WeChat Mini Programs Client API
Client-side JavaScript API exposed inside the WeChat runtime to Mini Programs and Mini Games. Covers network (wx.request, wx.downloadFile, wx.uploadFile), storage, UI / navigation, media (audio, video, camera, image), location, device (Bluetooth, NFC, Wi-Fi, sensors), file system, canvas, payment invocation (wx.requestPayment), login (wx.login), and the WeChat-provided UI components. Apps are built with WXML / WXSS / JS and packaged via the WeChat Developer Tools.