Learning from Mini Apps (via) WeChat, Baidu, Alipay and Douyin in China are all examples of “Super apps” that can host “Mini apps” written in HTML and JavaScript by other developers and installed via in-app search or through scanning a QR code. Mini apps are granted (permission-gated) access to further system APIs via a JavaScript bridge. It’s a fascinating developer ecosystem, explored in detail here by Thomas Steiner.