add new attribute javascript code example
Example 1: how to add attribute to selected element in javascript
// Selecting the element
var btn = document.getElementById("myBtn");
// Setting new attributes
btn.setAttribute("class", "click-btn");
btn.setAttribute("disabled", "");
Example 2: put new attribute on html tag using javascript
// Here's what you do for the style attribute
span.setAttribute("style", "width:110%;float:center;left-margin:-10px;top-margin:-10;");