how to change css class in javascript code example

Example 1: dynamically change css class with javascript

document.getElementById('idOfElement').classList.add('newClassName');

Example 2: how to change css using javascript

document.getElementById("myText").className = "anyNewClass"

Example 3: syntax for manipulating a class in css

//element
element {
}
//class
.class {
}
//ID
#id {
}
//element and class
element .class {
}
//element with class and decendent
element.class decendent {
}