Apply suggestions from code review

Co-authored-by: Flo Edelmann <[email protected]>

Author: lucaswerkmeister

lib/rules/no-v-html.js

@@ -21,7 +21,8 @@ module.exports = {
         ignorePattern: {
           type: 'string'
         }
-      }
+      },
+      additionalProperties: false
     }],
     messages: {
       unexpected: "'v-html' directive can lead to XSS attack."
@@ -30,15 +31,14 @@ module.exports = {
   /** @param {RuleContext} context */
   create(context) {
     const options = context.options[0]
-    let ignoredVarMatcher = null
-    if (options?.ignorePattern) {
-      ignoredVarMatcher = toRegExp(options.ignorePattern, { remove: 'g' })
-    }
+    const ignoredVarMatcher = options?.ignorePattern
+      ? toRegExp(options.ignorePattern, { remove: 'g' })
+      : undefined
 
     return utils.defineTemplateBodyVisitor(context, {
       /** @param {VDirective} node */
       "VAttribute[directive=true][key.name.name='html']"(node) {
-        if (ignoredVarMatcher !== null && node.value.expression.type === 'Identifier' && ignoredVarMatcher.test(node.value.expression.name)) {
+        if (ignoredVarMatcher && node.value.expression.type === 'Identifier' && ignoredVarMatcher.test(node.value.expression.name)) {
           return
         }
         context.report({