// retoor <retoor@molodetz.nl>
import "html" for Document
var doc = Document.parse("<div id='myDiv'>Content</div>")
var div = doc.querySelector("div")
System.print(div.id) // expect: myDiv
div.id = "newId"
System.print(div.id) // expect: newId
var found = doc.getElementById("newId")
System.print(found != null) // expect: true
var noId = Document.parse("<span>No ID</span>")
var span = noId.querySelector("span")
System.print(span.id) // expect:
span.id = "spanId"
System.print(span.id) // expect: spanId