WecTeam (维C团) is the front‑end technology team of JD.com’s Jingxi business unit, focusing on front‑end engineering, web performance optimization, mini‑program and app development, serverless, multi‑platform reuse, and visual building.
This article explains why script errors appear in front‑end pages, describes methods such as enabling CORS, using try‑catch wrappers, handling JSONP and AJAX failures, and outlines logging, statistical analysis, and monitoring techniques to locate and resolve badjs issues effectively.
This article examines why third‑party JavaScript often slows sites, explains the hidden costs of convenience, and provides a step‑by‑step mitigation plan—including responsibility assignment, self‑hosting, connection pre‑connect, and lazy‑loading techniques—to help developers improve web performance.
After the 2022 Double‑11 event, JD’s JinxI platform faced fragmented H5, mini‑program, and RN codebases, prompting a comprehensive redesign that standardized the tech stack with Taro, streamlined multi‑platform development, integrated custom build pipelines, and applied performance optimizations such as image handling, API aggregation, and caching.
This article explains why a newly rebuilt site can suffer a “JavaScript hangover,” then walks through concrete front‑end performance techniques—including tree shaking, code splitting, externalizing third‑party scripts, smaller library choices, differential serving, and reducing Babel‑generated bloat—to restore speed and improve user experience.
JavaScript’s growing size threatens web performance and accessibility, so developers must evaluate when to use frameworks, adopt progressive enhancement, reduce unnecessary code, and leverage native browser features like prefetch and service workers to build faster, more sustainable, and inclusive web experiences.
This article walks you through converting an existing Node.js codebase to TypeScript, covering directory restructuring, TypeScript and ESLint setup, handling common import and type errors, configuring debugging in VSCode, and gradually strengthening type safety while preserving project functionality.
This weekly roundup from WecTeam highlights essential frontend topics—including practical Nginx tips for developers, CSS rendering fundamentals, strategies for building visual editors, declarative UI on mini‑program platforms, and engineering practices for React and TypeScript—offering concise overviews and links to the full articles.
This article explains why centering elements—both inline and block—can be tricky, reviews common pitfalls, and presents four reliable CSS techniques (text‑align, margin‑auto, absolute positioning with translate, and flexbox) with complete code examples and real‑world modal use cases.
This guide introduces Nginx fundamentals, shows how to spin up a basic Nginx service with Docker‑Compose, explains HTTP, server and location contexts, and demonstrates practical front‑end‑friendly techniques such as forward proxy, load balancing, SSI, GZIP compression, anti‑hotlinking, HTTPS and caching.
This weekly roundup highlights advanced frontend topics, including an in‑depth analysis of Promise micro‑tasks, a translation on Intersection Observer usage, an overview of browser fingerprinting techniques, the current state and future of modern web development, V8’s JavaScript execution pipeline, and Node.js applications at WeDoctor.
