WordPress
While developing, there used to be a white space on top of every page, which is quite annoying and hard to remove.
I found a way to solve it in elementor:
Edit any page in elementor, and press the Website Setting on top left, delete the container padding.
Bingo!
之前开发的网页，最上方总是有一条留白，无法删除。后来在elementor中找到了解决办法：
随便编辑一个网页，进入elementor编辑模式，左上有_站点设置_，点击后删除_容器内距_或者设置为0.
搞定！
Retool
Retool is a convenient tool to build UI directly related to the database. Javascript can be used, it feels a lot like React with a dragable interface.
But it can not add/delete/modify components dynamiclly.
ListView can be used, just like in React using map function to create things from a dataset(may be a list or a query from database).
But the updating efficiency may be a problem, still need to be tested.
Retool用来搭建和数据库直接相关的界面非常方便，也支持JS脚本，感觉上和React很像。
不过Retool不能动态管理组件，比如有一个动态的列表，想根据这个列表生成组件很有难度。
ListView可以有类似于React中的_map_的效果，但是更新效率可能会成为问题，还需要进一步验证。