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Specifying Splitter Side Animation does not work in 2.5.2

  • I’m trying to use the different splitter side animations in Onsen 2.5.2. Running in Chrome Version 60.0.3112.90, I get the following console error:

    onsenui.js:731 Uncaught (in promise) TypeError: Invalid value used as weak map key
        at WeakMap.set (native)
        at addCallback (
        at contentReady (
        at PushSplitterAnimator.activate (
        at HTMLElement._updateAnimation (
        at HTMLElement._update (
        at HTMLElement.attributeChangedCallback (
        at CustomElementInternals.attributeChangedCallback (
        at HTMLElement.setAttribute (<:89435:16)
        at Object.setValueForAttribute (

    I used it like this:

            borderRight: '1px solid #cccccc'
        onClose={ () =>

    I noticed that it doesn’t seem to work in the online demos either.

  • Onsen UI

    @sherscher Hey, thanks for reporting! There was already an issue on Github about this and is now closed. It will be released soon.