Do it like => validates :photos, attached: true, content_type: ['image/png', 'image/jpg', 'image/jpeg'], size: { less_than: 500.kilobytes }, limit: { min: 1, max: 3 }, aspect_ratio: :landscape, dim…

A UI library by WeChat official design team, includes the most useful widgets/modules.

Google map library for react that allows rendering components as markers 🎉

小程序项目分层架构

微信小程序开发资源汇总 💯

Tools of The Trade, from Hacker News.