How to open new tab in JavaScript without switching to the new tab?

Question

How can I open a new tab using javascript without switching to the new tab?
For example, when a user clicks on a link a new tab is to be opened, but the user should stay

Answer 1

(function(a) {
    document.body.appendChild(a);
    a.setAttribute('href', location.href);
    a.dispatchEvent((function(e) {
        e.initMouseEvent("click", true, true, window, 0, 0, 0, 0, 0, 
                         true, false, false, false, 0, null);
        return e
    }(document.createEvent('MouseEvents'))))
}(document.createElement('a')))