diff --git a/docs/.vitepress/config.ts b/docs/.vitepress/config.ts
index a478c8b..09e1855 100644
--- a/docs/.vitepress/config.ts
+++ b/docs/.vitepress/config.ts
@@ -106,6 +106,7 @@ function sidebar() {
         { text: 'TRACE', link: '/method/TRACE' },
         { text: 'CONNECT', link: '/method/CONNECT' },
       ],
+      collapsed: false,
     },
     {
       text: '基础',
@@ -118,6 +119,7 @@ function sidebar() {
         { text: '错误处理', link: '/basics/error-handler' },
         { text: '取消请求', link: '/basics/cancel' },
       ],
+      collapsed: false,
     },
     {
       text: '高级',
@@ -128,6 +130,7 @@ function sidebar() {
         { text: '派生领域', link: '/advanced/fork' },
         { text: '适配器', link: '/advanced/adapter' },
       ],
+      collapsed: false,
     },
 
     {
diff --git a/docs/.vitepress/theme/styles/cover.css b/docs/.vitepress/theme/styles/cover.css
index d3f6c58..c95bcb6 100644
--- a/docs/.vitepress/theme/styles/cover.css
+++ b/docs/.vitepress/theme/styles/cover.css
@@ -30,8 +30,8 @@
   background-color: var(--vp-nav-bg-color);
 }
 
-.VPSidebar .nav {
-  overflow-x: hidden;
+.VPSidebar .group {
+  width: 100%;
 }
 
 .VPSidebarItem.level-0 .text {
@@ -57,7 +57,7 @@
   width: 4px;
   height: 4px;
   border-radius: 2px;
-  background-color: #07c160;
+  background-color: var(--vp-c-brand);
   position: absolute;
   top: 15px;
   left: 2px;
@@ -73,6 +73,12 @@
   overflow: auto;
 }
 
+.VPMenu {
+  border: 1px solid var(--vp-c-gutter) !important;
+  border-radius: 6px !important;
+  box-shadow: none !important;
+}
+
 .VPHero .tagline {
   font-weight: normal;
 }
@@ -110,7 +116,8 @@
 
 .language-bash,
 .language-ts {
-  border: 1px solid var(--vp-c-gutter);
+  border-radius: none;
+  border: none;
 }
 
 .vp-code-group .tabs {
@@ -135,6 +142,10 @@
   box-shadow: none;
 }
 
+.custom-block {
+  border-radius: 6px;
+}
+
 .dark .DocSearch-Modal {
   --docsearch-modal-background: var(--vp-c-bg-soft);
 }
@@ -159,4 +170,10 @@
   .VPFeatures .item {
     width: 100%;
   }
+
+  .language-bash,
+  .language-ts {
+    border-radius: 6px;
+    border: 1px solid var(--vp-c-gutter);
+  }
 }
diff --git a/docs/pages/basics/cancel.md b/docs/pages/basics/cancel.md
index 21543d7..1fdf5d2 100644
--- a/docs/pages/basics/cancel.md
+++ b/docs/pages/basics/cancel.md
@@ -16,13 +16,12 @@ title: 取消请求
 import axios from 'axios-miniprogram';
 let cancel;
 
-axios
-  .get('/test', {
-    cancelToken: new axios.CancelToken((c) => {
-      // executor 函数接收一个 cancel 函数作为参数
-      cancel = c;
-    }),
-  })
+axios('https://api.com/test', {
+  cancelToken: new axios.CancelToken((c) => {
+    // executor 函数接收一个 cancel 函数作为参数
+    cancel = c;
+  }),
+})
   .then((response) => {
     // 成功之后做些什么
   })
@@ -42,10 +41,9 @@ cancel('request canceled');
 import axios from 'axios-miniprogram';
 const { cancel, token } = axios.CancelToken.source();
 
-axios
-  .get('https://api.com/test', {
-    cancelToken: token,
-  })
+axios('https://api.com/test', {
+  cancelToken: token,
+})
   .then((response) => {
     // 成功之后做些什么
   })
@@ -65,10 +63,9 @@ cancel('request canceled');
 import axios from 'axios-miniprogram';
 const { cancel, token } = axios.CancelToken.source();
 
-axios
-  .get('https://api.com/test', {
-    cancelToken: token,
-  })
+axios('https://api.com/test', {
+  cancelToken: token,
+})
   .then((response) => {
     // 成功之后做些什么
   })
diff --git a/docs/pages/basics/config.md b/docs/pages/basics/config.md
index 05db93d..19c354d 100644
--- a/docs/pages/basics/config.md
+++ b/docs/pages/basics/config.md
@@ -85,7 +85,7 @@ axios({
     console.log(status);
   },
 
-  // 异常处理
+  // 错误处理
   errorHandler(error) {
     console.log(error);
   },
@@ -112,29 +112,28 @@ axios({
 ```ts
 import axios from 'axios-miniprogram';
 
-axios
-  .request({
-    // 开启 http2
-    enableHttp2: false,
+axios({
+  // 开启 http2
+  enableHttp2: false,
 
-    // 开启 quic
-    enableQuic: false,
+  // 开启 quic
+  enableQuic: false,
 
-    // 开启 cache
-    enableCache: false,
+  // 开启 cache
+  enableCache: false,
 
-    // 是否开启 HttpDNS 服务。如开启，需要同时填入 httpDNSServiceId 。
-    enableHttpDNS: false,
+  // 是否开启 HttpDNS 服务。如开启，需要同时填入 httpDNSServiceId 。
+  enableHttpDNS: false,
 
-    // HttpDNS 服务商 Id。
-    httpDNSServiceId: '123',
+  // HttpDNS 服务商 Id。
+  httpDNSServiceId: '123',
 
-    // 开启 transfer-encoding chunked。
-    enableChunked: false,
+  // 开启 transfer-encoding chunked。
+  enableChunked: false,
 
-    // wifi 下使用移动网络发送请求
-    forceCellularNetwork: false,
-  })
+  // wifi 下使用移动网络发送请求
+  forceCellularNetwork: false,
+})
   .then((response) => {
     // 成功之后做些什么
   })
@@ -154,14 +153,13 @@ axios
 ```ts
 import axios from 'axios-miniprogram';
 
-axios
-  .request({
-    // 这是一个自定义配置
-    user: '123',
+axios({
+  // 这是一个自定义配置
+  user: '123',
 
-    // 这也是一个自定义配置
-    showLoading: true,
-  })
+  // 这也是一个自定义配置
+  showLoading: true,
+})
   .then((response) => {
     // 成功之后做些什么
   })
diff --git a/docs/pages/basics/error-handler.md b/docs/pages/basics/error-handler.md
index db04d45..258484d 100644
--- a/docs/pages/basics/error-handler.md
+++ b/docs/pages/basics/error-handler.md
@@ -4,4 +4,115 @@ title: 错误处理
 
 # {{ $frontmatter.title }}
 
-待续...
+::: tip {{ $frontmatter.title }}
+当请求失败时，可以对错误进行处理。
+:::
+
+## 使用 `validateStatus` 抛出错误
+
+可以使用 `validateStatus` 自定义抛出错误的 HTTP code。
+
+```ts
+import axios from 'axios-miniprogram';
+
+axios('https://api.com/test', {
+  validateStatus(status) {
+    // status 小于 200 大于 299 会抛出错误
+    return status >= 200 && status < 300;
+  },
+})
+  .then((response) => {
+    // 成功之后做些什么
+  })
+  .catch((error) => {
+    // 失败之后做些什么
+  });
+```
+
+## 在 `catch` 中处理错误
+
+可以处理不同类型的错误。
+
+```ts
+import axios from 'axios-miniprogram';
+
+axios('https://api.com/test')
+  .then((response) => {
+    // 成功之后做些什么
+  })
+  .catch((error) => {
+    if (axios.isAxiosError(error)) {
+      // 响应错误
+
+      const {
+        // 错误消息
+        message,
+
+        // 请求配置
+        config,
+
+        // 请求任务，也就是请求函数返回的结果
+        request,
+
+        // 响应体
+        response,
+      } = error;
+
+      if (response.isFail) {
+        // 平台或适配器错误
+      } else {
+        // 使用 `validateStatus` 自定义抛出的错误
+      }
+    } else if (axios.isCancel(error)) {
+      // 取消请求
+    } else {
+      // 其他错误
+    }
+  });
+```
+
+## 使用 `errorHandler` 处理错误。
+
+可以使用 `errorHandler` 处理不同类型的错误。
+
+```ts
+import axios from 'axios-miniprogram';
+
+axios('https://api.com/test', {
+  errorHandler(error) {
+    if (axios.isAxiosError(error)) {
+      // 响应错误
+
+      const {
+        // 错误消息
+        message,
+
+        // 请求配置
+        config,
+
+        // 请求任务，也就是请求函数返回的结果
+        request,
+
+        // 响应体
+        response,
+      } = error;
+
+      if (response.isFail) {
+        // 平台或适配器错误
+      } else {
+        // 使用 `validateStatus` 自定义抛出的错误
+      }
+    } else if (axios.isCancel(error)) {
+      // 取消请求
+    } else {
+      // 其他错误
+    }
+  },
+})
+  .then((response) => {
+    // 成功之后做些什么
+  })
+  .catch((error) => {
+    // 失败之后做些什么
+  });
+```
diff --git a/src/adapter.ts b/src/adapter.ts
index 427b814..c48ea78 100644
--- a/src/adapter.ts
+++ b/src/adapter.ts
@@ -314,7 +314,7 @@ export function createAdapter(platform: AxiosPlatform) {
    */
   function cleanResponse(response: AnyObject, keys: string[]) {
     for (const key of keys) {
-      if (key in response) delete response[key];
+      delete response[key];
     }
   }
 
diff --git a/src/core/Axios.ts b/src/core/Axios.ts
index 0f868c3..5c5c81e 100644
--- a/src/core/Axios.ts
+++ b/src/core/Axios.ts
@@ -156,7 +156,7 @@ export interface AxiosRequestConfig
    */
   transformResponse?: AxiosTransformer<AxiosResponseData>;
   /**
-   * 异常处理
+   * 错误处理
    */
   errorHandler?: (error: unknown) => Promise<void> | void;
   /**
diff --git a/src/core/dispatchRequest.ts b/src/core/dispatchRequest.ts
index 7d571c4..c9ec874 100644
--- a/src/core/dispatchRequest.ts
+++ b/src/core/dispatchRequest.ts
@@ -1,9 +1,9 @@
-import { isFunction, isString } from '../helpers/isTypes';
+import { isFunction, isPromise, isString } from '../helpers/isTypes';
 import { assert } from '../helpers/error';
 import { Cancel, isCancel, isCancelToken } from './cancel';
 import { flattenHeaders } from './flattenHeaders';
 import { AxiosTransformer, transformData } from './transformData';
-import { request } from './request';
+import { request, withDataRE } from './request';
 import { AxiosRequestConfig, AxiosResponse } from './Axios';
 import { transformURL } from './transformURL';
 import { AxiosErrorResponse } from './createError';
@@ -27,7 +27,9 @@ export function dispatchRequest(config: AxiosRequestConfig) {
   config.url = transformURL(config);
   config.headers = flattenHeaders(config);
 
-  transformer(config, transformRequest);
+  if (withDataRE.test(config.method!)) {
+    transformer(config, transformRequest);
+  }
 
   function onSuccess(response: AxiosResponse) {
     throwIfCancellationRequested(config);
@@ -43,10 +45,8 @@ export function dispatchRequest(config: AxiosRequestConfig) {
 
     if (isFunction(errorHandler)) {
       const promise = errorHandler(reason);
-      if (promise) {
-        return promise.then(() => {
-          throw reason;
-        });
+      if (isPromise(promise)) {
+        return promise.then(() => Promise.reject(reason));
       }
     }
 
diff --git a/src/core/flattenHeaders.ts b/src/core/flattenHeaders.ts
index 66ae3dd..a480236 100644
--- a/src/core/flattenHeaders.ts
+++ b/src/core/flattenHeaders.ts
@@ -4,9 +4,9 @@ import { AxiosRequestConfig, AxiosRequestHeaders } from './Axios';
 
 export function flattenHeaders(
   config: AxiosRequestConfig,
-): AxiosRequestHeaders | undefined {
+): AxiosRequestHeaders {
   if (!isPlainObject(config.headers)) {
-    return config.headers;
+    return {};
   }
 
   return {
diff --git a/src/core/mergeConfig.ts b/src/core/mergeConfig.ts
index 7958d4f..c5f447c 100644
--- a/src/core/mergeConfig.ts
+++ b/src/core/mergeConfig.ts
@@ -5,13 +5,13 @@ import { AxiosRequestConfig } from './Axios';
 const fromConfig2Map: Record<string, boolean> = {
   url: true,
   method: true,
+  data: true,
   upload: true,
   download: true,
 };
 const deepMergeConfigMap: Record<string, boolean> = {
   headers: true,
   params: true,
-  data: true,
 };
 
 export function mergeConfig(
diff --git a/src/core/request.ts b/src/core/request.ts
index 2ba3893..3cacd8a 100644
--- a/src/core/request.ts
+++ b/src/core/request.ts
@@ -15,6 +15,7 @@ import {
 import { isCancelToken } from './cancel';
 import { AxiosErrorResponse, createError } from './createError';
 import { generateType } from './generateType';
+import AxiosDomain from './AxiosDomain';
 
 function tryToggleProgressUpdate(
   adapterConfig: AxiosAdapterRequestConfig,
@@ -37,10 +38,19 @@ function tryToggleProgressUpdate(
   }
 }
 
+/**
+ * 可以携带 data 的请求方法
+ */
+export const withDataRE = new RegExp(`^${AxiosDomain.asd.join('|')}$`, 'i');
+
 export function request(config: AxiosRequestConfig) {
   return new Promise<AxiosResponse>((resolve, reject) => {
     const { adapter, url, method, cancelToken } = config;
 
+    if (!withDataRE.test(method!)) {
+      delete config.data;
+    }
+
     const adapterConfig: AxiosAdapterRequestConfig = {
       ...config,
       url: url!,
diff --git a/src/helpers/isTypes.ts b/src/helpers/isTypes.ts
index 5c2bf71..28e7743 100644
--- a/src/helpers/isTypes.ts
+++ b/src/helpers/isTypes.ts
@@ -34,3 +34,10 @@ export function isDate(date: any): date is Date {
 export function isFunction<T extends Function>(value: any): value is T {
   return typeof value === 'function';
 }
+
+export function isPromise<T = unknown>(value: any): value is Promise<T> {
+  return (
+    _toString.call(value) === '[object Promise]' ||
+    (isPlainObject(value) && isFunction(value.then))
+  );
+}
diff --git a/test/core/Axios.test.ts b/test/core/Axios.test.ts
index 669d22d..dfe2896 100644
--- a/test/core/Axios.test.ts
+++ b/test/core/Axios.test.ts
@@ -144,18 +144,18 @@ describe('src/core/Axios.ts', () => {
     const axios = new Axios();
 
     const cb1 = vi.fn((v) => {
-      expect(v.data.index).toBe(2);
-      v.data.index = 3;
+      expect(v.params.index).toBe(2);
+      v.params.index = 3;
       return v;
     });
     const cb2 = vi.fn((v) => {
-      expect(v.data.index).toBe(1);
-      v.data.index = 2;
+      expect(v.params.index).toBe(1);
+      v.params.index = 2;
       return v;
     });
     const cb3 = vi.fn((v) => {
-      expect(v.data.index).toBe(0);
-      v.data.index = 1;
+      expect(v.params.index).toBe(0);
+      v.params.index = 1;
       return v;
     });
 
@@ -165,9 +165,9 @@ describe('src/core/Axios.ts', () => {
 
     axios.request('/test', {
       adapter: (config) => {
-        expect(config.data!.index).toBe(3);
+        expect(config.params!.index).toBe(3);
       },
-      data: {
+      params: {
         index: 0,
       },
     });
diff --git a/test/core/dispatchRequest.test.ts b/test/core/dispatchRequest.test.ts
index 676cfd7..499c947 100644
--- a/test/core/dispatchRequest.test.ts
+++ b/test/core/dispatchRequest.test.ts
@@ -5,6 +5,7 @@ import {
   mockAdapterError,
   mockAdapterFail,
 } from 'scripts/test.utils';
+import Axios from '@/core/Axios';
 import { dispatchRequest } from '@/core/dispatchRequest';
 import axios from '@/axios';
 import _defaults from '@/defaults';
@@ -50,8 +51,7 @@ describe('src/core/dispatchRequest.ts', () => {
       {
         "config": {
           "adapter": [Function],
-          "data": undefined,
-          "headers": undefined,
+          "headers": {},
           "method": "get",
           "url": "",
         },
@@ -59,8 +59,7 @@ describe('src/core/dispatchRequest.ts', () => {
         "response": {
           "config": {
             "adapter": [Function],
-            "data": undefined,
-            "headers": undefined,
+            "headers": {},
             "method": "get",
             "url": "",
           },
@@ -136,9 +135,11 @@ describe('src/core/dispatchRequest.ts', () => {
       transformRequest: () => ({ id: 1 }),
     };
 
-    dispatchRequest(c);
-
-    expect(c.data).toEqual({ id: 1 });
+    Axios.asd.forEach((k) => {
+      const s = { ...c, method: k };
+      dispatchRequest(s);
+      expect(s.data).toEqual({ id: 1 });
+    });
   });
 
   test('应该支持转换响应数据', async () => {
@@ -153,24 +154,20 @@ describe('src/core/dispatchRequest.ts', () => {
     expect(r.data).toEqual({ result: 1 });
   });
 
-  test('应该支持自定义异常处理器', async () => {
+  test('应该支持错误处理', async () => {
     const e1 = vi.fn();
     const e2 = vi.fn();
     const c1 = {
       ...defaults,
       adapter: mockAdapterError(),
       url: 'test',
-      errorHandler: async (err: unknown) => {
-        e1(err);
-      },
+      errorHandler: e1,
     };
     const c2 = {
       ...defaults,
       adapter: mockAdapterFail(),
       url: 'test',
-      errorHandler: async (err: unknown) => {
-        e2(err);
-      },
+      errorHandler: e2,
     };
 
     try {
@@ -190,20 +187,24 @@ describe('src/core/dispatchRequest.ts', () => {
     }
   });
 
-  test('应该支持异步的自定义异常处理器', async () => {
+  test('应该支持异步错误处理', async () => {
     const e1 = vi.fn();
     const e2 = vi.fn();
     const c1 = {
       ...defaults,
       adapter: mockAdapterError(),
       url: 'test',
-      errorHandler: e1,
+      errorHandler: async (err: unknown) => {
+        e1(err);
+      },
     };
     const c2 = {
       ...defaults,
       adapter: mockAdapterFail(),
       url: 'test',
-      errorHandler: e2,
+      errorHandler: async (err: unknown) => {
+        e2(err);
+      },
     };
 
     try {
diff --git a/test/core/flattenHeaders.test.ts b/test/core/flattenHeaders.test.ts
index bc7f9df..5757e7b 100644
--- a/test/core/flattenHeaders.test.ts
+++ b/test/core/flattenHeaders.test.ts
@@ -9,7 +9,7 @@ describe('src/core/flattenHeaders.ts', () => {
   ) as unknown as Record<(typeof keys)[number], AnyObject>;
 
   test('应该支持空配置', () => {
-    expect(flattenHeaders({})).toBeUndefined();
+    expect(flattenHeaders({})).toEqual({});
   });
 
   test('应该支持自定义 headers', () => {
diff --git a/test/core/mergeConfig.test.ts b/test/core/mergeConfig.test.ts
index 866c49a..ccf4c8b 100644
--- a/test/core/mergeConfig.test.ts
+++ b/test/core/mergeConfig.test.ts
@@ -18,12 +18,18 @@ describe('src/core/mergeConfig.ts', () => {
     const c1 = {
       url: 'a',
       method: 'get' as const,
+      data: {
+        v1: '1',
+      },
       upload: true,
       download: true,
     };
     const c2 = {
       url: 'b',
       method: 'post' as const,
+      data: {
+        v1: '2',
+      },
       upload: false,
       download: false,
     };
@@ -71,7 +77,6 @@ describe('src/core/mergeConfig.ts', () => {
         v1: 1,
       },
       params: o1,
-      data: o1,
     };
     const c2 = {
       headers: {
@@ -81,7 +86,6 @@ describe('src/core/mergeConfig.ts', () => {
         v2: 2,
       },
       params: o2,
-      data: o2,
     };
     const mc = {
       headers: {
@@ -93,7 +97,6 @@ describe('src/core/mergeConfig.ts', () => {
         v2: 2,
       },
       params: o3,
-      data: o3,
     };
 
     expect(mergeConfig(c1, {})).toEqual(c1);
@@ -117,12 +120,10 @@ describe('src/core/mergeConfig.ts', () => {
     const c1 = {
       headers: 1,
       params: '1',
-      data: [],
     };
     const c2 = {
       headers: () => null,
       params: null,
-      data: new Date(),
     };
 
     expect(mergeConfig(c1 as any, c2 as any)).toEqual({});
diff --git a/test/core/request.test.ts b/test/core/request.test.ts
index 42a4fe6..4dbebef 100644
--- a/test/core/request.test.ts
+++ b/test/core/request.test.ts
@@ -174,6 +174,20 @@ describe('src/core/request.ts', () => {
     expect(axios.isCancel(cb.mock.calls[0][0])).toBeTruthy();
   });
 
+  test('应该删除请求数据', () => {
+    const c = {
+      adapter: mockAdapter(),
+      url: 'test',
+      data: {},
+    };
+
+    [...Axios.as, ...Axios.asp].forEach((k) => {
+      const s = { ...c, method: k };
+      request(s);
+      expect(s.data).toBeUndefined();
+    });
+  });
+
   test('应该发送不同类型的请求', () => {
     request({
       adapter: ({ type }) => {
diff --git a/test/helpers/isTypes.test.ts b/test/helpers/isTypes.test.ts
index f8a10bb..3181d4f 100644
--- a/test/helpers/isTypes.test.ts
+++ b/test/helpers/isTypes.test.ts
@@ -8,6 +8,7 @@ import {
   isNull,
   isUndefined,
   isString,
+  isPromise,
 } from '@/helpers/isTypes';
 
 describe('src/helpers/isTypes.ts', () => {
@@ -60,4 +61,23 @@ describe('src/helpers/isTypes.ts', () => {
     expect(isString('')).toBeTruthy();
     expect(isString(``)).toBeTruthy();
   });
+
+  test('应该能判断是 Promise', () => {
+    expect(isPromise({})).toBeFalsy();
+    expect(isPromise(Promise.resolve())).toBeTruthy();
+    expect(
+      isPromise(
+        new Promise(function () {
+          return;
+        }),
+      ),
+    ).toBeTruthy();
+    expect(
+      isPromise({
+        then() {
+          return;
+        },
+      }),
+    ).toBeTruthy();
+  });
 });