javascript sorting array of objects by string property

I am trying to sort an array of object by a property title. This the code snippet that I am running but it does not sort anything. The array is displayed as it is. P.S I looked at previous similar questions. This one for example here suggests and uses the same method I am using.

The javascript:

function sortLibrary() {
    // var library is defined, use it in your code
    // use console.log(library) to output the sorted library data
    console.log("inside sort");
    library.sort(function(a,b){return a.title - b.title;});
    console.log(library);

} 

// tail starts here
var library = [
    {
        author: 'Bill Gates',
        title: 'The Road Ahead',
        libraryID: 1254
    },
    {

        author: 'Steve Jobs',
        title: 'Walter Isaacson',
        libraryID: 4264
    },
    {
        author: 'Suzanne Collins',
        title: 'Mockingjay: The Final Book of The Hunger Games',
        libraryID: 3245
    }
];


sortLibrary();

The html code:

    




 Test Page 

Answer

Have you tried like this? It is working as expected

library.sort(function(a,b) {return (a.title > b.title) ? 1 : ((b.title > a.title) ? -1 : 0);} );

var library = [
    {
        author: 'Bill Gates',
        title: 'The Road Ahead',

        libraryID: 1254
    },
    {
        author: 'Steve Jobs',
        title: 'Walter Isaacson',
        libraryID: 4264
    },
    {
        author: 'Suzanne Collins',
        title: 'Mockingjay: The Final Book of The Hunger Games',

        libraryID: 3245
    }
];
console.log('before sorting...');
console.log(library);
library.sort(function(a,b) {return (a.title > b.title) ? 1 : ((b.title > a.title) ? -1 : 0);} );

console.log('after sorting...');
console.log(library);