Javascript Algorithm : Sorting Object array based on key

How to sort an object array based on its key ?

var game_popularity1 = [

{ game: "fruit ninja", popularity: 78 },

{ game: "road runner", popularity: 20 },

{ game: "maze runner", popularity: 40 },

{ game: "ludo", popularity: 75 },

{ game: "temple runner", popularity: 86 }

];

var game_popularity2 = [

{ game: "fruit ninja", popularity: 78 },

{ game: "road runner", popularity: 20 },

{ game: "maze runner", popularity: 40 },

{ game: "ludo", popularity: 75 },

{ game: "temple runner", popularity: 86 }

];

//Sort By Numberic Property

game_popularity1.sort((a, b) => {

if (a.popularity == b.popularity) return 0;

else if (a.popularity < b.popularity) {

return -1

} else {

return 1

}

});

//Sort By String Property

game_popularity2.sort((a, b) => {

if (a.game == b.game) return 0;

else if (a.game > b.game) {

return -1

} else {

return 1

}

});

console.log("Numeric Sort:",game_popularity1);

console.log("String Sort:",game_popularity2);