Answers for "dom find by class"

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";
}

how to get element by class name javascript

document.getElementsByClassName("legend").style.display="none";