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node_modules/vant/lib/overlay/index.css

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+.van-overlay{position:fixed;top:0;left:0;z-index:1;width:100%;height:100%;background-color:rgba(0,0,0,.7)}

node_modules/vant/lib/overlay/index.js

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+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+
+exports.__esModule = true;
+exports.default = void 0;
+
+var _babelHelperVueJsxMergeProps = _interopRequireDefault(require("@vue/babel-helper-vue-jsx-merge-props"));
+
+var _extends2 = _interopRequireDefault(require("@babel/runtime/helpers/extends"));
+
+var _utils = require("../utils");
+
+var _functional = require("../utils/functional");
+
+var _event = require("../utils/dom/event");
+
+// Utils
+var _createNamespace = (0, _utils.createNamespace)('overlay'),
+    createComponent = _createNamespace[0],
+    bem = _createNamespace[1];
+
+function preventTouchMove(event) {
+  (0, _event.preventDefault)(event, true);
+}
+
+function Overlay(h, props, slots, ctx) {
+  var style = (0, _extends2.default)({
+    zIndex: props.zIndex
+  }, props.customStyle);
+
+  if ((0, _utils.isDef)(props.duration)) {
+    style.animationDuration = props.duration + "s";
+  }
+
+  return h("transition", {
+    "attrs": {
+      "name": "van-fade"
+    }
+  }, [h("div", (0, _babelHelperVueJsxMergeProps.default)([{
+    "directives": [{
+      name: "show",
+      value: props.show
+    }],
+    "style": style,
+    "class": [bem(), props.className],
+    "on": {
+      "touchmove": props.lockScroll ? preventTouchMove : _utils.noop
+    }
+  }, (0, _functional.inherit)(ctx, true)]), [slots.default == null ? void 0 : slots.default()])]);
+}
+
+Overlay.props = {
+  show: Boolean,
+  zIndex: [Number, String],
+  duration: [Number, String],
+  className: null,
+  customStyle: Object,
+  lockScroll: {
+    type: Boolean,
+    default: true
+  }
+};
+
+var _default = createComponent(Overlay);
+
+exports.default = _default;

node_modules/vant/lib/overlay/index.less

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+@import '../style/var';
+
+.van-overlay {
+  position: fixed;
+  top: 0;
+  left: 0;
+  z-index: @overlay-z-index;
+  width: 100%;
+  height: 100%;
+  background-color: @overlay-background-color;
+}

node_modules/vant/lib/overlay/style/index.js

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+require('../../style/base.css');
+require('../index.css');

node_modules/vant/lib/overlay/style/less.js

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+require('../../style/base.less');
+require('../index.less');