set attribute html element code example

Example 1: set attribute javascript

Element.setAttribute(name, value);

Example 2: set attribute in javascript

//Fetch id from html
var a = document.getElementById("id");

//variable.setAttribute("Attributes","Properties:Values")
a.setAttribute("style", "visibility:hidden;");

Example 3: 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;");

Example 4: set property dom javascrpt

document.getElementsByTagName("H1")[0].setAttribute("class", "democlass");