From 1d7d501828a9f4fd538572956f92155e3bfd0bee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89ric=20Le=20Ma=C3=AEtre?=
 <eric.erwan.le.maitre@gmail.com>
Date: Sat, 8 Nov 2025 13:25:41 +0100
Subject: [PATCH 1/2] test: testing strict ignore pattern

---
 tests/lib/rules/no-undef-components.js | 35 ++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/tests/lib/rules/no-undef-components.js b/tests/lib/rules/no-undef-components.js
index 37a3bec68..0ef4580a6 100644
--- a/tests/lib/rules/no-undef-components.js
+++ b/tests/lib/rules/no-undef-components.js
@@ -108,6 +108,7 @@ tester.run('no-undef-components', rule, {
         }
       ]
     },
+
     // circular references
     {
       filename: 'test.vue',
@@ -685,6 +686,7 @@ tester.run('no-undef-components', rule, {
       }
     }
   ],
+
   invalid: [
     // <script setup>
     {
@@ -843,6 +845,39 @@ tester.run('no-undef-components', rule, {
       ]
     },
 
+    // Strict ignore pattern
+    {
+      filename: 'test.vue',
+      code: `
+      <template>
+        <FooBar />
+      </template>
+      `,
+      options: [{ ignorePatterns: ['Foo'] }],
+      errors: [
+        {
+          message: "The '<FooBar>' component has been used, but not defined.",
+          line: 3
+        }
+      ]
+    },
+
+    {
+      filename: 'test.vue',
+      code: `
+      <template>
+        <Foo />
+      </template>
+      `,
+      options: [{ ignorePatterns: ['Foo'] }],
+      errors: [
+        {
+          message: "The '<Foo>' component has been used, but not defined.",
+          line: 3
+        }
+      ]
+    },
+
     // options API
     {
       filename: 'test.vue',

From c23f0ad2aae1b3dc45060a43153da03d47ae9a36 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89ric=20Le=20Ma=C3=AEtre?=
 <eric.erwan.le.maitre@gmail.com>
Date: Sat, 8 Nov 2025 13:49:13 +0100
Subject: [PATCH 2/2] feat: add strict option to rule

---
 lib/rules/no-undef-components.js       | 10 +++++++++-
 tests/lib/rules/no-undef-components.js |  7 ++++---
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/lib/rules/no-undef-components.js b/lib/rules/no-undef-components.js
index 4371add7c..3c094fca1 100644
--- a/lib/rules/no-undef-components.js
+++ b/lib/rules/no-undef-components.js
@@ -120,6 +120,9 @@ module.exports = {
         properties: {
           ignorePatterns: {
             type: 'array'
+          },
+          strict: {
+            type: 'boolean'
           }
         },
         additionalProperties: false
@@ -155,10 +158,15 @@ module.exports = {
         return false
       }
       const pascalCaseName = casing.pascalCase(rawName)
+
       // Check ignored patterns
       if (
         ignorePatterns.some((pattern) => {
-          const regExp = new RegExp(pattern)
+          const regExp = new RegExp(
+            options.strict === true || options.strict === undefined
+              ? `^${pattern}$`
+              : pattern
+          )
           return (
             regExp.test(rawName) ||
             regExp.test(kebabCaseName) ||
diff --git a/tests/lib/rules/no-undef-components.js b/tests/lib/rules/no-undef-components.js
index 0ef4580a6..ce7757c75 100644
--- a/tests/lib/rules/no-undef-components.js
+++ b/tests/lib/rules/no-undef-components.js
@@ -853,7 +853,7 @@ tester.run('no-undef-components', rule, {
         <FooBar />
       </template>
       `,
-      options: [{ ignorePatterns: ['Foo'] }],
+      options: [{ ignorePatterns: ['Foo'], strict: true }],
       errors: [
         {
           message: "The '<FooBar>' component has been used, but not defined.",
@@ -862,17 +862,18 @@ tester.run('no-undef-components', rule, {
       ]
     },
 
+    // Default to strict
     {
       filename: 'test.vue',
       code: `
       <template>
-        <Foo />
+        <FooBar />
       </template>
       `,
       options: [{ ignorePatterns: ['Foo'] }],
       errors: [
         {
-          message: "The '<Foo>' component has been used, but not defined.",
+          message: "The '<FooBar>' component has been used, but not defined.",
           line: 3
         }
       ]