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jsdom v5.5.0 Release Notes

    • ➕ Added postMessage support, for communicating between parent windows, iframes, and combinations thereof. It's missing a few semantics, especially around origins, as well as MessageEvent source. Objects are not yet structured cloned, but instead passed by reference. But it's working, and awesome! (jeffcarp)
    • 👯 Rewrote cloning code (underlying cloneNode and importNode), fixing a number of issues:
      • Elements with weird tag names, of the type that only the parser can normally create, can now be cloned (#1142)
      • Doctypes can now be cloned, per the latest spec.
      • Attrs cannot be cloned, per the latest spec (although they still have a cloneNode method for now due to legacy).
      • Document clones now correctly copy over the URL and content-type.
    • 🛠 Fixed any virtual console output from iframes to be proxied to the parent window's virtual console. (jeffcarp)
    • 🛠 Fixed the type property of <button> elements to correctly default to submit, and to stay within the allowed range.
    • 🛠 Fixed clicking on submit <button>s to submit their containing form; previously only <input type="submit"> worked. (rxgx)
    • 🛠 Fixed document.open() to return this, per spec. (ryanseddon)

    ➕ Additionally, Joris-van-der-Wel added a benchmarking framework, and a number of benchmarks, which should help us avoid performance regressions going forward, and also make targeted performance fixes. We're already investigating some real-world issues using this framework. Very exciting!