js-template

# Original HTML generator
var HTMLCode = '<h1>' + pageTitle + '</h1><div id="content"><p>' + pageContent + '</p><div id="author_bio"><p>' + authorBio +'</p></div></div><div id="footer"><p>' + footerContent + '</p></div>';

# Better improvement with line breaks and format
var HTMLCode =  '\n' +
                '<h1>' + pageTitle + '</h1>\n'
                '<div id="content">\n' +
                  '<p>' + pageContent + '</p>\n' +
                  '<div id="author_bio">\n' +
                    '<p>' + authorBio + '</p>\n' +
                  '</div>\n'                '</div>\n' +
                '<div id="footer">' +
                  '<p>' + footerContent + '</p>\n' +
                '</div>\n';

# JS HTML Template
<script type="text/plain" id="entry-template">
  <h1><%- pageTitle %></h1>
  <div id="content">
     ...
  </div>
</script>
var EntriesView = Backbone.View.extend({
    template: _.template($("#entry-template").html()),
    render: function() {
        return self.template(data);
    });
});