diff --git a/docs/site/mobile.js b/docs/site/mobile.js
index ad0bb8c58..166e36204 100644
--- a/docs/site/mobile.js
+++ b/docs/site/mobile.js
@@ -6,11 +6,11 @@ import { camelize } from '../../src/utils/format/string';
 import enUS from '../../src/locale/lang/en-US';
 
 Vue.use(Lazyload, {
-  lazyComponent: true
+  lazyComponent: true,
 });
 
 Locale.add({
-  'en-US': enUS
+  'en-US': enUS,
 });
 
 // flag for vant-weapp demos
@@ -33,7 +33,7 @@ Vue.mixin({
 
     isWeapp() {
       return isWeapp;
-    }
+    },
   },
 
   beforeCreate() {
@@ -49,7 +49,7 @@ Vue.mixin({
 
       Locale.add(locales);
     }
-  }
+  },
 });
 
 // switch lang after routing
@@ -91,7 +91,7 @@ Locale.add({
     advancedUsage: '高级用法',
     loadingStatus: '加载状态',
     usernamePlaceholder: '请输入用户名',
-    passwordPlaceholder: '请输入密码'
+    passwordPlaceholder: '请输入密码',
   },
   'en-US': {
     add: 'Add',
@@ -119,6 +119,6 @@ Locale.add({
     basicUsage: 'Basic Usage',
     advancedUsage: 'Advanced Usage',
     usernamePlaceholder: 'Username',
-    passwordPlaceholder: 'Password'
-  }
+    passwordPlaceholder: 'Password',
+  },
 });
diff --git a/packages/vant-icons/build/build-iconfont.js b/packages/vant-icons/build/build-iconfont.js
index 04d5dad9a..a85368ccd 100644
--- a/packages/vant-icons/build/build-iconfont.js
+++ b/packages/vant-icons/build/build-iconfont.js
@@ -36,13 +36,13 @@ function font() {
         targetPath: '../src/index.less',
         normalize: true,
         firstGlyph: 0xf000,
-        cssClass: fontName // this is a trick to pass fontName to template
+        cssClass: fontName, // this is a trick to pass fontName to template
       })
     )
     .pipe(
       iconfont({
         fontName,
-        formats
+        formats,
       })
     )
     .pipe(dest(srcDir));
diff --git a/packages/vant-icons/build/export.js b/packages/vant-icons/build/export.js
index 85e90a3b8..b73633780 100644
--- a/packages/vant-icons/build/export.js
+++ b/packages/vant-icons/build/export.js
@@ -4,7 +4,8 @@ const shell = require('shelljs');
 
 const svgDir = path.join(__dirname, '../assets/svg');
 const sketch = path.join(__dirname, '../assets/icons.sketch');
-const SKETCH_TOOL_DIR = '/Applications/Sketch.app/Contents/Resources/sketchtool/bin/sketchtool';
+const SKETCH_TOOL_DIR =
+  '/Applications/Sketch.app/Contents/Resources/sketchtool/bin/sketchtool';
 
 fs.removeSync(svgDir);
 
diff --git a/packages/vant-icons/src/config.js b/packages/vant-icons/src/config.js
index 300f58444..a8dea9263 100644
--- a/packages/vant-icons/src/config.js
+++ b/packages/vant-icons/src/config.js
@@ -8,7 +8,7 @@ module.exports = {
     'arrow',
     'arrow-left',
     'arrow-up',
-    'arrow-down'
+    'arrow-down',
   ],
   outline: [
     // has corresponding filled icon
@@ -142,7 +142,7 @@ module.exports = {
     'discount',
     'idcard',
     'replay',
-    'shrink'
+    'shrink',
   ],
   filled: [
     // has corresponding outline icon
@@ -235,6 +235,6 @@ module.exports = {
     'ascending',
     'descending',
     'bars',
-    'wap-nav'
-  ]
+    'wap-nav',
+  ],
 };
diff --git a/packages/vant-markdown-loader/src/card-wrapper.js b/packages/vant-markdown-loader/src/card-wrapper.js
index f1434f80e..6216cdef9 100644
--- a/packages/vant-markdown-loader/src/card-wrapper.js
+++ b/packages/vant-markdown-loader/src/card-wrapper.js
@@ -1,5 +1,8 @@
 module.exports = function cardWrapper(html) {
-  const group = html.replace(/<h3/g, ':::<h3').replace(/<h2/g, ':::<h2').split(':::');
+  const group = html
+    .replace(/<h3/g, ':::<h3')
+    .replace(/<h2/g, ':::<h2')
+    .split(':::');
 
   return group
     .map(fragment => {
diff --git a/packages/vant-markdown-loader/src/index.js b/packages/vant-markdown-loader/src/index.js
index d0090f558..d04430519 100644
--- a/packages/vant-markdown-loader/src/index.js
+++ b/packages/vant-markdown-loader/src/index.js
@@ -47,10 +47,10 @@ export default {
 
 const parser = new MarkdownIt({
   html: true,
-  highlight
+  highlight,
 }).use(markdownItAnchor, {
   level: 2,
-  slugify
+  slugify,
 });
 
 module.exports = function(source) {
@@ -60,7 +60,7 @@ module.exports = function(source) {
   options = {
     wrapper,
     linkOpen: true,
-    ...options
+    ...options,
   };
 
   let fm;
diff --git a/packages/vant-markdown-vetur/src/codegen.ts b/packages/vant-markdown-vetur/src/codegen.ts
index 2ec022e3b..0e09d671a 100644
--- a/packages/vant-markdown-vetur/src/codegen.ts
+++ b/packages/vant-markdown-vetur/src/codegen.ts
@@ -65,7 +65,7 @@ export function codegen(artical: Artical) {
       const key = camelCaseToKebabCase(match[1] || 'default');
       const tag: Tag = tags[key] || {
         description: tagDescription,
-        attributes: {}
+        attributes: {},
       };
 
       tags[key] = tag;
@@ -77,7 +77,7 @@ export function codegen(artical: Artical) {
 
         const attr: Attribute = {
           description: getDescription(td, isProp),
-          type: isProp ? td[2].replace(/`/g, '').toLowerCase() : 'event'
+          type: isProp ? td[2].replace(/`/g, '').toLowerCase() : 'event',
         };
 
         tag.attributes[name] = attr;
diff --git a/packages/vant-markdown-vetur/src/index.ts b/packages/vant-markdown-vetur/src/index.ts
index 8cec37615..7442fea85 100644
--- a/packages/vant-markdown-vetur/src/index.ts
+++ b/packages/vant-markdown-vetur/src/index.ts
@@ -8,7 +8,7 @@ import {
   existsSync,
   readdirSync,
   readFileSync,
-  writeFileSync
+  writeFileSync,
 } from 'fs';
 
 export function parseText(input: string) {
@@ -43,18 +43,18 @@ export type ParseResult = {
 
 const defaultOptions = {
   maxDeep: Infinity,
-  tagPrefix: ''
+  tagPrefix: '',
 };
 
 export function parse(options: Options) {
   options = {
     ...defaultOptions,
-    ...options
+    ...options,
   };
 
   const result: ParseResult = {
     tags: {},
-    attributes: {}
+    attributes: {},
   };
 
   function putResult(componentName: string, component: Tag) {
@@ -62,7 +62,7 @@ export function parse(options: Options) {
     const attributes = Object.keys(component.attributes);
     const tag = {
       description: component.description,
-      attributes
+      attributes,
     };
 
     result.tags[componentName] = tag;
@@ -85,7 +85,7 @@ export function parse(options: Options) {
         recursiveParse(
           {
             ...options,
-            path: currentPath
+            path: currentPath,
           },
           deep
         );
@@ -123,7 +123,10 @@ export function parseAndWrite(options: Options) {
     mkdirSync(options.outputDir);
   }
 
-  writeFileSync(join(options.outputDir, 'tags.json'), JSON.stringify(tags, null, 2));
+  writeFileSync(
+    join(options.outputDir, 'tags.json'),
+    JSON.stringify(tags, null, 2)
+  );
   writeFileSync(
     join(options.outputDir, 'attributes.json'),
     JSON.stringify(attributes, null, 2)
@@ -133,5 +136,5 @@ export function parseAndWrite(options: Options) {
 export default {
   parse,
   parseText,
-  parseAndWrite
+  parseAndWrite,
 };
diff --git a/packages/vant-markdown-vetur/src/md-parser.ts b/packages/vant-markdown-vetur/src/md-parser.ts
index dc23c79f0..673e1a560 100644
--- a/packages/vant-markdown-vetur/src/md-parser.ts
+++ b/packages/vant-markdown-vetur/src/md-parser.ts
@@ -43,7 +43,7 @@ function tableParse(input: string) {
   const end = input.length;
   const table: TableContent = {
     head: [],
-    body: []
+    body: [],
   };
 
   while (start < end) {
@@ -69,7 +69,7 @@ function tableParse(input: string) {
 
   return {
     table,
-    usedLength: start
+    usedLength: start,
   };
 }
 
@@ -86,7 +86,7 @@ export function mdParser(input: string): Array<SimpleMdAst> {
       artical.push({
         type: 'title',
         content: match[2],
-        level: match[1].length
+        level: match[1].length,
       });
 
       start += match.index + match[0].length;
@@ -94,7 +94,7 @@ export function mdParser(input: string): Array<SimpleMdAst> {
       const { table, usedLength } = tableParse(target.substr(match.index));
       artical.push({
         type: 'table',
-        table
+        table,
       });
 
       start += match.index + usedLength;
diff --git a/packages/vant-stylelint-config/index.js b/packages/vant-stylelint-config/index.js
index d7955a711..0a8e205a8 100644
--- a/packages/vant-stylelint-config/index.js
+++ b/packages/vant-stylelint-config/index.js
@@ -6,6 +6,6 @@ module.exports = {
     'number-leading-zero': null,
     'no-descending-specificity': null,
     'declaration-colon-newline-after': null,
-    'font-family-no-missing-generic-family-keyword': null
-  }
+    'font-family-no-missing-generic-family-keyword': null,
+  },
 };
diff --git a/packages/vant-touch-emulator/index.js b/packages/vant-touch-emulator/index.js
index 92674603c..dfa3607b7 100644
--- a/packages/vant-touch-emulator/index.js
+++ b/packages/vant-touch-emulator/index.js
@@ -9,16 +9,30 @@ var supportTouch = 'ontouchstart' in window;
 
 // polyfills
 if (!document.createTouch) {
-  document.createTouch = function(view, target, identifier, pageX, pageY, screenX, screenY) {
+  document.createTouch = function(
+    view,
+    target,
+    identifier,
+    pageX,
+    pageY,
+    screenX,
+    screenY
+  ) {
     // auto set
-    return new Touch(target, identifier, {
-      pageX: pageX,
-      pageY: pageY,
-      screenX: screenX,
-      screenY: screenY,
-      clientX: pageX - window.pageXOffset,
-      clientY: pageY - window.pageYOffset
-    }, 0, 0);
+    return new Touch(
+      target,
+      identifier,
+      {
+        pageX: pageX,
+        pageY: pageY,
+        screenX: screenX,
+        screenY: screenY,
+        clientX: pageX - window.pageXOffset,
+        clientY: pageY - window.pageYOffset,
+      },
+      0,
+      0
+    );
   };
 }
 
@@ -78,15 +92,12 @@ function TouchList() {
   return touchList;
 }
 
-
-
 /**
  * only trigger touches when the left mousebutton has been pressed
  * @param touchType
  * @returns {Function}
  */
 
- 
 var initiated = false;
 function onMouse(touchType) {
   return function(ev) {
@@ -101,13 +112,17 @@ function onMouse(touchType) {
     }
 
     if (ev.type === 'mousemove' && !initiated) {
-      return
+      return;
     }
 
     // The EventTarget on which the touch point started when it was first placed on the surface,
     // even if the touch point has since moved outside the interactive area of that element.
     // also, when the target doesnt exist anymore, we update it
-    if (ev.type === 'mousedown' || !eventTarget || eventTarget && !eventTarget.dispatchEvent) {
+    if (
+      ev.type === 'mousedown' ||
+      !eventTarget ||
+      (eventTarget && !eventTarget.dispatchEvent)
+    ) {
       eventTarget = ev.target;
     }
 
diff --git a/packages/vant-waterfall/src/directive.js b/packages/vant-waterfall/src/directive.js
index 1666e66f2..2bd668d93 100644
--- a/packages/vant-waterfall/src/directive.js
+++ b/packages/vant-waterfall/src/directive.js
@@ -3,7 +3,7 @@ import {
   getScrollTop,
   getElementTop,
   getVisibleHeight,
-  getScrollEventTarget
+  getScrollEventTarget,
 } from './scroll';
 
 const CONTEXT = '@@Waterfall';
@@ -27,14 +27,18 @@ function handleScrollEvent() {
   // 判断是否到了底
   let needLoadMoreToLower = false;
   if (element === scrollEventTarget) {
-    needLoadMoreToLower = scrollEventTarget.scrollHeight - targetBottom < this.offset;
+    needLoadMoreToLower =
+      scrollEventTarget.scrollHeight - targetBottom < this.offset;
   } else {
     const elementBottom =
-      getElementTop(element) - getElementTop(scrollEventTarget) + getVisibleHeight(element);
+      getElementTop(element) -
+      getElementTop(scrollEventTarget) +
+      getVisibleHeight(element);
     needLoadMoreToLower = elementBottom - targetVisibleHeight < this.offset;
   }
   if (needLoadMoreToLower) {
-    this.cb.lower && this.cb.lower({ target: scrollEventTarget, top: targetScrollTop });
+    this.cb.lower &&
+      this.cb.lower({ target: scrollEventTarget, top: targetScrollTop });
   }
 
   // 判断是否到了顶
@@ -42,11 +46,13 @@ function handleScrollEvent() {
   if (element === scrollEventTarget) {
     needLoadMoreToUpper = targetScrollTop < this.offset;
   } else {
-    const elementTop = getElementTop(element) - getElementTop(scrollEventTarget);
+    const elementTop =
+      getElementTop(element) - getElementTop(scrollEventTarget);
     needLoadMoreToUpper = elementTop + this.offset > 0;
   }
   if (needLoadMoreToUpper) {
-    this.cb.upper && this.cb.upper({ target: scrollEventTarget, top: targetScrollTop });
+    this.cb.upper &&
+      this.cb.upper({ target: scrollEventTarget, top: targetScrollTop });
   }
 }
 
@@ -103,14 +109,14 @@ function doCheckStartBind(el) {
   }
 }
 
-export default function (type) {
+export default function(type) {
   return {
     bind(el, binding, vnode) {
       if (!el[CONTEXT]) {
         el[CONTEXT] = {
           el,
           vm: vnode.context,
-          cb: {}
+          cb: {},
         };
       }
       el[CONTEXT].cb[type] = binding.value;
@@ -128,6 +134,6 @@ export default function (type) {
       if (context.scrollEventTarget) {
         off(context.scrollEventTarget, 'scroll', context.scrollEventListener);
       }
-    }
+    },
   };
 }
diff --git a/packages/vant-waterfall/src/event.js b/packages/vant-waterfall/src/event.js
index 0713d59ba..1d3b2ea62 100644
--- a/packages/vant-waterfall/src/event.js
+++ b/packages/vant-waterfall/src/event.js
@@ -8,10 +8,10 @@ try {
     get() {
       /* istanbul ignore next */
       supportsPassive = true;
-    }
+    },
   });
   window.addEventListener('test-passive', null, opts);
-// eslint-disable-next-line no-empty
+  // eslint-disable-next-line no-empty
 } catch (e) {}
 
 export function on(target, event, handler, passive = false) {
diff --git a/packages/vant-waterfall/src/index.js b/packages/vant-waterfall/src/index.js
index 612f87b27..7eaa335fc 100644
--- a/packages/vant-waterfall/src/index.js
+++ b/packages/vant-waterfall/src/index.js
@@ -1,6 +1,6 @@
 import Waterfall from './directive';
 
-Waterfall.install = function (Vue) {
+Waterfall.install = function(Vue) {
   Vue.directive('WaterfallLower', Waterfall('lower'));
   Vue.directive('WaterfallUpper', Waterfall('upper'));
 };
diff --git a/types/image-preview.d.ts b/types/image-preview.d.ts
index c282634f1..c3b653f0d 100644
--- a/types/image-preview.d.ts
+++ b/types/image-preview.d.ts
@@ -1,21 +1,23 @@
 import { VanPopupMixin } from './mixins/popup';
 
-export type ImagePreviewOptions = string[] | {
-  loop?: boolean;
-  images: string[];
-  maxZoom?: number;
-  minZoom?: number;
-  className?: any;
-  lazyLoad?: boolean;
-  showIndex?: boolean;
-  asyncClose?: boolean;
-  swipeDuration?: number;
-  startPosition?: number;
-  showIndicators?: boolean;
-  closeOnPopstate?: boolean;
-  onClose?: () => void;
-  onChange?: (index: number) => void;
-};
+export type ImagePreviewOptions =
+  | string[]
+  | {
+      loop?: boolean;
+      images: string[];
+      maxZoom?: number;
+      minZoom?: number;
+      className?: any;
+      lazyLoad?: boolean;
+      showIndex?: boolean;
+      asyncClose?: boolean;
+      swipeDuration?: number;
+      startPosition?: number;
+      showIndicators?: boolean;
+      closeOnPopstate?: boolean;
+      onClose?: () => void;
+      onChange?: (index: number) => void;
+    };
 
 export class VanImagePreview extends VanPopupMixin {
   images: string[];
diff --git a/types/index.d.ts b/types/index.d.ts
index d9803647f..3f1971218 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -110,5 +110,5 @@ export {
   SwipeCell,
   Tabs,
   Toast,
-  Uploader
+  Uploader,
 };
diff --git a/types/lazyload.d.ts b/types/lazyload.d.ts
index 11baba3e8..470fbbfdf 100644
--- a/types/lazyload.d.ts
+++ b/types/lazyload.d.ts
@@ -1,7 +1,7 @@
-import Vue, { PluginFunction } from 'vue';
+import { PluginFunction } from 'vue';
 
 export interface Lazyload {
-  install: PluginFunction<void>
+  install: PluginFunction<void>;
 }
 
 export const Lazyload: Lazyload;
diff --git a/types/toast.d.ts b/types/toast.d.ts
index 24c3761bb..b8f3f26c7 100644
--- a/types/toast.d.ts
+++ b/types/toast.d.ts
@@ -41,7 +41,10 @@ export interface Toast {
   fail(options?: ToastOptions | ToastMessage): VanToast;
   clear(all?: boolean): void;
   install(): void;
-  setDefaultOptions(type: ToastType | ToastOptions, options?: ToastOptions): void;
+  setDefaultOptions(
+    type: ToastType | ToastOptions,
+    options?: ToastOptions
+  ): void;
   resetDefaultOptions(options?: string): void;
   allowMultiple(allow: boolean): void;
 }