coderef

Unicode point escapesBaseline · Widely available

Unicode point escapes (\\u{}) represent Unicode characters within strings.

Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Sep 30, 2015. Widely available since Mar 30, 2018.

How to use ↓Compare browsers

Browser support

DesktopChrome
1–43Not supported
44+Supportedsince Jul 21, 2015
Current: 155
Edge
12+Supportedsince Jul 29, 2015
Current: 154
Firefox
1–39Not supported
40+Supportedsince Aug 11, 2015
Current: 157
Safari
1–8Not supported
9+Supportedsince Sep 30, 2015
Current: 27
MobileChrome Android
18–43Not supported
44+Supportedsince Jul 29, 2015
Current: 155
Firefox Android
4–39Not supported
40+Supportedsince Aug 11, 2015
Current: 157
Safari iOS
1–8Not supported
9+Supportedsince Sep 16, 2015
Current: 27

How to use

This feature is Baseline widely available — use it freely, no fallback needed.

Example

Full syntax and examples are on MDN: Lexical grammar#unicode code point escapes.

Feature detection

JS · check before using
// Syntax can't be tested with an if-statement — an unsupported
// browser fails to parse the whole script. Either transpile for older
// targets (e.g. Babel/TypeScript/esbuild), or probe in isolation:
let supported = true;
try {
  new Function("/* code that uses the syntax */");
} catch {
  supported = false;
}

This is a language syntax feature.

Documentation (MDN)

Specification