Spread syntaxBaseline · Widely available
The spread (...) syntax allows an iterable, such as an array or string, to be expanded in places where zero or more arguments (for function calls) or elements (for array literals) are expected.
Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Jan 15, 2020. Widely available since Jul 15, 2022.
Browser support
DesktopChrome
1–59Not supported
60+Supportedsince Jul 25, 2017
Current: 155Edge
12–18Not supported
79+Supportedsince Jan 15, 2020
Current: 154Firefox
1–54Not supported
55+Supportedsince Aug 8, 2017
Current: 157Safari
1–11Not supported
11.1+Supportedsince Apr 12, 2018
Current: 27MobileChrome Android
18–59Not supported
60+Supportedsince Aug 1, 2017
Current: 155Firefox Android
4–54Not supported
55+Supportedsince Aug 8, 2017
Current: 157Safari iOS
1–11Not supported
11.3+Supportedsince Mar 29, 2018
Current: 27How to use
This feature is Baseline widely available — use it freely, no fallback needed.
Example
Full syntax and examples are on MDN: Spread syntax.
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.
Sub-features
Support for each part of the feature (4). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| spread | 46 | 12 | 16 | 8 | 46 | 16 | 8 |
| spread.spread_in_arrays | 46 | 12 | 16 | 8 | 46 | 16 | 8 |
| spread.spread_in_function_calls | 46 | 12 | 27 | 8 | 46 | 27 | 8 |
| spread.spread_in_object_literals | 60 | 79 | 55 | 11.1 | 60 | 55 | 11.3 |