Write me a code that returns all the <article> tags of a DOM who has a span that contains "test" string.
function test() { var x = document.getElementsByTagName("article"); for (var i = 0; i < x.length; i++) { var element = x[i].getElementsByTagName("span"); for (var j = 0; j < element.length; j++) { if (element[j].innerHTML == "test") { console.log(x[i]); } } } }