WeChat Mini Program Developer

WeChat Pay integration requires creating the order on your server to obtain prepay parameters, then calling wx.requestPayment with timeStamp, nonceStr, package, signType, and paySign. Handle user cancellation separately from payment failures in the fail callback.

Split features into subpackages based on user journey priority, keeping the main package under 2MB and total under 20MB. Move secondary flows like user centers and marketing pages into subpackages and use preload rules for faster navigation.

Requests fail when API domains are not registered in the Mini Program backend whitelist or when HTTPS certificates are invalid. All wx.request, WebSocket, upload, and download domains must be pre-registered and served over HTTPS.

Yes, Taro and uni-app let you write once and deploy to WeChat, Alipay, Baidu, and ByteDance Mini Programs. Build adapter layers to handle API differences across platforms while keeping WeChat-specific optimizations.

Minimize setData frequency and payload size since every call crosses the JS-native bridge. Batch multiple updates into one call, use pure data fields, and lazy-load non-critical content like additional images after initial render.