) continue;
+
 				const currentPath = [...parentPath, propName];
 				const currentPathStr = [...parentPath, propName].join('.');
 
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignore-property-patterns-custom-config.json b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignore-property-patterns-custom-config.json
new file mode 100644
index 000000000..65233c1d9
--- /dev/null
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignore-property-patterns-custom-config.json
@@ -0,0 +1,7 @@
+{
+	"options": [
+		{
+			"ignorePropertyPatterns": ["^foo$"]
+		}
+	]
+}
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignore-property-patterns-custom-errors.yaml b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignore-property-patterns-custom-errors.yaml
new file mode 100644
index 000000000..32c659188
--- /dev/null
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignore-property-patterns-custom-errors.yaml
@@ -0,0 +1,8 @@
+- message: "'foo' is an unused Props property."
+  line: 8
+  column: 8
+  suggestions: null
+- message: "'_foo' is an unused Props property."
+  line: 8
+  column: 8
+  suggestions: null
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignore-property-patterns-custom-input.svelte b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignore-property-patterns-custom-input.svelte
new file mode 100644
index 000000000..7bee93044
--- /dev/null
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignore-property-patterns-custom-input.svelte
@@ -0,0 +1,9 @@
+<script lang="ts">
+	interface Props {
+		foo: string;
+		_foo: string;
+		bar: string;
+	}
+
+	const { bar }: Props = $props();
+</script>
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignored-pattern-partial-config.json b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignored-pattern-partial-config.json
deleted file mode 100644
index c049eb81c..000000000
--- a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignored-pattern-partial-config.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-	"options": [
-		{
-			"ignorePatterns": [".*DTO$"]
-		}
-	]
-}
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignored-type-patterns-custom-config.json b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignored-type-patterns-custom-config.json
new file mode 100644
index 000000000..ee109aa43
--- /dev/null
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignored-type-patterns-custom-config.json
@@ -0,0 +1,7 @@
+{
+	"options": [
+		{
+			"ignoreTypePatterns": [".*DTO$"]
+		}
+	]
+}
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignored-pattern-partial-errors.yaml b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignored-type-patterns-custom-errors.yaml
similarity index 100%
rename from packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignored-pattern-partial-errors.yaml
rename to packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignored-type-patterns-custom-errors.yaml
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignored-pattern-partial-input.svelte b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignored-type-patterns-custom-input.svelte
similarity index 100%
rename from packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignored-pattern-partial-input.svelte
rename to packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/ignored-type-patterns-custom-input.svelte
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-custom-config.json b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-custom-config.json
new file mode 100644
index 000000000..cdf8212ac
--- /dev/null
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-custom-config.json
@@ -0,0 +1,7 @@
+{
+	"options": [
+		{
+			"ignorePropertyPatterns": ["/^foo$/"]
+		}
+	]
+}
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-custom-input.svelte b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-custom-input.svelte
new file mode 100644
index 000000000..60f11897c
--- /dev/null
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-custom-input.svelte
@@ -0,0 +1,8 @@
+<script lang="ts">
+	interface Props {
+		foo: string;
+		bar: string;
+	}
+
+	const { bar }: Props = $props();
+</script>
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-default-input.svelte b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-default-input.svelte
new file mode 100644
index 000000000..1dc0ca14d
--- /dev/null
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-default-input.svelte
@@ -0,0 +1,13 @@
+<script lang="ts">
+	interface Props {
+		_internal: string;
+		$store: boolean;
+		'@decorator': string;
+		'#private': number;
+		'~tilde': boolean;
+		normalUsed: string;
+	}
+
+	const { normalUsed }: Props = $props();
+	console.log(normalUsed);
+</script>
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-conditional-type-config.json b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-conditional-type-config.json
deleted file mode 100644
index 73df77c94..000000000
--- a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-conditional-type-config.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-	"options": [
-		{
-			"ignorePatterns": ["^Conditional"]
-		}
-	]
-}
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom-config.json b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom-config.json
new file mode 100644
index 000000000..3a5c1de84
--- /dev/null
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom-config.json
@@ -0,0 +1,7 @@
+{
+	"options": [
+		{
+			"ignoreTypePatterns": ["/^Conditional/"]
+		}
+	]
+}
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-conditional-type-input.svelte b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom-input.svelte
similarity index 100%
rename from packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-conditional-type-input.svelte
rename to packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom-input.svelte
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom2-config.json b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom2-config.json
new file mode 100644
index 000000000..347ef2b85
--- /dev/null
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom2-config.json
@@ -0,0 +1,7 @@
+{
+	"options": [
+		{
+			"ignoreTypePatterns": ["/^Internal/"]
+		}
+	]
+}
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom2-input.svelte b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom2-input.svelte
new file mode 100644
index 000000000..061e61792
--- /dev/null
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom2-input.svelte
@@ -0,0 +1,12 @@
+<script lang="ts">
+	interface InternalConfig {
+		secretKey: string;
+		debugMode: boolean;
+	}
+	interface Props {
+		config: InternalConfig;
+		value: number;
+	}
+	let { config, value }: Props = $props();
+	console.log(value, config);
+</script>

From 16c7f1f50364948399ac04014aee47f8c744ac7e Mon Sep 17 00:00:00 2001
From: baseballyama <xydybaseball@gmail.com>
Date: Mon, 17 Mar 2025 22:58:50 +0900
Subject: [PATCH 2/8] fix default option

---
 docs/rules/no-unused-props.md                         |  4 ++--
 .../eslint-plugin-svelte/src/rules/no-unused-props.ts |  6 ++----
 .../valid/ignore-property-patterns-custom-config.json |  2 +-
 .../ignore-property-patterns-custom-input.svelte      | 11 ++++++++---
 .../ignore-property-patterns-default-input.svelte     | 11 +++--------
 5 files changed, 16 insertions(+), 18 deletions(-)

diff --git a/docs/rules/no-unused-props.md b/docs/rules/no-unused-props.md
index 714c945e4..c488162fb 100644
--- a/docs/rules/no-unused-props.md
+++ b/docs/rules/no-unused-props.md
@@ -162,14 +162,14 @@ Note: Properties of class types are not checked for usage, as they might be used
     // Patterns to ignore when checking property types
     "ignoreTypePatterns": [],
     // Patterns to ignore when checking for unused props
-    "ignorePropertyPatterns": ["/^[#$@_~]/"],
+    "ignorePropertyPatterns": [],
   }]
 }
 ```
 
 - `checkImportedTypes` ... Controls whether to check properties from imported types. Default is `false`.
 - `ignoreTypePatterns` ... Patterns to ignore when checking property types. Default is `[]`.
-- `ignorePropertyPatterns` ... Patterns to ignore when checking for unused props. Default is `/["^[#$@_~]"]/`, which ignores properties starting with special characters often used for internal or framework-specific identifiers.
+- `ignorePropertyPatterns` ... Patterns to ignore when checking for unused props. Default is `[]`, which ignores properties starting with special characters often used for internal or framework-specific identifiers.
 
 Examples:
 
diff --git a/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts b/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts
index e117c2fae..4e2caf518 100644
--- a/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts
+++ b/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts
@@ -37,9 +37,7 @@ export default createRule('no-unused-props', {
 						items: {
 							type: 'string'
 						},
-						// For example, valibot generates symbol like `__@BrandSymbol@1167`.
-						// So, we ignore properties starting with special characters often used for internal or framework-specific identifiers.
-						default: ['^[#$@_~]']
+						default: []
 					}
 				},
 				additionalProperties: false
@@ -103,7 +101,7 @@ export default createRule('no-unused-props', {
 
 		const ignorePropertyPatterns = [
 			...ignorePatterns,
-			...(options.ignorePropertyPatterns ?? [/^[#$@_~]/]).map((p: string | RegExp) => {
+			...(options.ignorePropertyPatterns ?? []).map((p: string | RegExp) => {
 				if (typeof p === 'string') {
 					return toRegExp(p);
 				}
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-custom-config.json b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-custom-config.json
index cdf8212ac..c22dc1654 100644
--- a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-custom-config.json
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-custom-config.json
@@ -1,7 +1,7 @@
 {
 	"options": [
 		{
-			"ignorePropertyPatterns": ["/^foo$/"]
+			"ignorePropertyPatterns": ["/^[#$@_~]/"]
 		}
 	]
 }
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-custom-input.svelte b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-custom-input.svelte
index 60f11897c..1dc0ca14d 100644
--- a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-custom-input.svelte
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-custom-input.svelte
@@ -1,8 +1,13 @@
 <script lang="ts">
 	interface Props {
-		foo: string;
-		bar: string;
+		_internal: string;
+		$store: boolean;
+		'@decorator': string;
+		'#private': number;
+		'~tilde': boolean;
+		normalUsed: string;
 	}
 
-	const { bar }: Props = $props();
+	const { normalUsed }: Props = $props();
+	console.log(normalUsed);
 </script>
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-default-input.svelte b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-default-input.svelte
index 1dc0ca14d..5694cb2d7 100644
--- a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-default-input.svelte
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignore-property-patterns-default-input.svelte
@@ -1,13 +1,8 @@
 <script lang="ts">
 	interface Props {
-		_internal: string;
-		$store: boolean;
-		'@decorator': string;
-		'#private': number;
-		'~tilde': boolean;
-		normalUsed: string;
+		foo: string;
+		bar: string;
 	}
 
-	const { normalUsed }: Props = $props();
-	console.log(normalUsed);
+	const { foo, bar }: Props = $props();
 </script>

From 435691b14577b054436488a9102dd5b147faee52 Mon Sep 17 00:00:00 2001
From: baseballyama <xydybaseball@gmail.com>
Date: Mon, 17 Mar 2025 23:10:47 +0900
Subject: [PATCH 3/8] adjust

---
 .changeset/crazy-peas-laugh.md                |  2 +-
 docs/rules/no-unused-props.md                 |  2 +-
 .../src/rules/no-unused-props.ts              | 24 ++++++-------------
 3 files changed, 9 insertions(+), 19 deletions(-)

diff --git a/.changeset/crazy-peas-laugh.md b/.changeset/crazy-peas-laugh.md
index f46c78452..c3bbeeafd 100644
--- a/.changeset/crazy-peas-laugh.md
+++ b/.changeset/crazy-peas-laugh.md
@@ -2,4 +2,4 @@
 'eslint-plugin-svelte': minor
 ---
 
-feat: add `ignorePropertyPatterns` property and rename `ignorePatterns` to `ignoreTypePatterns` in `no-unused-props` rule. The `ignorePatterns` option existed only for a few days and is removed by this PR. Technically, this is a breaking change, but we’ll handle it as a minor release since very few users are likely affected.
+feat: add `ignorePropertyPatterns` property and rename `ignorePatterns` to `ignoreTypePatterns` in `no-unused-props` rule. The `ignorePatterns` option existed only for a few hours and is removed by this PR. Technically, this is a breaking change, but we’ll handle it as a minor release since very few users are likely affected.
diff --git a/docs/rules/no-unused-props.md b/docs/rules/no-unused-props.md
index c488162fb..5d12ccae6 100644
--- a/docs/rules/no-unused-props.md
+++ b/docs/rules/no-unused-props.md
@@ -211,7 +211,7 @@ Examples:
   /* eslint svelte/no-unused-props: ["error", { "ignorePropertyPatterns": ["/^_/"] }] */
   // Ignore properties with names matching the pattern
   interface Props {
-    _internal: string; // This prop won't be reported even if unused
+    _internal: string;
     value: number;
   }
   let { value }: Props = $props();
diff --git a/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts b/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts
index 4e2caf518..858806444 100644
--- a/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts
+++ b/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts
@@ -76,38 +76,28 @@ export default createRule('no-unused-props', {
 		// From v3.3.0, it was replaced with `ignorePropertyPatterns` and `ignoreTypePatterns`.
 		if (options.ignorePatterns != null && !isDeprecationWarningShown) {
 			console.warn(
-				'eslint-plugin-svelte: The `ignorePatterns` option in the `no-unused-props` rule has been deprecated. Please use `ignorePropertyPatterns` and `ignoreTypePatterns` instead.'
+				'eslint-plugin-svelte: The `ignorePatterns` option in the `no-unused-props` rule has been removed. Please use `ignorePropertyPatterns` or/and `ignoreTypePatterns` instead.'
 			);
 			isDeprecationWarningShown = true;
 		}
 
 		const checkImportedTypes = options.checkImportedTypes ?? false;
-		const ignorePatterns = (options.ignorePatterns ?? []).map((p: string | RegExp) => {
+
+		const ignoreTypePatterns = (options.ignoreTypePatterns ?? []).map((p: string | RegExp) => {
 			if (typeof p === 'string') {
 				return toRegExp(p);
 			}
 			return p;
 		});
 
-		const ignoreTypePatterns = [
-			...ignorePatterns,
-			...(options.ignoreTypePatterns ?? []).map((p: string | RegExp) => {
+		const ignorePropertyPatterns = (options.ignorePropertyPatterns ?? []).map(
+			(p: string | RegExp) => {
 				if (typeof p === 'string') {
 					return toRegExp(p);
 				}
 				return p;
-			})
-		];
-
-		const ignorePropertyPatterns = [
-			...ignorePatterns,
-			...(options.ignorePropertyPatterns ?? []).map((p: string | RegExp) => {
-				if (typeof p === 'string') {
-					return toRegExp(p);
-				}
-				return p;
-			})
-		];
+			}
+		);
 
 		function shouldIgnoreProperty(name: string): boolean {
 			return ignorePropertyPatterns.some((pattern: RegExp) => pattern.test(name));

From 0dc3ccb97ae47713ef83d1846fb1167ca736e6a6 Mon Sep 17 00:00:00 2001
From: baseballyama <xydybaseball@gmail.com>
Date: Mon, 17 Mar 2025 23:12:25 +0900
Subject: [PATCH 4/8] typo

---
 packages/eslint-plugin-svelte/src/rules/no-unused-props.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts b/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts
index 858806444..71001fc3a 100644
--- a/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts
+++ b/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts
@@ -8,7 +8,7 @@ import { getFilename } from '../utils/compat.js';
 
 type PropertyPath = string[];
 
-let isDeprecationWarningShown = false;
+let isRemovedWarningShown = false;
 
 export default createRule('no-unused-props', {
 	meta: {
@@ -74,11 +74,11 @@ export default createRule('no-unused-props', {
 		// TODO: Remove in v4
 		// MEMO: `ignorePatterns` was a property that only existed from v3.2.0 to v3.2.1.
 		// From v3.3.0, it was replaced with `ignorePropertyPatterns` and `ignoreTypePatterns`.
-		if (options.ignorePatterns != null && !isDeprecationWarningShown) {
+		if (options.ignorePatterns != null && !isRemovedWarningShown) {
 			console.warn(
 				'eslint-plugin-svelte: The `ignorePatterns` option in the `no-unused-props` rule has been removed. Please use `ignorePropertyPatterns` or/and `ignoreTypePatterns` instead.'
 			);
-			isDeprecationWarningShown = true;
+			isRemovedWarningShown = true;
 		}
 
 		const checkImportedTypes = options.checkImportedTypes ?? false;

From 3a1f47398f90494a88d380ec8c7ea5abbc5df2e5 Mon Sep 17 00:00:00 2001
From: baseballyama <xydybaseball@gmail.com>
Date: Mon, 17 Mar 2025 23:15:23 +0900
Subject: [PATCH 5/8] update

---
 docs/rules/no-unused-props.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/rules/no-unused-props.md b/docs/rules/no-unused-props.md
index 5d12ccae6..107fb15e3 100644
--- a/docs/rules/no-unused-props.md
+++ b/docs/rules/no-unused-props.md
@@ -168,8 +168,8 @@ Note: Properties of class types are not checked for usage, as they might be used
 ```
 
 - `checkImportedTypes` ... Controls whether to check properties from imported types. Default is `false`.
-- `ignoreTypePatterns` ... Patterns to ignore when checking property types. Default is `[]`.
-- `ignorePropertyPatterns` ... Patterns to ignore when checking for unused props. Default is `[]`, which ignores properties starting with special characters often used for internal or framework-specific identifiers.
+- `ignoreTypePatterns` ... Patterns to ignore when checking property types. Default is `[]` (no types are ignored by default). This option can be used to exclude certain types from being checked for unused properties, which is useful for utility or internal types.
+- `ignorePropertyPatterns` ... Patterns to ignore when checking for unused props. Default is `[]` (no properties are ignored by default). This option can be used to ignore properties starting with special characters often used for internal or framework-specific identifiers.
 
 Examples:
 

From 4170b9d61703625611ad17b760998342938da9b3 Mon Sep 17 00:00:00 2001
From: baseballyama <xydybaseball@gmail.com>
Date: Mon, 17 Mar 2025 23:32:30 +0900
Subject: [PATCH 6/8] improve

---
 docs/rules/no-unused-props.md                        |  6 +++---
 .../invalid/custom-config-combination-config.json    |  9 +++++++++
 .../invalid/custom-config-combination-errors.yaml    | 12 ++++++++++++
 .../invalid/custom-config-combination-input.svelte   | 12 ++++++++++++
 .../valid/custom-config-combination-config.json      |  9 +++++++++
 .../valid/custom-config-combination-input.svelte     | 11 +++++++++++
 .../rules/no-unused-props/valid/shared-types.ts      |  1 +
 7 files changed, 57 insertions(+), 3 deletions(-)
 create mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/custom-config-combination-config.json
 create mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/custom-config-combination-errors.yaml
 create mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/custom-config-combination-input.svelte
 create mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/custom-config-combination-config.json
 create mode 100644 packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/custom-config-combination-input.svelte

diff --git a/docs/rules/no-unused-props.md b/docs/rules/no-unused-props.md
index 107fb15e3..fe5c69a9d 100644
--- a/docs/rules/no-unused-props.md
+++ b/docs/rules/no-unused-props.md
@@ -167,9 +167,9 @@ Note: Properties of class types are not checked for usage, as they might be used
 }
 ```
 
-- `checkImportedTypes` ... Controls whether to check properties from imported types. Default is `false`.
-- `ignoreTypePatterns` ... Patterns to ignore when checking property types. Default is `[]` (no types are ignored by default). This option can be used to exclude certain types from being checked for unused properties, which is useful for utility or internal types.
-- `ignorePropertyPatterns` ... Patterns to ignore when checking for unused props. Default is `[]` (no properties are ignored by default). This option can be used to ignore properties starting with special characters often used for internal or framework-specific identifiers.
+- `checkImportedTypes` ... Controls whether to check properties from types defined in external files. Default is `false`, meaning the rule only checks types defined within the component file itself. When set to `true`, the rule will also check properties from imported and extended types.
+- `ignoreTypePatterns` ... Regular expression patterns for type names to exclude from checks. Default is `[]` (no exclusions). Most useful when `checkImportedTypes` is `true`, allowing you to exclude specific imported types (like utility types or third-party types) from being checked.
+- `ignorePropertyPatterns` ... Regular expression patterns for property names to exclude from unused checks. Default is `[]` (no exclusions). Most useful when `checkImportedTypes` is `true`, allowing you to ignore specific properties from external types that shouldn't trigger warnings.
 
 Examples:
 
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/custom-config-combination-config.json b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/custom-config-combination-config.json
new file mode 100644
index 000000000..57ebeb292
--- /dev/null
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/custom-config-combination-config.json
@@ -0,0 +1,9 @@
+{
+	"options": [
+		{
+			"checkImportedTypes": true,
+			"ignoreTypePatterns": ["BaseProps"],
+			"ignorePropertyPatterns": ["/^(_|baz)/"]
+		}
+	]
+}
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/custom-config-combination-errors.yaml b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/custom-config-combination-errors.yaml
new file mode 100644
index 000000000..52e74674f
--- /dev/null
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/custom-config-combination-errors.yaml
@@ -0,0 +1,12 @@
+- message: "'base' is an unused Props property."
+  line: 10
+  column: 6
+  suggestions: null
+- message: "'bar' in 'my_foo' is an unused property."
+  line: 10
+  column: 6
+  suggestions: null
+- message: "'qux' is an unused Props property."
+  line: 10
+  column: 6
+  suggestions: null
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/custom-config-combination-input.svelte b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/custom-config-combination-input.svelte
new file mode 100644
index 000000000..c0558eed7
--- /dev/null
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/invalid/custom-config-combination-input.svelte
@@ -0,0 +1,12 @@
+<script lang="ts">
+	import type { BaseProps, FooDTO } from './shared-types';
+	interface Props {
+		base: BaseProps;
+		my_foo: FooDTO;
+		_my_bar: string;
+		baz: string;
+		qux: string;
+	}
+	let { my_foo }: Props = $props();
+	console.log(my_foo.foo);
+</script>
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/custom-config-combination-config.json b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/custom-config-combination-config.json
new file mode 100644
index 000000000..57ebeb292
--- /dev/null
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/custom-config-combination-config.json
@@ -0,0 +1,9 @@
+{
+	"options": [
+		{
+			"checkImportedTypes": true,
+			"ignoreTypePatterns": ["BaseProps"],
+			"ignorePropertyPatterns": ["/^(_|baz)/"]
+		}
+	]
+}
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/custom-config-combination-input.svelte b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/custom-config-combination-input.svelte
new file mode 100644
index 000000000..c34bc850e
--- /dev/null
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/custom-config-combination-input.svelte
@@ -0,0 +1,11 @@
+<script lang="ts">
+	import type { BaseProps, FooDTO } from './shared-types';
+	interface Props {
+		base: BaseProps;
+		my_foo: FooDTO;
+		_my_bar: string;
+		baz: string;
+	}
+	let { base, my_foo }: Props = $props();
+	console.log(base.age, my_foo.foo, my_foo.bar);
+</script>
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/shared-types.ts b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/shared-types.ts
index e33a3a24e..76d6b33c5 100644
--- a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/shared-types.ts
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/shared-types.ts
@@ -1,5 +1,6 @@
 export interface BaseProps {
 	name: string;
+	age: number;
 }
 
 export interface FooDTO {

From 35a91e08f27880957e7aabf99c914f1df885ec2b Mon Sep 17 00:00:00 2001
From: baseballyama <xydybaseball@gmail.com>
Date: Mon, 17 Mar 2025 23:33:55 +0900
Subject: [PATCH 7/8] update

---
 docs/rules/no-unused-props.md                                 | 4 ++--
 .../valid/ignored-type-patterns-custom2-input.svelte          | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/docs/rules/no-unused-props.md b/docs/rules/no-unused-props.md
index fe5c69a9d..fffe3864f 100644
--- a/docs/rules/no-unused-props.md
+++ b/docs/rules/no-unused-props.md
@@ -197,11 +197,11 @@ Examples:
     debugMode: boolean;
   }
   interface Props {
-    config: InternalConfig; // Properties of InternalConfig won't be checked
+    config: InternalConfig;
     value: number;
   }
   let { config, value }: Props = $props();
-  console.log(value, config);
+  console.log(value, config.secretKey);
 </script>
 ```
 
diff --git a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom2-input.svelte b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom2-input.svelte
index 061e61792..0f465ea7d 100644
--- a/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom2-input.svelte
+++ b/packages/eslint-plugin-svelte/tests/fixtures/rules/no-unused-props/valid/ignored-type-patterns-custom2-input.svelte
@@ -8,5 +8,5 @@
 		value: number;
 	}
 	let { config, value }: Props = $props();
-	console.log(value, config);
+	console.log(value, config.secretKey);
 </script>

From 0619c15161a4747d0126a8c2b5c67ffc27aef8ff Mon Sep 17 00:00:00 2001
From: baseballyama <xydybaseball@gmail.com>
Date: Mon, 17 Mar 2025 23:34:39 +0900
Subject: [PATCH 8/8] tidy

---
 packages/eslint-plugin-svelte/src/rules/no-unused-props.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts b/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts
index 71001fc3a..84faa365e 100644
--- a/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts
+++ b/packages/eslint-plugin-svelte/src/rules/no-unused-props.ts
@@ -72,7 +72,7 @@ export default createRule('no-unused-props', {
 		const options = context.options[0] ?? {};
 
 		// TODO: Remove in v4
-		// MEMO: `ignorePatterns` was a property that only existed from v3.2.0 to v3.2.1.
+		// MEMO: `ignorePatterns` was a property that only existed from v3.2.0 to v3.2.2.
 		// From v3.3.0, it was replaced with `ignorePropertyPatterns` and `ignoreTypePatterns`.
 		if (options.ignorePatterns != null && !isRemovedWarningShown) {
 			console.warn(