What are the key differences between NodeList and HTMLCollection?
Tests DOM snapshot vs live binding: querySelectorAll returns a static NodeList, getElementsByTagName returns a live HTMLCollection. Strong answers note childNodes is a live NodeList and warn against caching length during DOM mutation.
Tests DOM snapshot vs live binding: querySelectorAll returns a static NodeList; getElementsByTagName returns a live HTMLCollection mirroring DOM changes. Strong answers contrast both, note Node.childNodes is a live NodeList exception, warn against caching length during mutation loops, explain why iteration safety matters in production, and mention neither is a true array though both iterate and convert via Array.from.
Read the original → developer.mozilla.org
- #dom
- #javascript
- #web-apis
- #browser
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