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A comprehensive guide to JavaScript Blob objects covering practical use cases for frontend developers. Topics include creating Blobs correctly, chunking large files for resumable uploads, client-side image compression using canvas, building a centralized file preview system, generating downloads without data URL pitfalls, and managing memory by properly revoking object URLs. Includes production-ready code patterns for CSV/JSON exports, avatar uploaders, and file galleries.

Blob Objects in JavaScript: A Practical Guide to Files, Previews, Downloads, and Memory

JS Development focuses on building modern, dynamic web applications using frameworks like React, Angular, and Vue.