Answers for "getelementsbyclassname a tag"

getelementbyclass

var selector = document.getElementsByClassName('class-name');

how to get element by class name javascript

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

get elment by id within get element byclassname

var targetDiv = document.getElementById("foo").getElementsByClassName("bar")[0];
targetDiv.textContent = "Goodbye world!";