how to set href value of anchor tag in javascript code example

Example 1: get attribute value jquery href

var href = $(this).attr('href');

Example 2: get href attribute javascript

document.getElementById("link")[0].getAttribute("href");

Example 3: javascript find link by href

//Selects all links with href='http://domain.com'
document.querySelectorAll("a[href='http://domain.com']");