change href attribute javascript code example

Example 1: change href for a tag using JS

document.getElementById("myAnchor").href = "http://www.cnn.com/";

Example 2: javascript set attribute href

var a = document.getElementById('myElementID');
    a.href = "http://www.mywebsite.com";

Example 3: javascript modify href attr

link.href = link.href + '?param1=' + input.value;