您可以遍历对象：
var test = { test1 : null, test2 : 'somestring', test3 : 3,}function clean(obj) { for (var propName in obj) { if (obj[propName] === null || obj[propName] === undefined) { delete obj[propName]; } }}clean(test);如果您担心此属性删除不会使对象的proptype链运行起来，则还可以：
function clean(obj) { var propNames = Object.getOwnPropertyNames(obj); for (var i = 0; i < propNames.length; i++) { var propName = propNames[i]; if (obj[propName] === null || obj[propName] === undefined) { delete obj[propName]; } }}有关null与未定义的一些注意事项：
test.test1 === null; // truetest.test1 == null; // truetest.notaprop === null; // falsetest.notaprop == null; // truetest.notaprop === undefined; // truetest.notaprop == undefined; // true
