CloudBase Cloud Storage (Web SDK) — reference

What it does

This reference skill documents how to perform browser-based storage operations with the CloudBase Web SDK. It explains initializing the SDK, uploading files from frontends, creating temporary preview/download URLs, deleting objects, and handling download flows in client code. The file also includes a local-development recipe for matching dev origins to CloudBase security domains.

When to use it

Use when implementing or debugging browser uploads/downloads that rely on @cloudbase/js-sdk: uploadFile, getTempFileURL, downloadFile, or deleteFile. Use it to resolve CORS/security-domain failures during local development or on custom domains. Do NOT use for backend storage administration or Mini Program file APIs.

What's included

• Scripts: none bundled (has_scripts=false)
• References: none bundled (has_references=false)
• Instructions: concise checklist and code examples showing SDK init, progress callbacks, safe URL resolution with fileIDs, temp URL generation, and deletion patterns. Emphasizes security-domain whitelist management for local dev and the danger of fabricating public URLs.

Compatible agents

Useful to coding assistants that can generate or patch frontend JavaScript/TypeScript (Copilot, Codex, Cursor, Claude Code, Gemini). The guidance is best consumed by agents that edit client-side code or advise on CORS and environment configuration.