JSON.parse(JSON.stringify(obj))

见代码

function clone(obj) {   var objType = Object.prototype.toString.call(obj);     if(objType === [object Array] || objType === [object Object]) {     var temp = (objType === [object Array]) ? [] : {} ;     for(var k in obj) {       temp[k] = arguments.callee(obj[k]);     }     return temp;   }   return obj; }  var a=[{a:1,b:2},[1,2,3,4],function(){}];  var b={     c:[1,2,3],     d:{         c:1,         l:2     } }; var o = clone(b); var oo = clone(a); console.log(o); console.log(oo);