最近在項(xiàng)目中，設(shè)計(jì)將tree組件里最底層的節(jié)點(diǎn)布局設(shè)計(jì)成了多列，那要怎么實(shí)現(xiàn)呢？

首先用自定義節(jié)點(diǎn)的方式渲染節(jié)點(diǎn)，在渲染方法里給最底層節(jié)點(diǎn)添加class

renderContent(h, { node, data, store }) {
    let classname = '';
    if (node.childNodes.length === 0) {
        classname = 'floatRight';
    } else if (node.childNodes.length > 0) {
        classname = 'clearFloat';
    }
    return <span class={classname}>{node.label}</span>;
}

添加class后，在節(jié)點(diǎn)展開的事件里給需要多列顯示的節(jié)點(diǎn)添加樣式

@node-expand="handleNodeExpand"
handleNodeExpand() {
    this.changeCss();
},
changeCss() {
    this.$nextTick(() => {
        var levelName = document.getElementsByClassName('floatRight');
        for (var i = 0; i < levelName.length; i++) {
            let parentNode = levelName[i].parentNode;
            parentNode.style.cssFloat = 'left';
            parentNode.style.styleFloat = 'left';
        }
        var clearFloat = document.getElementsByClassName('clearFloat');
        for (var i = 0; i < clearFloat.length; i++) {
            let parentNode = clearFloat[i].parentNode;
            parentNode.style.clear = 'both';
            parentNode.style.clear = 'both';
        }
    });
}

最終效果

QQ截圖20200623172037.png