Cannot read property 'tagName' of null

[thomas-negrault]

With a simple html demo file I have this error

gridifier.js:542 Uncaught TypeError: Cannot read property 'tagName' of null

In gridifier.js line 542, which is:
isNative: function(t) { return "undefined" != typeof t && "undefined" != typeof t.tagName && "undefined" != typeof t.nodeName && "undefined" != typeof t.ownerDocument && "undefined" != typeof t.removeAttribute ? !0 : !1; },

My page is a simple demo with code provided in the usage page, "Examples of setting collection type:"

[thomas-negrault]

I think the line
var demoGrid = document.getElementById("#demo-grid");
should be replace by
var demoGrid = document.getElementById("demo-grid"); (no #)
in http://gridifier.io/essentials/usage

Edit: all the examples use getElementById("#id") instead of getElementById("id")