humanize input javascript jquery

Question

I want to title case form inputs using the humanize library and Jquery. So far I have this:

$("#FirstName,#LastName").blur(function () {
    Humanize.titleCase( $(this) )
});

but it gives me an error:

humanize.min.js:2 Uncaught TypeError: n.split is not a function
    at o (humanize.min.js:2)
    at Object.titleCase (humanize.min.js:2)
    at HTMLInputElement.<anonymous> (<anonymous>:3:14)
    at HTMLInputElement.dispatch (jquery-2.2.4.min.js:3)
    at HTMLInputElement.r.handle (jquery-2.2.4.min.js:3)

Answer 1

Humanize.titleCase( $(this) )

should be

Humanize.titleCase( $(this).val() );

Update after @vlaz comment

the full code will be something like

$("#FirstName,#LastName").blur(function () {
    $(this).val( Humanize.titleCase( $(this).val() ) );
});