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node_modules/vant/lib/swipe-item/index.js

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+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+
+exports.__esModule = true;
+exports.default = void 0;
+
+var _extends2 = _interopRequireDefault(require("@babel/runtime/helpers/extends"));
+
+var _utils = require("../utils");
+
+var _relation = require("../mixins/relation");
+
+var _createNamespace = (0, _utils.createNamespace)('swipe-item'),
+    createComponent = _createNamespace[0],
+    bem = _createNamespace[1];
+
+var _default = createComponent({
+  mixins: [(0, _relation.ChildrenMixin)('vanSwipe')],
+  data: function data() {
+    return {
+      offset: 0,
+      inited: false,
+      mounted: false
+    };
+  },
+  mounted: function mounted() {
+    var _this = this;
+
+    this.$nextTick(function () {
+      _this.mounted = true;
+    });
+  },
+  computed: {
+    style: function style() {
+      var style = {};
+      var _this$parent = this.parent,
+          size = _this$parent.size,
+          vertical = _this$parent.vertical;
+
+      if (size) {
+        style[vertical ? 'height' : 'width'] = size + "px";
+      }
+
+      if (this.offset) {
+        style.transform = "translate" + (vertical ? 'Y' : 'X') + "(" + this.offset + "px)";
+      }
+
+      return style;
+    },
+    shouldRender: function shouldRender() {
+      var index = this.index,
+          inited = this.inited,
+          parent = this.parent,
+          mounted = this.mounted;
+
+      if (!parent.lazyRender || inited) {
+        return true;
+      } // wait for all item to mount, so we can get the exact count
+
+
+      if (!mounted) {
+        return false;
+      }
+
+      var active = parent.activeIndicator;
+      var maxActive = parent.count - 1;
+      var prevActive = active === 0 && parent.loop ? maxActive : active - 1;
+      var nextActive = active === maxActive && parent.loop ? 0 : active + 1;
+      var shouldRender = index === active || index === prevActive || index === nextActive;
+
+      if (shouldRender) {
+        this.inited = true;
+      }
+
+      return shouldRender;
+    }
+  },
+  render: function render() {
+    var h = arguments[0];
+    return h("div", {
+      "class": bem(),
+      "style": this.style,
+      "on": (0, _extends2.default)({}, this.$listeners)
+    }, [this.shouldRender && this.slots()]);
+  }
+});
+
+exports.default = _default;