[bugfix] Popup overlayClass type (#374)

docs/markdown/en-US/popup.md

@@ -44,7 +44,7 @@ Use `position` prop to set popup display position
 | lockOnScroll | Lock body scroll | `Boolean` | `false` | - |
 | position | Position | `String` | - | `top` `bottom` `right` `left` |
 | overlayClass | Custom overlay class | `String` | `` | - |
-| overlayStyle | Custom overlay style | `Object` | `` | - |
+| overlayStyle | Custom overlay style | `Object` | - | - |
 | closeOnClickOverlay | Close popup when click overlay | `Boolean` | `true` | - |
 | transition | Transition | `String` | `popup-slide` | - |
 | preventScroll | Prevent background scroll | `Boolean` | `false` | - |

docs/src/components/DemoList.vue

@@ -58,7 +58,7 @@ export default {
 </script>
 
 <style lang="postcss">
-@import '../../../packages/vant-css/src/common/var';
+@import '../../../packages/vant-css/src/common/var.css';
 
 .side-nav {
   width: 100%;

packages/mixins/popup/index.js

@@ -3,41 +3,24 @@ import context from './popup-context';
 
 export default {
   props: {
-    // popup 当前显示状态
-    value: {
-      type: Boolean,
-      default: false
-    },
-    // 是否显示遮罩层
-    overlay: {
-      type: Boolean,
-      default: false
-    },
-    // 点击遮罩层是否关闭 popup
-    closeOnClickOverlay: {
-      type: Boolean,
-      default: false
-    },
+    // whether to show popup
+    value: Boolean,
+    // whether to show overlay
+    overlay: Boolean,
+    // overlay custom style
+    overlayStyle: Object,
+    // overlay custom class name
+    overlayClass: String,
+    // whether to close popup when click overlay
+    closeOnClickOverlay: Boolean,
+    // z-index
     zIndex: [String, Number],
-    // popup 滚动时是否禁用 body 滚动
+    // prevent touchmove scroll
+    preventScroll: Boolean,
+    // prevent body scroll
     lockOnScroll: {
       type: Boolean,
       default: true
-    },
-    // 防止滚动穿透
-    preventScroll: {
-      type: Boolean,
-      default: false
-    },
-    // 遮罩层额外样式
-    overlayStyle: {
-      type: String,
-      default: ''
-    },
-    // 遮罩层额外类
-    overlayClass: {
-      type: String,
-      default: ''
     }
   },