diff --git a/src/adaptive.ts b/src/adaptive.ts
index 91b5c2a..0151557 100644
--- a/src/adaptive.ts
+++ b/src/adaptive.ts
@@ -28,7 +28,7 @@ export default function adaptive(): Adapter | undefined {
 
   let adapter: Adapter | undefined;
 
-  while (stack.length !== 0 && adapter === undefined) {
+  while (stack.length !== 0 && adapter === void 0) {
     try {
       adapter = (stack.shift() as () => Adapter)();
     } catch (err) {}
diff --git a/src/core/Axios.ts b/src/core/Axios.ts
index b897546..17cc9ae 100644
--- a/src/core/Axios.ts
+++ b/src/core/Axios.ts
@@ -43,7 +43,7 @@ export default class AxiosClass implements Axios {
   }
 
   public options<T extends Data>(url: string, config?: AxiosRequestConfig): Promise<AxiosResponse<T>> {
-    return this._requestMethodWithoutParams<T>('options', url, undefined, config);
+    return this._requestMethodWithoutParams<T>('options', url, void 0, config);
   }
 
   public get<T extends Data>(url: string, params?: Params, config?: AxiosRequestConfig): Promise<AxiosResponse<T>> {
@@ -67,11 +67,11 @@ export default class AxiosClass implements Axios {
   }
 
   public trace<T extends Data>(url: string, config?: AxiosRequestConfig): Promise<AxiosResponse<T>> {
-    return this._requestMethodWithoutParams<T>('trace', url, undefined, config);
+    return this._requestMethodWithoutParams<T>('trace', url, void 0, config);
   }
 
   public connect<T extends Data>(url: string, config?: AxiosRequestConfig): Promise<AxiosResponse<T>> {
-    return this._requestMethodWithoutParams<T>('connect', url, undefined, config);
+    return this._requestMethodWithoutParams<T>('connect', url, void 0, config);
   }
 
   /**
diff --git a/src/core/dispatchRequest.ts b/src/core/dispatchRequest.ts
index 561b7d8..54c2357 100644
--- a/src/core/dispatchRequest.ts
+++ b/src/core/dispatchRequest.ts
@@ -39,7 +39,7 @@ export default function dispatchRequest(config: AxiosRequestConfig): Promise<Axi
     if (!isCancel(reason)) {
       throwIfCancellationRequested(config);
 
-      if (reason.response !== undefined) {
+      if (reason.response !== void 0) {
         reason.response.data = transformData(reason.response.data, reason.response.headers, config.transformResponse);
       }
     }
diff --git a/src/core/flattenHeaders.ts b/src/core/flattenHeaders.ts
index 134b60d..f1db5f4 100644
--- a/src/core/flattenHeaders.ts
+++ b/src/core/flattenHeaders.ts
@@ -10,7 +10,7 @@ import { methodToLowercase } from './transformMethod';
 export default function flattenHeaders(config: AxiosRequestConfig): Headers {
   const { headers } = config;
 
-  if (headers === undefined) {
+  if (headers === void 0) {
     return {};
   }
 
diff --git a/src/core/mergeConfig.ts b/src/core/mergeConfig.ts
index fb50348..53a8daa 100644
--- a/src/core/mergeConfig.ts
+++ b/src/core/mergeConfig.ts
@@ -30,7 +30,7 @@ type DeepMergeConfigKey = 'params' | 'headers';
  */
 function onlyFromConfig2(keys: OnlyFromConfig2Key[], config: AxiosRequestConfig, config2: AxiosRequestConfig) {
   keys.forEach((key) => {
-    if (config2[key] !== undefined) {
+    if (config2[key] !== void 0) {
       config[key] = config2[key] as any;
     }
   });
@@ -51,9 +51,9 @@ function priorityFromConfig2(
   config2: AxiosRequestConfig
 ) {
   keys.forEach((key) => {
-    if (config2[key] !== undefined) {
+    if (config2[key] !== void 0) {
       config[key] = config2[key] as any;
-    } else if (config1[key] !== undefined) {
+    } else if (config1[key] !== void 0) {
       config[key] = config1[key] as any;
     }
   });
diff --git a/src/core/request.ts b/src/core/request.ts
index 5878eee..f395fc9 100644
--- a/src/core/request.ts
+++ b/src/core/request.ts
@@ -27,7 +27,7 @@ export default function request(config: AxiosRequestConfig): Promise<AxiosRespon
       reject(createError(message, config, requestConfig, response));
     }
 
-    if (adapter === undefined) {
+    if (adapter === void 0) {
       catchError('平台适配失败，您需要参阅文档使用自定义适配器手动适配当前平台');
 
       return;
@@ -41,7 +41,7 @@ export default function request(config: AxiosRequestConfig): Promise<AxiosRespon
     function handleResponse(res: Response): void {
       const response = transformResponse(res, config);
 
-      if (config.validateStatus === undefined || config.validateStatus(response.status)) {
+      if (config.validateStatus === void 0 || config.validateStatus(response.status)) {
         resolve(response);
       } else {
         catchError(`请求失败，状态码为 ${response.status}`, response);
@@ -57,9 +57,9 @@ export default function request(config: AxiosRequestConfig): Promise<AxiosRespon
 
     // 如果存在取消令牌
     // 则调用取消令牌里的 listener 监听用户的取消操作
-    if (cancelToken !== undefined) {
+    if (cancelToken !== void 0) {
       cancelToken.listener.then(function onCanceled(reason): void {
-        if (task !== undefined) {
+        if (task !== void 0) {
           task.abort();
         }
 
diff --git a/src/core/transformData.ts b/src/core/transformData.ts
index 9fda6d9..62b1c53 100644
--- a/src/core/transformData.ts
+++ b/src/core/transformData.ts
@@ -12,7 +12,7 @@ export default function transformData(
   headers: Headers,
   transforms?: TransformData | TransformData[]
 ): Data {
-  if (transforms === undefined) {
+  if (transforms === void 0) {
     return data;
   }
 
diff --git a/src/helpers/buildURL.ts b/src/helpers/buildURL.ts
index 56468ad..65cc703 100644
--- a/src/helpers/buildURL.ts
+++ b/src/helpers/buildURL.ts
@@ -36,7 +36,7 @@ function paramsSerialization(params: AnyObject): string {
   const parts: string[] = [];
 
   Object.entries(params).forEach(function encodeKeyValue([key, value]): void {
-    if (value === null || value === undefined || value !== value) {
+    if (value === null || value === void 0 || value !== value) {
       return;
     }
 
diff --git a/test/adaptive.test.ts b/test/adaptive.test.ts
index d3ef01f..7be27d7 100644
--- a/test/adaptive.test.ts
+++ b/test/adaptive.test.ts
@@ -21,7 +21,7 @@ describe('测试 src/adaptive.ts', () => {
   });
 
   it('适配失败', () => {
-    global.wx = undefined;
+    global.wx = void 0;
 
     expect(adaptive()).toBeUndefined();
   });
diff --git a/test/axios.test.ts b/test/axios.test.ts
index 2c30b1c..7b55b29 100644
--- a/test/axios.test.ts
+++ b/test/axios.test.ts
@@ -2,7 +2,7 @@ import axios from '../src/axios';
 
 describe('测试 src/axios.ts', () => {
   it('default', () => {
-    axios('/test').then(undefined, (error) => {
+    axios('/test').then(void 0, (error) => {
       expect(error.isAxiosError).toBe(true);
       expect(error.message).toBe('平台适配失败，您需要参阅文档使用自定义适配器手动适配当前平台');
     });
diff --git a/test/core/Axios.test.ts b/test/core/Axios.test.ts
index bc8d368..f946462 100644
--- a/test/core/Axios.test.ts
+++ b/test/core/Axios.test.ts
@@ -49,7 +49,7 @@ describe('测试 src/core/Axios.ts', () => {
         method: 'post',
         data: '',
       })
-      .then(undefined, (error) => expect(error.data).toBe('interceptors_response'));
+      .then(void 0, (error) => expect(error.data).toBe('interceptors_response'));
 
     instance.interceptors.request.use((config) => Promise.reject(config));
 
@@ -58,6 +58,6 @@ describe('测试 src/core/Axios.ts', () => {
         method: 'post',
         data: '',
       })
-      .then(undefined, (error) => expect(error.method).toBe('post'));
+      .then(void 0, (error) => expect(error.method).toBe('post'));
   });
 });
diff --git a/test/core/InterceptorManager.test.ts b/test/core/InterceptorManager.test.ts
index e674237..1ef48dc 100644
--- a/test/core/InterceptorManager.test.ts
+++ b/test/core/InterceptorManager.test.ts
@@ -15,8 +15,8 @@ describe('测试 src/core/InterceptorManager.ts', () => {
     const interceptor = new InterceptorManager();
     const executor1 = jest.fn();
     const executor2 = jest.fn();
-    const id1 = interceptor.use(() => undefined);
-    const id2 = interceptor.use(() => undefined);
+    const id1 = interceptor.use(() => void 0);
+    const id2 = interceptor.use(() => void 0);
     interceptor.forEach(executor1);
 
     // executor1 应该被执行了两次
@@ -49,7 +49,7 @@ describe('测试 src/core/InterceptorManager.ts', () => {
     const interceptor = new InterceptorManager();
 
     interceptor.use(
-      () => undefined,
+      () => void 0,
       (error: any) => {
         expect(error).toBe('error');
         return Promise.reject(error);
diff --git a/test/core/dispatchRequest.test.ts b/test/core/dispatchRequest.test.ts
index a72efa5..7cfe16f 100644
--- a/test/core/dispatchRequest.test.ts
+++ b/test/core/dispatchRequest.test.ts
@@ -5,7 +5,7 @@ import isCancel from '../../src/cancel/isCancel';
 
 describe('测试 src/core/dispatchRequest.ts', () => {
   it('默认', () => {
-    dispatchRequest({}).then(undefined, (err) => {
+    dispatchRequest({}).then(void 0, (err) => {
       expect(err.message).toBe('平台适配失败，您需要参阅文档使用自定义适配器手动适配当前平台');
     });
   });
@@ -20,7 +20,7 @@ describe('测试 src/core/dispatchRequest.ts', () => {
       validateStatus(status) {
         return status === -1;
       },
-    }).then(undefined, (err) => expect(err.response.status).toBe(200));
+    }).then(void 0, (err) => expect(err.response.status).toBe(200));
   });
 
   it('自定义错误处理', () => {
@@ -34,7 +34,7 @@ describe('测试 src/core/dispatchRequest.ts', () => {
         error.errorHandler = true;
         return error;
       },
-    }).then(undefined, (error) => expect(error.errorHandler).toBe(true));
+    }).then(void 0, (error) => expect(error.errorHandler).toBe(true));
   });
 
   it('取消请求', () => {
@@ -50,6 +50,6 @@ describe('测试 src/core/dispatchRequest.ts', () => {
       cancelToken: new CancelToken(function executor(c) {
         cancel = c;
       }),
-    }).then(undefined, (err) => expect(isCancel(err)).toBe(true));
+    }).then(void 0, (err) => expect(isCancel(err)).toBe(true));
   });
 });
diff --git a/test/core/mergeConfig.test.ts b/test/core/mergeConfig.test.ts
index 0ce1b3c..67071f3 100644
--- a/test/core/mergeConfig.test.ts
+++ b/test/core/mergeConfig.test.ts
@@ -8,7 +8,7 @@ describe('测试 src/core/mergeConfig.ts', () => {
 
     expect(mergeConfig({ baseURL: 'https://www.xxx.com' })).toEqual({ baseURL: 'https://www.xxx.com' });
 
-    expect(mergeConfig(undefined, { baseURL: 'https://www.xxx.com' })).toEqual({ baseURL: 'https://www.xxx.com' });
+    expect(mergeConfig(void 0, { baseURL: 'https://www.xxx.com' })).toEqual({ baseURL: 'https://www.xxx.com' });
   });
 
   it('只取 config2', () => {
diff --git a/test/core/request.test.ts b/test/core/request.test.ts
index 8dff227..87ad884 100644
--- a/test/core/request.test.ts
+++ b/test/core/request.test.ts
@@ -4,7 +4,7 @@ import isCancel from '../../src/cancel/isCancel';
 
 describe('测试 src/core/request.ts', () => {
   it('默认', () => {
-    request({}).then(undefined, (err) =>
+    request({}).then(void 0, (err) =>
       expect(err.message).toBe('平台适配失败，您需要参阅文档使用自定义适配器手动适配当前平台')
     );
   });
@@ -16,7 +16,7 @@ describe('测试 src/core/request.ts', () => {
 
         return 'task';
       },
-    }).then(undefined, (err) => expect(err.message).toBe('配置不正确或者网络异常'));
+    }).then(void 0, (err) => expect(err.message).toBe('配置不正确或者网络异常'));
   });
 
   it('取消请求', () => {
@@ -31,6 +31,6 @@ describe('测试 src/core/request.ts', () => {
       cancelToken: new CancelToken(function executor(c) {
         c();
       }),
-    }).then(undefined, (err) => expect(isCancel(err)).toBe(true));
+    }).then(void 0, (err) => expect(isCancel(err)).toBe(true));
   });
 });
diff --git a/test/core/transformRequest.test.ts b/test/core/transformRequest.test.ts
index 2afa678..c7523f8 100644
--- a/test/core/transformRequest.test.ts
+++ b/test/core/transformRequest.test.ts
@@ -5,16 +5,16 @@ describe('测试 src/core/transformRequest.ts', () => {
     expect(transformRequest({})).toEqual({
       url: '/',
       method: 'GET',
-      headers: undefined,
-      data: undefined,
-      dataType: undefined,
-      enableCache: undefined,
-      enableHttp2: undefined,
-      enableQuic: undefined,
-      header: undefined,
-      responseType: undefined,
-      sslVerify: undefined,
-      timeout: undefined,
+      headers: void 0,
+      data: void 0,
+      dataType: void 0,
+      enableCache: void 0,
+      enableHttp2: void 0,
+      enableQuic: void 0,
+      header: void 0,
+      responseType: void 0,
+      sslVerify: void 0,
+      timeout: void 0,
     });
   });
 
diff --git a/test/core/transformResponse.test.ts b/test/core/transformResponse.test.ts
index e0c784f..13ed1b6 100644
--- a/test/core/transformResponse.test.ts
+++ b/test/core/transformResponse.test.ts
@@ -8,8 +8,8 @@ describe('测试 src/core/transformResponse.ts', () => {
       data: {},
       headers: {},
       config: {},
-      cookies: undefined,
-      profile: undefined,
+      cookies: void 0,
+      profile: void 0,
     });
   });
 
@@ -20,8 +20,8 @@ describe('测试 src/core/transformResponse.ts', () => {
       data: {},
       headers: { status: 'ok' },
       config: {},
-      cookies: undefined,
-      profile: undefined,
+      cookies: void 0,
+      profile: void 0,
     });
   });
   it('statusCode + header', () => {
@@ -31,8 +31,8 @@ describe('测试 src/core/transformResponse.ts', () => {
       data: {},
       headers: { status: 'ok' },
       config: {},
-      cookies: undefined,
-      profile: undefined,
+      cookies: void 0,
+      profile: void 0,
     });
   });
 });
diff --git a/test/helpers/buildURL.test.ts b/test/helpers/buildURL.test.ts
index 4c3a709..8cbb271 100644
--- a/test/helpers/buildURL.test.ts
+++ b/test/helpers/buildURL.test.ts
@@ -74,7 +74,7 @@ describe('测试 src/helpers/buildURL.ts', () => {
     expect(
       buildURL('/test', {
         null: null,
-        undefined: undefined,
+        undefined: void 0,
         NaN: NaN,
       })
     ).toBe('/test');