diff --git a/packages/runtime/example/nested-components/index.html b/packages/runtime/example/nested-components/index.html
index 4361f320..d52a2928 100644
--- a/packages/runtime/example/nested-components/index.html
+++ b/packages/runtime/example/nested-components/index.html
@@ -26,6 +26,66 @@
               },
               traits: [],
             },
+            {
+              id: "btn",
+              type: "chakra_ui/v1/button",
+              properties: {
+                text: {
+                  raw: "in tab1",
+                  format: "plain",
+                },
+              },
+              traits: [
+                {
+                  type: "core/v1/slot",
+                  properties: {
+                    container: {
+                      id: "tabs",
+                      slot: "tab_content_0",
+                    },
+                  },
+                },
+              ],
+            },
+            {
+              id: "text",
+              type: "core/v1/text",
+              properties: {
+                value: {
+                  raw: "in tab2",
+                  format: "plain",
+                },
+              },
+              traits: [
+                {
+                  type: "core/v1/slot",
+                  properties: {
+                    container: {
+                      id: "tabs",
+                      slot: "tab_content_1",
+                    },
+                  },
+                },
+              ],
+            },
+            {
+              id: "nested_tabs",
+              type: "chakra_ui/v1/tabs",
+              properties: {
+                tabNames: ["Tab Three", "Tab Four"],
+              },
+              traits: [
+                {
+                  type: "core/v1/slot",
+                  properties: {
+                    container: {
+                      id: "tabs",
+                      slot: "tab_content_1",
+                    },
+                  },
+                },
+              ],
+            },
           ],
         },
       });
diff --git a/packages/runtime/src/App.tsx b/packages/runtime/src/App.tsx
index 8f79ee4d..dd9a72bc 100644
--- a/packages/runtime/src/App.tsx
+++ b/packages/runtime/src/App.tsx
@@ -1,4 +1,10 @@
-import React, { useCallback, useEffect, useRef, useState } from "react";
+import React, {
+  useCallback,
+  useEffect,
+  useMemo,
+  useRef,
+  useState,
+} from "react";
 import {
   Application,
   createApplication,
@@ -7,10 +13,13 @@ import {
 import { merge } from "lodash";
 import { registry } from "./registry";
 import { setStore, useStore, emitter } from "./store";
+import { ContainerPropertySchema } from "./traits/core/slot";
+import { Static } from "@sinclair/typebox";
 
 const ImplWrapper: React.FC<{
   component: RuntimeApplication["spec"]["components"][0];
-}> = ({ component: c }) => {
+  slotsMap: SlotsMap | undefined;
+}> = ({ component: c, slotsMap }) => {
   const Impl = registry.getComponent(
     c.parsedType.version,
     c.parsedType.name
@@ -68,6 +77,7 @@ const ImplWrapper: React.FC<{
       {...traitsProps}
       mergeState={mergeState}
       subscribeMethods={subscribeMethods}
+      slotsMap={slotsMap}
     />
   );
 };
@@ -107,13 +117,63 @@ const DebugEvent: React.FC = () => {
   );
 };
 
+export type ComponentsMap = Map<string, SlotsMap>;
+export type SlotsMap = Map<string, Array<React.FC>>;
+export function resolveNestedComponents(app: RuntimeApplication): {
+  topLevelComponents: RuntimeApplication["spec"]["components"];
+  componentsMap: ComponentsMap;
+} {
+  const topLevelComponents: RuntimeApplication["spec"]["components"] = [];
+  const componentsMap: ComponentsMap = new Map();
+
+  for (const c of app.spec.components) {
+    const slotTrait = c.traits.find((t) => t.parsedType.name === "slot");
+    if (slotTrait) {
+      const { id, slot } = (
+        slotTrait.properties as {
+          container: Static<typeof ContainerPropertySchema>;
+        }
+      ).container;
+      if (!componentsMap.has(id)) {
+        componentsMap.set(id, new Map());
+      }
+      if (!componentsMap.get(id)?.has(slot)) {
+        componentsMap.get(id)?.set(slot, []);
+      }
+      componentsMap
+        .get(id)
+        ?.get(slot)
+        ?.push(() => (
+          <ImplWrapper component={c} slotsMap={componentsMap.get(c.id)} />
+        ));
+    } else {
+      topLevelComponents.push(c);
+    }
+  }
+
+  return {
+    topLevelComponents,
+    componentsMap,
+  };
+}
+
 const App: React.FC<{ options: Application }> = ({ options }) => {
   const app = createApplication(options);
+  const { topLevelComponents, componentsMap } = useMemo(
+    () => resolveNestedComponents(app),
+    [app]
+  );
 
   return (
     <div className="App">
-      {app.spec.components.map((c) => {
-        return <ImplWrapper key={c.id} component={c} />;
+      {topLevelComponents.map((c) => {
+        return (
+          <ImplWrapper
+            key={c.id}
+            component={c}
+            slotsMap={componentsMap.get(c.id)}
+          />
+        );
       })}
       <DebugStore />
       <DebugEvent />
diff --git a/packages/runtime/src/components/_internal/Slot.tsx b/packages/runtime/src/components/_internal/Slot.tsx
new file mode 100644
index 00000000..ee27904c
--- /dev/null
+++ b/packages/runtime/src/components/_internal/Slot.tsx
@@ -0,0 +1,17 @@
+import React from "react";
+import { SlotsMap } from "../../App";
+
+const Slot: React.FC<{ slotsMap: SlotsMap | undefined; slot: string }> = ({
+  slotsMap,
+  slot,
+}) => {
+  return (
+    <>
+      {(slotsMap?.get(slot) || []).map((ImplWrapper, idx) => (
+        <ImplWrapper key={idx} />
+      ))}
+    </>
+  );
+};
+
+export default Slot;
diff --git a/packages/runtime/src/components/chakra-ui/Button.tsx b/packages/runtime/src/components/chakra-ui/Button.tsx
index 864e9c45..61d294e1 100644
--- a/packages/runtime/src/components/chakra-ui/Button.tsx
+++ b/packages/runtime/src/components/chakra-ui/Button.tsx
@@ -11,7 +11,14 @@ const Button: ComponentImplementation<{
   colorScheme?: Static<typeof ColorSchemePropertySchema>;
   isLoading?: Static<typeof IsLoadingPropertySchema>;
   onClick?: () => void;
-}> = ({ text, mergeState, subscribeMethods, onClick, ...rest }) => {
+}> = ({
+  text,
+  mergeState,
+  subscribeMethods,
+  onClick,
+  colorScheme,
+  isLoading,
+}) => {
   const raw = useExpression(text.raw);
   useEffect(() => {
     mergeState({ value: raw });
@@ -28,7 +35,7 @@ const Button: ComponentImplementation<{
 
   return (
     <ChakraProvider>
-      <BaseButton {...rest} ref={ref} onClick={onClick}>
+      <BaseButton {...{ colorScheme, isLoading }} ref={ref} onClick={onClick}>
         <Text value={{ ...text, raw }} />
       </BaseButton>
     </ChakraProvider>
diff --git a/packages/runtime/src/components/chakra-ui/Tabs.tsx b/packages/runtime/src/components/chakra-ui/Tabs.tsx
index 1b997f83..c9a3ecb0 100644
--- a/packages/runtime/src/components/chakra-ui/Tabs.tsx
+++ b/packages/runtime/src/components/chakra-ui/Tabs.tsx
@@ -8,15 +8,16 @@ import {
   TabPanel,
   ChakraProvider,
 } from "@chakra-ui/react";
-import { ComponentImplementation } from "../../registry";
 import { Type, Static } from "@sinclair/typebox";
+import { ComponentImplementation } from "../../registry";
+import Slot from "../_internal/Slot";
 
 const Tabs: ComponentImplementation<{
   tabNames: Static<typeof TabNamesPropertySchema>;
   initialSelectedTabIndex?: Static<
     typeof InitialSelectedTabIndexPropertySchema
   >;
-}> = ({ tabNames, mergeState, initialSelectedTabIndex }) => {
+}> = ({ tabNames, mergeState, initialSelectedTabIndex, slotsMap }) => {
   const [selectedTabIndex, setSelectedTabIndex] = useState(
     initialSelectedTabIndex ?? 0
   );
@@ -37,9 +38,9 @@ const Tabs: ComponentImplementation<{
           ))}
         </TabList>
         <TabPanels>
-          {tabNames.map((name, idx) => (
+          {tabNames.map((_, idx) => (
             <TabPanel key={idx}>
-              <p>{name}</p>
+              <Slot slotsMap={slotsMap} slot={`tab_content_${idx}`} />
             </TabPanel>
           ))}
         </TabPanels>
diff --git a/packages/runtime/src/registry.tsx b/packages/runtime/src/registry.tsx
index 6c376a26..47435ed7 100644
--- a/packages/runtime/src/registry.tsx
+++ b/packages/runtime/src/registry.tsx
@@ -1,6 +1,7 @@
 import React from "react";
 import { RuntimeComponent, RuntimeTrait } from "@meta-ui/core";
 import { setStore } from "./store";
+import { SlotsMap } from "./App";
 // components
 import PlainButton from "./components/plain/Button";
 import CoreText from "./components/core/Text";
@@ -9,6 +10,7 @@ import ChakraUITabs from "./components/chakra-ui/Tabs";
 // traits
 import CoreState from "./traits/core/state";
 import CoreEvent from "./traits/core/event";
+import CoreSlot from "./traits/core/slot";
 
 type ImplementedRuntimeComponent = RuntimeComponent & {
   impl: ComponentImplementation;
@@ -29,6 +31,7 @@ export type ComponentImplementation<T = any> = React.FC<
   T & {
     mergeState: MergeState;
     subscribeMethods: SubscribeMethods;
+    slotsMap: SlotsMap | undefined;
   }
 >;
 
@@ -93,3 +96,4 @@ registry.registerComponent(ChakraUITabs);
 
 registry.registerTrait(CoreState);
 registry.registerTrait(CoreEvent);
+registry.registerTrait(CoreSlot);
diff --git a/packages/runtime/src/store.ts b/packages/runtime/src/store.ts
index 7ad214fe..be8bd431 100644
--- a/packages/runtime/src/store.ts
+++ b/packages/runtime/src/store.ts
@@ -7,9 +7,41 @@ export const useStore = create<Record<string, any>>(() => ({}));
 
 export const setStore = useStore.setState;
 
+export function parseExpression(raw: string): {
+  dynamic: boolean;
+  expression: string;
+} {
+  if (!raw) {
+    return {
+      dynamic: false,
+      expression: raw,
+    };
+  }
+  const matchArr = raw.match(/{{(.+)}}/);
+  if (!matchArr) {
+    return {
+      dynamic: false,
+      expression: raw,
+    };
+  }
+  return {
+    dynamic: true,
+    expression: matchArr[1],
+  };
+}
+
 // TODO: use web worker
-export function evalInContext(expression: string, ctx: Record<string, any>) {
+export function evalInContext(raw: string, ctx: Record<string, any>) {
   try {
+    const { dynamic, expression } = parseExpression(raw);
+    if (!dynamic) {
+      try {
+        // covert primitive types
+        return eval(expression);
+      } catch (error) {
+        return expression;
+      }
+    }
     Object.keys(ctx).forEach((key) => {
       // @ts-ignore
       self[key] = ctx[key];
@@ -26,40 +58,16 @@ export function evalInContext(expression: string, ctx: Record<string, any>) {
   }
 }
 export function useExpression(raw: string) {
-  const { dynamic, expression } = useMemo(() => {
-    if (!raw) {
-      return {
-        dynamic: false,
-        expression: raw,
-      };
-    }
-    const matchArr = raw.match(/{{(.+)}}/);
-    if (!matchArr) {
-      return {
-        dynamic: false,
-        expression: raw,
-      };
-    }
-    return {
-      dynamic: true,
-      expression: matchArr[1],
-    };
-  }, [raw]);
-
   const [state, setState] = useState<any>(
-    evalInContext(expression, useStore.getState())
+    evalInContext(raw, useStore.getState())
   );
 
-  if (!dynamic) {
-    return state;
-  }
-
   useStore.subscribe(
     (value) => {
       setState(value);
     },
     (state) => {
-      return evalInContext(expression, state);
+      return evalInContext(raw, state);
     }
   );
 
diff --git a/packages/runtime/src/traits/core/slot.ts b/packages/runtime/src/traits/core/slot.ts
new file mode 100644
index 00000000..905667f8
--- /dev/null
+++ b/packages/runtime/src/traits/core/slot.ts
@@ -0,0 +1,28 @@
+import { createTrait } from "@meta-ui/core";
+import { Type } from "@sinclair/typebox";
+
+export const ContainerPropertySchema = Type.Object({
+  id: Type.String(),
+  slot: Type.String(),
+});
+
+export default {
+  ...createTrait({
+    version: "core/v1",
+    metadata: {
+      name: "slot",
+      description: "nested components by slots",
+    },
+    spec: {
+      properties: [
+        {
+          name: "container",
+          ...ContainerPropertySchema,
+        },
+      ],
+      state: {},
+      methods: [],
+    },
+  }),
+  impl: () => {},
+};