how to change a attribute of tags in html code example
Example 1: javascript setattribute
element.setAttribute(<name>, <value>);
// ex
var aElement = document.querySelector("a");
aElement.setAttribute("href", "https://isitchristmas.com/");
// same as <a href="https://isitchristmas.com/"></a>
Example 2: html change attribute
element.setAttribute(name, value);
var d = document.getElementById("d1");
d.setAttribute("align", "center");