What's wrong with this Jade data binding?

Question

What's wrong with this Jade? Thanks.

input#a
h1= document.getElementById('a').value

The error given is blank.

Answer 1

As Amberlamps suggests, you have to wait until the DOM is ready.

input#a
h1

//- presuming you are using jQuery
script
    $(function() {
        $('h1').html($('input#a').val());
    });