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node_modules/vant/es/collapse/index.js

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+import { createNamespace } from '../utils';
+import { ParentMixin } from '../mixins/relation';
+import { BORDER_TOP_BOTTOM } from '../utils/constant';
+
+var _createNamespace = createNamespace('collapse'),
+    createComponent = _createNamespace[0],
+    bem = _createNamespace[1];
+
+export default createComponent({
+  mixins: [ParentMixin('vanCollapse')],
+  props: {
+    accordion: Boolean,
+    value: [String, Number, Array],
+    border: {
+      type: Boolean,
+      default: true
+    }
+  },
+  methods: {
+    switch: function _switch(name, expanded) {
+      if (!this.accordion) {
+        name = expanded ? this.value.concat(name) : this.value.filter(function (activeName) {
+          return activeName !== name;
+        });
+      }
+
+      this.$emit('change', name);
+      this.$emit('input', name);
+    }
+  },
+  render: function render() {
+    var _ref;
+
+    var h = arguments[0];
+    return h("div", {
+      "class": [bem(), (_ref = {}, _ref[BORDER_TOP_BOTTOM] = this.border, _ref)]
+    }, [this.slots()]);
+  }
+});

node_modules/vant/es/collapse/style/index.js

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+import '../../style/base.css';

node_modules/vant/es/collapse/style/less.js

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+import '../../style/base.less';