feat: 第一次上传代码

node_modules/lottie-web/player/js/utils/BaseEvent.js

@@ -0,0 +1,42 @@
+function BaseEvent() {}
+BaseEvent.prototype = {
+  triggerEvent: function (eventName, args) {
+    if (this._cbs[eventName]) {
+      var callbacks = this._cbs[eventName];
+      for (var i = 0; i < callbacks.length; i += 1) {
+        callbacks[i](args);
+      }
+    }
+  },
+  addEventListener: function (eventName, callback) {
+    if (!this._cbs[eventName]) {
+      this._cbs[eventName] = [];
+    }
+    this._cbs[eventName].push(callback);
+
+    return function () {
+      this.removeEventListener(eventName, callback);
+    }.bind(this);
+  },
+  removeEventListener: function (eventName, callback) {
+    if (!callback) {
+      this._cbs[eventName] = null;
+    } else if (this._cbs[eventName]) {
+      var i = 0;
+      var len = this._cbs[eventName].length;
+      while (i < len) {
+        if (this._cbs[eventName][i] === callback) {
+          this._cbs[eventName].splice(i, 1);
+          i -= 1;
+          len -= 1;
+        }
+        i += 1;
+      }
+      if (!this._cbs[eventName].length) {
+        this._cbs[eventName] = null;
+      }
+    }
+  },
+};
+
+export default BaseEvent;