add class to all nodelist code example

Example: add to classlist javascript

Add multiple classes to a 
element: document.getElementById("myDIV").classList.add("mystyle", "anotherClass", "thirdClass"); Remove a class from a
element: document.getElementById("myDIV").classList.remove("mystyle"); Remove multiple classes from a
element: document.getElementById("myDIV").classList.remove("mystyle", "anotherClass", "thirdClass"); Toggle between two classes for a
element: document.getElementById("myDIV").classList.toggle("newClassName"); Find out if an element has a "mystyle" class: document.getElementById("myDIV").classList.contains("mystyle");

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Misc Example