JS equivalent of jQuery .is()

Question

Is there a pure JS equivalent of jQuery .is() on modern browsers?

I know there is the querySelector method, but I want to check the node itself, rather than finding child nodes.

Answer 1

Looks like matchesSelector is what I want.

https://developer.mozilla.org/en-US/docs/Web/API/Element.matches

Polyfill is here:

https://gist.github.com/jonathantneal/3062955

this.Element && function(ElementPrototype) {
    ElementPrototype.matchesSelector = ElementPrototype.matchesSelector || 
    ElementPrototype.mozMatchesSelector ||
    ElementPrototype.msMatchesSelector ||
    ElementPrototype.oMatchesSelector ||
    ElementPrototype.webkitMatchesSelector ||
    function (selector) {
        var node = this, nodes = (node.parentNode || node.document).querySelectorAll(selector), i = -1;

        while (nodes[++i] && nodes[i] != node);

        return !!nodes[i];
    }
}(Element.prototype);