App.vue

<template>
    <JqxSplitter :width="850" :height="850" :orientation="'horizontal'"
                 :panels="[{ size: '50%' }, { size: '50%' }]">
        <div>
            <JqxSplitter class="jqx-splitter-nested"
                         :width="'100%'" :height="'100%'" :orientation="'vertical'"
                         :panels="[{ size: 300, collapsible: false }]">
                <div>
                    <JqxSplitter class="jqx-splitter-nested"
                                 :width="'100%'" :height="'100%'" :orientation="'horizontal'"
                                 :panels="[{ size: 150 }]">
                        <div>
                            <span>Panel 1</span>
                        </div>
                        <div>
                            <span>Panel 2</span>
                        </div>
                    </JqxSplitter>
                </div>
                <div>
                    <span>Panel 3</span>
                </div>
            </JqxSplitter>
        </div>
        <div>
            <JqxSplitter class="jqx-splitter-nested"
                         :width="'100%'" :height="'100%'" :orientation="'horizontal'"
                         :panels="[{ size: 150, collapsible: false }]">
                <div>
                    <span>Panel 4</span>
                </div>
                <div>
                    <span>Panel 5</span>
                </div>
            </JqxSplitter>
        </div>
    </JqxSplitter>
</template>