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 href="https://stackoverflow.com/questions/1129216/sort-array-of-objects-by-string-property-value-in-javascript">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:

                        charset="UTF-8">





            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);}
            );

data-lang="js" data-hide="false" data-console="true"
data-babel="false">

class="snippet-code-js lang-js prettyprint-override">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);