getElementById remove class code example

Example 1: javascript remoev css class

//remove a css class from an element
document.getElementById("myElementID").classList.remove("class_name");

Example 2: remove element by class

function removeElementsByClass(className){
    var elements = document.getElementsByClassName(className);
    while(elements.length > 0){
        elements[0].parentNode.removeChild(elements[0]);
    }
}