Javascript insertAdjacentHTML not working

Question

In fiddle - http://jsfiddle.net/u3bmytnL/, does not work as expected

var x = document.createElement("button");
x.textContent = "byyyyy";
elx = document.getElementById("el");
elx.insertAdjacentHTML('afterend', x); 

Answer 1

That's should resolve:

var x = document.createElement("BUTTON");
var text = document.createTextNode("byyyy");
x.appendChild(text);
elx = document.getElementById("el");
elx.insertAdjacentHTML('afterend', x.outerHTML); 

The insertAdjacentHTML needs a string as second parameter, and you was passing a DOM element, so you need to get the HTML string