JavaScript测试(object&& object！=="null"&& object！=="undefined") [英] Javascript test ( object && object !== "null" && object !== "undefined" )

问题描述

我似乎经常使用此测试

if( object && object !== "null" && object !== "undefined" ){
    doSomething();
}

关于 objects 的问题，我从服务调用或读取cookie回来(因为不同的浏览器返回不同的值 null ， undefined ，"null" 或"undefined" ).

on objects I get back from a service call or from reading cookies (since different browsers return the different values null, undefined, "null", or "undefined").

有没有更简单/更有效的方法来进行此检查?

Is there an easier/more efficient way of doing this check?

推荐答案

我认为您不能使它变得更简单，但是您当然可以将该逻辑重构为一个函数:

I don't think you can make that any simpler, but you could certainly refactor that logic into a function:

function isRealValue(obj)
{
 return obj && obj !== 'null' && obj !== 'undefined';
}

然后，至少您的代码变为:

Then, at least your code becomes:

if (isRealValue(yourObject))
{
 doSomething();
}

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