Answers for "find element by CLASS M=NAME"

javascript get element by class

var elementsArray = document.getElementsByClassName("someclassname");

get element by class

var x = document.getElementsByClassName("example");
var i;
for (i = 0; i < x.length; i++) {
  x[i].style.backgroundColor = "red";
}

Finding HTML Elements by Class Name

const x = document.getElementsByClassName("intro");