diff --git a/framework/src/Volo.Abp.AspNetCore.Components.WebAssembly.Theming/AbpUtilsService.cs b/framework/src/Volo.Abp.AspNetCore.Components.WebAssembly.Theming/AbpUtilsService.cs
new file mode 100644
index 0000000000..006674e7c5
--- /dev/null
+++ b/framework/src/Volo.Abp.AspNetCore.Components.WebAssembly.Theming/AbpUtilsService.cs
@@ -0,0 +1,31 @@
+using System.Threading.Tasks;
+using Microsoft.JSInterop;
+using Volo.Abp.DependencyInjection;
+
+namespace Volo.Abp.AspNetCore.Components.WebAssembly.Theming
+{
+    public class AbpUtilsService : IAbpUtilsService, ITransientDependency
+    {
+        protected IJSRuntime JsRuntime { get; }
+
+        public AbpUtilsService(IJSRuntime jsRuntime)
+        {
+            JsRuntime = jsRuntime;
+        }
+
+        public ValueTask AddClassToTagAsync(string tagName, string className)
+        {
+            return JsRuntime.InvokeVoidAsync("abp.utils.addClassToTag", tagName, className);
+        }
+
+        public ValueTask RemoveClassFromTagAsync(string tagName, string className)
+        {
+            return JsRuntime.InvokeVoidAsync("abp.utils.removeClassFromTag", tagName, className);
+        }
+
+        public ValueTask<bool> HasClassOnTag(string tagName, string className)
+        {
+            return JsRuntime.InvokeAsync<bool>("abp.utils.hasClassOnTag", tagName, className);
+        }
+    }
+}
\ No newline at end of file
diff --git a/framework/src/Volo.Abp.AspNetCore.Components.WebAssembly.Theming/IAbpUtilsService.cs b/framework/src/Volo.Abp.AspNetCore.Components.WebAssembly.Theming/IAbpUtilsService.cs
new file mode 100644
index 0000000000..dddea5ff4f
--- /dev/null
+++ b/framework/src/Volo.Abp.AspNetCore.Components.WebAssembly.Theming/IAbpUtilsService.cs
@@ -0,0 +1,11 @@
+using System.Threading.Tasks;
+
+namespace Volo.Abp.AspNetCore.Components.WebAssembly.Theming
+{
+    public interface IAbpUtilsService
+    {
+        ValueTask AddClassToTagAsync(string tagName, string className);
+        ValueTask RemoveClassFromTagAsync(string tagName, string className);
+        ValueTask<bool> HasClassOnTag(string tagName, string className);
+    }
+}
diff --git a/framework/src/Volo.Abp.AspNetCore.Components.WebAssembly.Theming/wwwroot/abp_theming.js b/framework/src/Volo.Abp.AspNetCore.Components.WebAssembly.Theming/wwwroot/abp_theming.js
new file mode 100644
index 0000000000..7c7032ebbe
--- /dev/null
+++ b/framework/src/Volo.Abp.AspNetCore.Components.WebAssembly.Theming/wwwroot/abp_theming.js
@@ -0,0 +1,27 @@
+var abp = abp || {};
+(function () {
+    abp.utils = abp.utils || {};
+
+    abp.utils.addClassToTag = function (tagName, className) {
+        var tags = document.getElementsByTagName(tagName);
+        for (var i = 0; i < tags.length; i++) {
+            tags[i].classList.add(className);
+        }
+    };
+
+    abp.utils.removeClassFromTag = function (tagName, className) {
+        var tags = document.getElementsByTagName(tagName);
+        for (var i = 0; i < tags.length; i++) {
+            tags[i].classList.remove(className);
+        }
+    };
+
+    abp.utils.hasClassOnTag = function (tagName, className) {
+        var tags = document.getElementsByTagName(tagName);
+        if(tags.length){
+            return tags[0].classList.contains(className);
+        }
+
+        return false;
+    };
+})();