diff --git a/packages/vant-cli/changelog.md b/packages/vant-cli/changelog.md
index 50728632b..15a57fc4e 100644
--- a/packages/vant-cli/changelog.md
+++ b/packages/vant-cli/changelog.md
@@ -1,5 +1,11 @@
 # 更新日志
 
+## v2.6.2
+
+`2020-11-15`
+
+- 支持自定义 postcss 配置时传入数组格式的 plugins
+
 ### v2.6.1
 
 `2020-10-09`
diff --git a/packages/vant-cli/src/common/index.ts b/packages/vant-cli/src/common/index.ts
index a723f7f93..0feb4efaa 100644
--- a/packages/vant-cli/src/common/index.ts
+++ b/packages/vant-cli/src/common/index.ts
@@ -7,12 +7,7 @@ import {
   outputFileSync,
 } from 'fs-extra';
 import { merge } from 'webpack-merge';
-import {
-  SRC_DIR,
-  getVantConfig,
-  ROOT_WEBPACK_CONFIG_FILE,
-  ROOT_POSTCSS_CONFIG_FILE,
-} from './constant';
+import { SRC_DIR, getVantConfig, ROOT_WEBPACK_CONFIG_FILE } from './constant';
 import { WebpackConfig } from './types';
 
 export const EXT_REGEXP = /\.\w+$/;
@@ -118,14 +113,6 @@ export function getWebpackConfig(defaultConfig: WebpackConfig): WebpackConfig {
   return defaultConfig;
 }
 
-export function getPostcssConfig() {
-  if (existsSync(ROOT_POSTCSS_CONFIG_FILE)) {
-    return require(ROOT_POSTCSS_CONFIG_FILE);
-  }
-
-  return {};
-}
-
 export type ModuleEnv = 'esmodule' | 'commonjs';
 export type NodeEnv = 'production' | 'development' | 'test';
 export type BuildTarget = 'site' | 'package';
diff --git a/packages/vant-cli/src/config/postcss.config.ts b/packages/vant-cli/src/config/postcss.config.ts
index 51fbb6c5e..e171a429d 100644
--- a/packages/vant-cli/src/config/postcss.config.ts
+++ b/packages/vant-cli/src/config/postcss.config.ts
@@ -1,26 +1,36 @@
-import { getPostcssConfig } from '../common';
+import { existsSync } from 'fs-extra';
+import { ROOT_POSTCSS_CONFIG_FILE } from '../common/constant';
 
-type PostcssConfig = object & {
-  plugins?: object;
+type PostcssConfig = {
+  plugins?: Record<string, unknown> | unknown[];
 };
 
-function mergePostcssConfig(config1: PostcssConfig, config2: PostcssConfig) {
-  const plugins = {
-    ...config1.plugins,
-    ...config2.plugins,
-  };
+export function getRootPostcssConfig(): PostcssConfig {
+  if (existsSync(ROOT_POSTCSS_CONFIG_FILE)) {
+    return require(ROOT_POSTCSS_CONFIG_FILE);
+  }
+  return { plugins: [] };
+}
+
+function getPostcssPlugins(rootConfig: PostcssConfig) {
+  const plugins = rootConfig.plugins || [];
+
+  if (Array.isArray(plugins)) {
+    return [require('autoprefixer'), ...plugins];
+  }
 
   return {
-    ...config1,
-    ...config2,
-    plugins,
+    autoprefixer: {},
+    ...plugins,
   };
 }
 
-const DEFAULT_CONFIG = {
-  plugins: {
-    autoprefixer: {},
-  },
-};
+function resolvePostcssConfig() {
+  const rootConfig = getRootPostcssConfig();
+  return {
+    ...rootConfig,
+    plugins: getPostcssPlugins(rootConfig),
+  };
+}
 
-module.exports = mergePostcssConfig(DEFAULT_CONFIG, getPostcssConfig());
+module.exports = resolvePostcssConfig();
diff --git a/packages/vant-use/src/useScrollParent/index.ts b/packages/vant-use/src/useScrollParent/index.ts
index 1c546402b..0b5b81ef8 100644
--- a/packages/vant-use/src/useScrollParent/index.ts
+++ b/packages/vant-use/src/useScrollParent/index.ts
@@ -6,32 +6,22 @@ const overflowScrollReg = /scroll|auto/i;
 
 function isElement(node: Element) {
   const ELEMENT_NODE_TYPE = 1;
-  return node.tagName !== 'HTML' && node.nodeType === ELEMENT_NODE_TYPE;
+  return (
+    node.tagName !== 'HTML' &&
+    node.tagName !== 'BODY' &&
+    node.nodeType === ELEMENT_NODE_TYPE
+  );
 }
 
-// http://w3help.org/zh-cn/causes/SD9013
-// http://stackoverflow.com/questions/17016740/onscroll-function-is-not-working-for-chrome
+// https://github.com/youzan/vant/issues/3823
 function getScrollParent(el: Element, root: ScrollElement = window) {
   let node = el;
 
   while (node && node !== root && isElement(node)) {
     const { overflowY } = window.getComputedStyle(node);
-
     if (overflowScrollReg.test(overflowY)) {
-      if (node.tagName !== 'BODY') {
-        return node;
-      }
-
-      // see: https://github.com/youzan/vant/issues/3823
-      const { overflowY: htmlOverflowY } = window.getComputedStyle(
-        node.parentNode as Element
-      );
-
-      if (overflowScrollReg.test(htmlOverflowY)) {
-        return node;
-      }
+      return node;
     }
-
     node = node.parentNode as Element;
   }
 
diff --git a/src/swipe/index.js b/src/swipe/index.js
index 8b27be050..ee58bfbdc 100644
--- a/src/swipe/index.js
+++ b/src/swipe/index.js
@@ -136,7 +136,7 @@ export default createComponent({
         currentPosition = Math.min(currentPosition, -minOffset.value);
       }
 
-      let targetOffset = Math.round(offset - currentPosition);
+      let targetOffset = offset - currentPosition;
       if (!props.loop) {
         targetOffset = range(targetOffset, minOffset.value, 0);
       }
@@ -242,8 +242,8 @@ export default createComponent({
       state.rect = rect;
       state.swiping = true;
       state.active = active;
-      state.width = Math.floor(+props.width || rect.width);
-      state.height = Math.floor(+props.height || rect.height);
+      state.width = +props.width || rect.width;
+      state.height = +props.height || rect.height;
       state.offset = getTargetOffset(active);
       children.forEach((swipe) => {
         swipe.setOffset(0);