xiaoksks

https://www.cnblogs.com/wuguanglin/p/10593013.html 按照这个来，安装@babel/preset-env，我成功了， babel.config.js .babelrc配置文件二选一，都可以

thx Problem solved ``` Tree.prototype.updateNode = function (node, newNode, options) { if (node instanceof Array) { node = node[0]; } options = $.extend({}, _default.options, options); // insert new node $.extend(node,newNode);...