jquery get selected checkboxes

$('#checkbox_id:checked').val();
//if checkbox is selected than gets its valuevar values = $('input[name=grepperRocks]:checked')
               .map(() => { return this.value }).get();var selected = [];
$('#checkboxes input:checked').each(function() {
    selected.push($(this).attr('name'));
});
let selectElement = document.getElementById("selectElement");
let valueSelected = selectElement.options[selectElement.selectedIndex].value; // get selected option value
var text= selectElement.options[selectElement.selectedIndex].text; //get the selected option text