diff --git a/federjs/Feder.js b/federjs/Feder.js
index 435d7aa..295bc6b 100644
--- a/federjs/Feder.js
+++ b/federjs/Feder.js
@@ -29,6 +29,8 @@ export default class Feder {
     } else {
       // todo
     }
+
+    this.setSearchParamsPromise = null;
   }
 
   overview() {
@@ -36,7 +38,10 @@ export default class Feder {
   }
   search(target = null, targetMediaUrl = null) {
     if (target) {
-      const searchResPromise = this.initCoreAndViewPromise.then(() => {
+      const searchResPromise = Promise.all([
+        this.initCoreAndViewPromise,
+        this.setSearchParamsPromise,
+      ]).then(() => {
         const searchRes = this.core.search(target);
         console.log(searchRes);
         this.searchRes = searchRes;
@@ -92,12 +97,16 @@ export default class Feder {
     return this.federView.search({ searchResPromise });
   }
 
-  async setSearchParams(params) {
-    this.initCoreAndViewPromise && (await this.initCoreAndViewPromise);
-    if (!this.core) {
-      console.error('No feder-core');
-    } else {
-      this.core.setSearchParams(params);
-    }
+  setSearchParams(params) {
+    this.setSearchParamsPromise = new Promise(async (resolve) => {
+      this.initCoreAndViewPromise && (await this.initCoreAndViewPromise);
+      if (!this.core) {
+        console.error('No feder-core');
+      } else {
+        this.core.setSearchParams(params);
+      }
+      resolve();
+    });
+    return this;
   }
 }
diff --git a/package.json b/package.json
index b92167e..e53069d 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@zilliz/feder",
   "author": "ued@zilliz.com",
-  "version": "0.2.1",
+  "version": "0.2.2",
   "description": "visualization packages for vector space",
   "main": "dist/index.js",
   "files": [
diff --git a/test/bundle.js b/test/bundle.js
index 45ecf1c..27ad23d 100644
--- a/test/bundle.js
+++ b/test/bundle.js
@@ -17879,13 +17879,17 @@ ${indentData}`);
         });
       } else {
       }
+      this.setSearchParamsPromise = null;
     }
     overview() {
       return this.federView.overview(this.initCoreAndViewPromise);
     }
     search(target = null, targetMediaUrl = null) {
       if (target) {
-        const searchResPromise = this.initCoreAndViewPromise.then(() => {
+        const searchResPromise = Promise.all([
+          this.initCoreAndViewPromise,
+          this.setSearchParamsPromise
+        ]).then(() => {
           const searchRes = this.core.search(target);
           console.log(searchRes);
           this.searchRes = searchRes;
@@ -17934,14 +17938,16 @@ ${indentData}`);
       return this.federView.search({ searchResPromise });
     }
     setSearchParams(params) {
-      return __async(this, null, function* () {
+      this.setSearchParamsPromise = new Promise((resolve) => __async(this, null, function* () {
         this.initCoreAndViewPromise && (yield this.initCoreAndViewPromise);
         if (!this.core) {
           console.error("No feder-core");
         } else {
           this.core.setSearchParams(params);
         }
-      });
+        resolve();
+      }));
+      return this;
     }
   };
 
@@ -17979,10 +17985,8 @@ ${indentData}`);
     });
     document.querySelector(domSelector).appendChild(feder.overview());
     document.querySelector(domSelector).appendChild(feder.searchRandTestVec());
-    feder.setSearchParams({ k: 4, nprobe: 6, ef: 6 });
-    document.querySelector(domSelector).appendChild(feder.searchById(4365));
-    feder.setSearchParams({ k: 6, nprobe: 10, ef: 8 });
-    document.querySelector(domSelector).appendChild(feder.searchRandTestVec());
+    document.querySelector(domSelector).appendChild(feder.setSearchParams({ k: 4, nprobe: 6, ef: 6 }).searchById(4365));
+    document.querySelector(domSelector).appendChild(feder.setSearchParams({ k: 6, nprobe: 10, ef: 8 }).searchRandTestVec());
     document.querySelector(domSelector).appendChild(feder.overview());
   }));
 })();
diff --git a/test/test.js b/test/test.js
index 5f949c7..0afa289 100644
--- a/test/test.js
+++ b/test/test.js
@@ -114,9 +114,16 @@ window.addEventListener('DOMContentLoaded', async () => {
 
   document.querySelector(domSelector).appendChild(feder.overview());
   document.querySelector(domSelector).appendChild(feder.searchRandTestVec());
-  feder.setSearchParams({ k: 4, nprobe: 6, ef: 6 });
-  document.querySelector(domSelector).appendChild(feder.searchById(4365));
-  feder.setSearchParams({ k: 6, nprobe: 10, ef: 8 });
-  document.querySelector(domSelector).appendChild(feder.searchRandTestVec());
+
+  document
+    .querySelector(domSelector)
+    .appendChild(
+      feder.setSearchParams({ k: 4, nprobe: 6, ef: 6 }).searchById(4365)
+    );
+  document
+    .querySelector(domSelector)
+    .appendChild(
+      feder.setSearchParams({ k: 6, nprobe: 10, ef: 8 }).searchRandTestVec()
+    );
   document.querySelector(domSelector).appendChild(feder.overview());
 });