javascript hasclass

1if (myElement.classList.contains('someClassname')) {
2    // do something
3}

1var count_elements = $('.class').length;

1document.body.classList.add('thisClass');
2// $('body').addClass('thisClass');
3
4document.body.classList.remove('thatClass');
5// $('body').removeClass('thatClass');
6
7document.body.classList.toggle('anotherClass');
8// $('body').toggleClass('anotherClass');

1if (document.body.classList.contains('thatClass')) {
2    // do some stuff
3}

1
2        
3            
4        
5     element.classList.contains(className);Code language: CSS (css)

1$('.check-fields').on('click', function () {
2
3    var reqlength = $('.required-entry').length;
4    console.log(reqlength);
5    var value = $('.required-entry').filter(function () {
6        return this.value != '';
7    });
8
9    if (value.length>=0 && (value.length !== reqlength)) {
10        alert('Please fill out all required fields.');
11    } else {
12        alert('Everything has a value.');
13    }
14});