• Dramatically upgraded our XML parser, from the unmaintained sax package to the well-maintained saxes replacement. This increases our specification conformance, including rejecting certain ill-formed XML documents that were previously accepted, and properly handling other constructs like empty comments, CDATA sections, and <script> elements. (lddubeau)
• Added fieldsetEl.elements and fieldsetEl.type properties.
• Added the options parameter to dom.runVMScript(). (SimenB)
• Added the ability for custom resource loader fetch() implementations to see what element initiated the fetch. (sarvaje)
• Fixed input and change events for <input> elements to be trusted and uncancelable.
• "Fixed" <script>s with the async attribute to not execute before sync <script>s that precede them. We still do not, in general, have proper execution of scripts during the initial parsing of a document, so this fix is more of a reduction of badness than an alignment with the specification. This behavior regressed in v12.0.0. (sarvaje)