Question

I can’t understant if it is my use of hasClass or an issue with my var sectionClass but my script won’t work. (My console.log return my class name very well).

$('#menu button').each(function(){
    var sectionClass = $(this).attr('class');
    $(this).click(function(){
        console.log (sectionClass);
        $('section').hasClass(sectionClass).show();
    });
});

Answer 1

You want to write

$('#menu button').each(function(){
    var sectionClass = $(this).attr('class');
    $(this).click(function(){
        console.log (sectionClass);
        $('section.' + sectionClass).show();
    });
});