Saber el grid de materialize 1: s, m, l y xl.
// Testeado:
// jQuery 2.2.3 - 3.2.1
// Materialize 1.0
function findMaterializeEnvironment() {
var envs = ['small', 'med', 'large', 'xl'],
$el = $('<div>'),
i = 0,
env;
$el.appendTo($('body'));
for (i = 0; i < envs.length; i++) {
$el.addClass('hide-on-' + envs[i] + '-only');
if ($el.is(':hidden' || envs[i] == 'xl')) {
$el.remove();
return envs[i];
}
}
}
window.alert(findMaterializeEnvironment());