document getelementsbyclassname code example
Example 1: javascript get element by class
var elementsArray = document.getElementsByClassName("someclassname");
Example 2: getelementbyclass
var selector = document.getElementsByClassName('class-name');
Example 3: javascript document object model getElementsByClassName
document.getElementsByClassName('test')
Example 4: get elment by id within get element byclassname
var targetDiv = document.getElementById("foo").getElementsByClassName("bar")[0];
targetDiv.textContent = "Goodbye world!";