append attribute javascript code example
Example 1: javascript change attribute
var element = document.getElementById("elemId");
element.setAttribute("attributeName", "value");
Example 2: how to add attribute to selected element in javascript
var btn = document.getElementById("myBtn");
btn.setAttribute("class", "click-btn");
btn.setAttribute("disabled", "");
Example 3: set attribute javascript
Element.setAttribute(name, value);
Example 4: put new attribute on html tag using javascript
span.setAttribute("style", "width:110%;float:center;left-margin:-10px;top-margin:-10;");