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admin-system/node_modules/element-plus/lib/directives/mousewheel/index.js

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+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+var normalizeWheel = require('normalize-wheel-es');
+
+function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }
+
+var normalizeWheel__default = /*#__PURE__*/_interopDefaultLegacy(normalizeWheel);
+
+const SCOPE = "_Mousewheel";
+const mousewheel = function(element, callback) {
+  if (element && element.addEventListener) {
+    removeWheelHandler(element);
+    const fn = function(event) {
+      const normalized = normalizeWheel__default["default"](event);
+      callback && Reflect.apply(callback, this, [event, normalized]);
+    };
+    element[SCOPE] = { wheelHandler: fn };
+    element.addEventListener("wheel", fn, { passive: true });
+  }
+};
+const removeWheelHandler = (element) => {
+  var _a;
+  if ((_a = element[SCOPE]) == null ? void 0 : _a.wheelHandler) {
+    element.removeEventListener("wheel", element[SCOPE].wheelHandler);
+    element[SCOPE] = null;
+  }
+};
+const Mousewheel = {
+  beforeMount(el, binding) {
+    mousewheel(el, binding.value);
+  },
+  unmounted(el) {
+    removeWheelHandler(el);
+  },
+  updated(el, binding) {
+    if (binding.value !== binding.oldValue) {
+      mousewheel(el, binding.value);
+    }
+  }
+};
+
+exports.SCOPE = SCOPE;
+exports["default"] = Mousewheel;
+//# sourceMappingURL=index.js.map