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node_modules/vant/lib/mixins/bind-event.js

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+"use strict";
+
+exports.__esModule = true;
+exports.BindEventMixin = BindEventMixin;
+
+var _event = require("../utils/dom/event");
+
+/**
+ * Bind event when mounted or activated
+ */
+var uid = 0;
+
+function BindEventMixin(handler) {
+  var key = "binded_" + uid++;
+
+  function bind() {
+    if (!this[key]) {
+      handler.call(this, _event.on, true);
+      this[key] = true;
+    }
+  }
+
+  function unbind() {
+    if (this[key]) {
+      handler.call(this, _event.off, false);
+      this[key] = false;
+    }
+  }
+
+  return {
+    mounted: bind,
+    activated: bind,
+    deactivated: unbind,
+    beforeDestroy: unbind
+  };
+}