2026-07-025 min readhls.js not working, hls.js error, hls.js debug
Hls.js Not Working? Debugging Tips & Solutions
Developer guide to debugging hls.js issues. Fix common JavaScript errors, configuration problems, and browser compatibility issues.
Common Hls.js Issues
hls.js fails to load = CDN down; Hls is not defined = script timing issue; MediaError = video element rejected source; NetworkError = failed to load playlist or segment.
Enable Debug Logging
Set debug: true in Hls config. This logs playlist loading, segment fetching, buffer management, and error recovery to the console.
Common Error Events and Their Meanings
MANIFEST_LOAD_ERROR = can't fetch playlist; FRAG_LOAD_ERROR = segment load failure (most common); BUFFER_APPEND_ERROR = codec issue; KEY_LOAD_ERROR = can't load decryption key.