select option add or remove class code example

Example 1: add and remove class in jquery

$('#toggle li').on('click', function () {
    $(this).toggleClass('open')
});

Example 2: js remove class

const removeClass = (element, name) => {
    const pattern = new RegExp('(?:^|\\s)'+ name + '(?:\\s|$)', 'g');
    element.className = element.className.replace(pattern, "");
};