RegExp.prototype.unicode
summary
ES6 adds a U flag that actually changes RegExp behavior: it enables Unicode code point escapes, makes dot and quantifiers treat astral code points as single symbols, fixes character-class ranges and negation, and applies Unicode case folding when combined with I. A transpiler/polyfill approach (using tools like regenerate and existing Babel/Traceur support) converts U-aware regexes to ES5 equivalents so code runs now across browsers.
AI-written summary · about
chapters (15)
- 0:00Start
- 0:33What Is Unicode
- 1:38Latin Small Letter a
- 2:53The Basic Multilingual Plane
- 3:31Astral Planes
- 10:20Quantifiers
- 13:09Character Class Ranges
- 13:37Syntax Error
- 14:23Negated Character Classes
- 15:20Character Class Escapes
- 17:41Gaze Folding
- 21:03Browser Support
- 22:50Explain How Regexp Works Internally
- 29:08Summary
- 38:13Internal Encoding
