Enhance custom call

Relatively new to php programming but I’m trying to get my wordpress installation to load in some custom js files with some embedded code using the enhance.js framework

//call enhance() function, include relevant assets for capable browsers
enhance({
loadStyles: [
'<?php bloginfo('stylesheet_url'); ?>',
{href:'<?php get_bloginfo('template_directory'); ?> . '/css/handheld.css' , media: 'only screen and (max-width: 479px)'}
],
});
//check if the browser displays the screen media type
enhance.mediaquery('screen');
//returns true/false

I keep getting an error centred around the stylesheet url

missing ] after element list
[Break On This Error] '<?php get_bloginfo('stylesheet_url'); ?>',

I’m stumped. Everything else loads in fine.
Any help greatly appreciated