Layout Event

<div data-ax5layout="ax1" data-config="{layout:"split-panel", orientation: "vertical"}" style="height: 200px;border:1px solid #ccc;">
    <div data-split-panel="{width: "*"}"></div>
    <div data-splitter="{}"></div>
    <div data-split-panel="{width: "*"}"></div>
    <div data-splitter="{}"></div>
    <div data-split-panel="{width: "*"}"></div>
</div>

<script type="text/javascript">
    var toast = new ax5.ui.toast({
        theme: "primary",
        containerPosition: "top-right"
    });

    $(document.body).ready(function () {
        $('[data-ax5layout]').ax5layout({
            onResize: function(){
                toast.push('Resize');
                console.log(this); // check your console
            }
        });
    });
</script>