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node_modules/vant/es/switch/index.css

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+.van-switch{position:relative;display:inline-block;box-sizing:content-box;width:2em;height:1em;font-size:30px;background-color:#fff;border:1px solid rgba(0,0,0,.1);border-radius:1em;cursor:pointer;-webkit-transition:background-color .3s;transition:background-color .3s}.van-switch__node{position:absolute;top:0;left:0;width:1em;height:1em;font-size:inherit;background-color:#fff;border-radius:100%;box-shadow:0 3px 1px 0 rgba(0,0,0,.05),0 2px 2px 0 rgba(0,0,0,.1),0 3px 3px 0 rgba(0,0,0,.05);-webkit-transition:-webkit-transform .3s cubic-bezier(.3,1.05,.4,1.05);transition:-webkit-transform .3s cubic-bezier(.3,1.05,.4,1.05);transition:transform .3s cubic-bezier(.3,1.05,.4,1.05);transition:transform .3s cubic-bezier(.3,1.05,.4,1.05),-webkit-transform .3s cubic-bezier(.3,1.05,.4,1.05)}.van-switch__loading{top:25%;left:25%;width:50%;height:50%;line-height:1}.van-switch--on{background-color:#1989fa}.van-switch--on .van-switch__node{-webkit-transform:translateX(1em);transform:translateX(1em)}.van-switch--on .van-switch__loading{color:#1989fa}.van-switch--disabled{cursor:not-allowed;opacity:.5}.van-switch--loading{cursor:default}

node_modules/vant/es/switch/index.js

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+// Utils
+import { createNamespace, addUnit } from '../utils';
+import { switchProps } from './shared'; // Mixins
+
+import { FieldMixin } from '../mixins/field'; // Components
+
+import Loading from '../loading';
+
+var _createNamespace = createNamespace('switch'),
+    createComponent = _createNamespace[0],
+    bem = _createNamespace[1];
+
+export default createComponent({
+  mixins: [FieldMixin],
+  props: switchProps,
+  computed: {
+    checked: function checked() {
+      return this.value === this.activeValue;
+    },
+    style: function style() {
+      return {
+        fontSize: addUnit(this.size),
+        backgroundColor: this.checked ? this.activeColor : this.inactiveColor
+      };
+    }
+  },
+  methods: {
+    onClick: function onClick(event) {
+      this.$emit('click', event);
+
+      if (!this.disabled && !this.loading) {
+        var newValue = this.checked ? this.inactiveValue : this.activeValue;
+        this.$emit('input', newValue);
+        this.$emit('change', newValue);
+      }
+    },
+    genLoading: function genLoading() {
+      var h = this.$createElement;
+
+      if (this.loading) {
+        var color = this.checked ? this.activeColor : this.inactiveColor;
+        return h(Loading, {
+          "class": bem('loading'),
+          "attrs": {
+            "color": color
+          }
+        });
+      }
+    }
+  },
+  render: function render() {
+    var h = arguments[0];
+    var checked = this.checked,
+        loading = this.loading,
+        disabled = this.disabled;
+    return h("div", {
+      "class": bem({
+        on: checked,
+        loading: loading,
+        disabled: disabled
+      }),
+      "attrs": {
+        "role": "switch",
+        "aria-checked": String(checked)
+      },
+      "style": this.style,
+      "on": {
+        "click": this.onClick
+      }
+    }, [h("div", {
+      "class": bem('node')
+    }, [this.genLoading()])]);
+  }
+});

node_modules/vant/es/switch/index.less

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+@import '../style/var';
+
+.van-switch {
+  position: relative;
+  display: inline-block;
+  box-sizing: content-box;
+  width: @switch-width;
+  height: @switch-height;
+  font-size: @switch-size;
+  background-color: @switch-background-color;
+  border: @switch-border;
+  border-radius: @switch-node-size;
+  cursor: pointer;
+  transition: background-color @switch-transition-duration;
+
+  &__node {
+    position: absolute;
+    top: 0;
+    left: 0;
+    width: @switch-node-size;
+    height: @switch-node-size;
+    // https://github.com/vant-ui/vant/issues/9839
+    font-size: inherit;
+    background-color: @switch-node-background-color;
+    border-radius: 100%;
+    box-shadow: @switch-node-box-shadow;
+    transition: transform @switch-transition-duration
+      cubic-bezier(0.3, 1.05, 0.4, 1.05);
+  }
+
+  &__loading {
+    top: 25%;
+    left: 25%;
+    width: 50%;
+    height: 50%;
+    line-height: 1;
+  }
+
+  &--on {
+    background-color: @switch-on-background-color;
+
+    .van-switch__node {
+      transform: translateX(@switch-width - @switch-node-size);
+    }
+
+    .van-switch__loading {
+      color: @switch-on-background-color;
+    }
+  }
+
+  &--disabled {
+    cursor: not-allowed;
+    opacity: @switch-disabled-opacity;
+  }
+
+  &--loading {
+    cursor: default;
+  }
+}

node_modules/vant/es/switch/shared.js

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+/**
+ * Common Switch Props
+ */
+export var switchProps = {
+  size: [Number, String],
+  value: null,
+  loading: Boolean,
+  disabled: Boolean,
+  activeColor: String,
+  inactiveColor: String,
+  activeValue: {
+    type: null,
+    default: true
+  },
+  inactiveValue: {
+    type: null,
+    default: false
+  }
+};

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

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

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

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