补救方法：
详情：http://es6.ruanyifeng.com/#docs/array
取出文本内容
实现深拷贝
jq实现不完全深拷贝
jQuery.extend = jQuery.fn.extend = function () {var options, name, src, copy, copyIsArray, clone,target = arguments[0] || {},i = 1,length = arguments.length,deep = false;// Handle a deep copy situation if (typeof target === "boolean") {deep = target;target = arguments[1] || {};// skip the boolean and the target i = 2;}// Handle case when target is a string or something (possible in deep copy) if (typeof target !== "object" && !jQuery.isFunction(target)) {target = {};}// extend jQuery itself if only one argument is passed if (length === i) {target = this;--i;}for (; i < length; i++) {// Only deal with non-null/undefined values if ((options = arguments[i]) != null) {// Extend the base object for (name in options) {src = target[name];copy = options[name];// Prevent never-ending loop if (target === copy) {continue;}// Recurse if we're merging plain objects or arrays if (deep && copy && (jQuery.isPlainObject(copy) || (copyIsArray = jQuery.isArray(copy)))) {if (copyIsArray) {copyIsArray = false;clone = src && jQuery.isArray(src) ? src : [];} else {clone = src && jQuery.isPlainObject(src) ? src : {};}// Never move original objects, clone them target[name] = jQuery.extend(deep, clone, copy);// Don't bring in undefined values } else if (copy !== undefined) {target[name] = copy;}}}}// Return the modified object return target;
};
取巧的方式：
JSON.stringify()和
JSON.parse()
