Reserved keywords in JavaScript
Read OriginalThis article provides a detailed, version-by-version breakdown of all reserved keywords in JavaScript, from ECMAScript 1 through ES6 (ES2015). It explains which keywords were added or removed in each specification, notes strict mode restrictions, and clarifies the status of identifiers like 'eval', 'arguments', 'NaN', and 'Infinity'. The guide is a practical reference for developers to avoid syntax errors when naming variables.
Comments
No comments yet
Be the first to share your thoughts!
Browser Extension
Get instant access to AllDevBlogs from your browser
Top of the Week
1
Using Browser Apis In React Practical Guide
Jivbcoop
•
2 votes
2
Better react-hook-form Smart Form Components
Maarten Hus
•
2 votes
3
Top picks — 2026 January
Paweł Grzybek
•
1 votes
4
In Praise of –dry-run
Henrik Warne
•
1 votes
5
Deep Learning is Powerful Because It Makes Hard Things Easy - Reflections 10 Years On
Ferenc Huszár
•
1 votes
6
Vibe coding your first iOS app
William Denniss
•
1 votes
7
AGI, ASI, A*I – Do we have all we need to get there?
John D. Cook
•
1 votes
8
Quoting Thariq Shihipar
Simon Willison
•
1 votes
9
Dew Drop – January 15, 2026 (#4583)
Alvin Ashcraft
•
1 votes