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]);
}
}