diff --git a/components/lib/passthrough/index.js b/components/lib/passthrough/index.js
index e00cf4406..4c63d173b 100644
--- a/components/lib/passthrough/index.js
+++ b/components/lib/passthrough/index.js
@@ -1,19 +1,46 @@
+import { ObjectUtils } from 'primevue/utils';
 import { mergeProps } from 'vue';
 
-// @todo: Improve this method
-export const usePassThrough = (theme, pt = {}, { merge = false }) => {
-    const newTheme = { ...theme };
-    const componentNames = Object.keys(pt);
+export const usePassThrough = (pt1 = {}, pt2 = {}, { merge = true, useMergeProps = false, ignoredKeysOnMerge = [], customizer = undefined } = {}) => {
+    const newPT = { ...pt1 };
 
-    return componentNames.reduce((t, n) => {
-        if (!merge) {
-            t[n] = pt[n];
-        } else {
-            t[n] = Object.entries(pt[n]).reduce((_t, [sk, sv]) => {
-                return mergeProps(t[n][sk], sv);
-            }, {});
-        }
+    if (merge) {
+        const getPTClassValue = (value) => (ObjectUtils.isString(value) || ObjectUtils.isArray(value) ? { class: value } : value);
 
-        return t;
-    }, newTheme);
+        const setOptionValue = (to, from, nestedKey, ignoredKey) => {
+            const keys = nestedKey.split('.');
+            const key = keys.shift();
+            const getValue = (value) => (ObjectUtils.isFunction(customizer) ? customizer({ key, to, from, value }) : value);
+
+            if (!!ignoredKey && ignoredKey.endsWith(key)) {
+                !!key && (to[key] = getValue(from[key]));
+            } else {
+                const matched = [Object.keys(to[key] || {}), Object.keys(from[key] || {})].flat().some((k) => k.match(/^(class|style|on(.+))/));
+
+                if (matched) {
+                    to[key] = getValue(useMergeProps ? mergeProps(getPTClassValue(to[key]), getPTClassValue(from[key])) : { ...getPTClassValue(to[key]), ...getPTClassValue(from[key]) });
+                } else if (ObjectUtils.isNotEmpty(from[key])) {
+                    to[key] = { ...to[key] };
+                    setOptionValue(to[key], from[key], keys.join('.'), ignoredKey);
+                } else if (!!key) {
+                    to[key] = getValue(from[key]);
+                }
+            }
+        };
+
+        const nestedKeys = ObjectUtils.nestedKeys(pt2);
+
+        nestedKeys.forEach((nestedKey) => {
+            setOptionValue(
+                newPT,
+                pt2,
+                nestedKey,
+                ignoredKeysOnMerge.find((k) => (k.indexOf('.') > 0 ? nestedKey.startsWith(k) : nestedKey.split('.')[0] === k))
+            );
+        });
+    } else {
+        Object.keys(pt2).forEach((key) => (newPT[key] = pt2[key]));
+    }
+
+    return newPT;
 };
diff --git a/components/lib/utils/ObjectUtils.js b/components/lib/utils/ObjectUtils.js
index ff3dd9fe1..1b665c797 100755
--- a/components/lib/utils/ObjectUtils.js
+++ b/components/lib/utils/ObjectUtils.js
@@ -286,5 +286,15 @@ export default {
         }
 
         return index;
+    },
+
+    nestedKeys(obj = {}, parentKey = '') {
+        return Object.entries(obj).reduce((o, [key, value]) => {
+            const currentKey = parentKey ? `${parentKey}.${key}` : key;
+
+            this.isObject(value) ? (o = o.concat(this.nestedKeys(value, currentKey))) : o.push(currentKey);
+
+            return o;
+        }, []);
     }
 };