🦕🦕React阻止事件冒泡？

function contains(root, n) {
    var node = n;
    while (node) {
        if (node === root) {
            return true;
        }
        node = node.parentNode;
    }
    return false;
}
handleClick (e) {
    if(e.target.nodeName === 'li'){
        // do something
    }
    if(contains(this.root, e.target)){
        // do something
    }
}