can we use if-else loop inside json file?

I want to include an if-else condition in json based on which I need to set an attribute in the json file.

Ex:-

"identifier": "navTag",
    "items": [{
            "label": "abc",
            "url": "yxz.com",

},
{
            "label": "abc1",
            "url": "yxz1.com",

},
{
            "label": "abc2",  
            "url": "yxz2.com",// *I need to change this value on certain 
                                 condition like if condition is true then 
                           "url": xyz2.com if false  "url":xyz3.com*

}
]
}

Hope the question is clear.. Any help will be appreciated Thanks