MooTools 1.4.2 Released

Written By Olmo Maldonado, on Friday, December 2nd 2011, 4:03pm

Today we release MooTools Core 1.4.2 which is a small maintenance release. Upgrading from 1.4.1 should not cause any backward incompatibilities. We recommend all users upgrade to 1.4.2 as soon as possible.


  • #2073: Reduced redundant call to onTimeout if async option is true.
  • #2083: Fixes Element.clone in IE.
  • #2085: All specs are green across.
  • #2110: Element.erase('class') did not clear the class.
  • #2113: button.set('type', 'button') is now fixed for webkit bug.
  • #2116: Fixes Element.fade chain.
  • #2118: $uid method is no longer exposed


  • #2089: Added support for native mouseenter and mouseleave.
  • #2134: Deprecates the MooTools Core Specs repository in favor of including the specs in the Core repo. Due to ease of development.
  • Series of new specs and refactoring of old specs. Specs are all passing and much faster.
  • #2138: Native Element.fireEvent in IE is now accessible in via Element._fireEvent.

Known Issues

  • Documentation fixes/additions for Element.NativeEvents, Fx, Request.JSON, and conflicts between Array and Elements methods.
  • Object.each enumeration
  • Possible leak with Element.adopt
  • IE returns methods for some Element attributes.
  • Element.Delegation problem with non-elements.

These issues will be fixed subsequently prior to release of the next maintenance release.

Get it!


These fixes and improvements would not have happened if you didn’t submit an issue (ticket) to the MooTools Core Issues, or reporting your problems in the MooTools User Group. Send us your (MooTools) issues (or feature requests) so that your favorite JavaScript framework keeps getting better.

6 Responses to “MooTools 1.4.2 Released”

  1. Garrick says:

    Great work everyone!

  2. ibolmo says:

    Thanks! Round of applause for our users as well.

  3. André says:

    Great! Thx for your work! :o)

  4. Alex says:

    Thanks guys, you rock!

  5. Rolf says:


  6. false says:

    Backward issue on IE7 with mootools 1.4.2, addEvents or clones (i don’t know) cause IE7 crash when “Backward Page Button” is pressed or “Refresh Page Button” is pressed.