SOURCE

let list =  [{"name":"福建省","children":[{"name":"厦门市","children":[{"name":"思明区"},{"name":"同安区"},{"name":"海沧区"},{"name":"湖里区"}]},{"name":"福州市","children":[{"name":"苍山区"},{"name":"鼓楼区"},{"name":"马尾区"}]}]},{"name":"广东省","children":[{"name":"深圳市","children":[{"name":"南山区"},{"name":"宝安区"}]}]}]



function getObjByTree (data, id) {
        let result = null
        if (!data) return // return; 中断执行
        for (let i in data) {
            if (result !== null) break
            let item = data[i];
            if (item.name=== id) {
                result = item;
                break;
            } else if (item.children&&item.children.length) {
                result = getObjByTree(item.children, id);
            }
        }
        return result;
    }


console.log(getObjByTree(list,'思明区'))