String startsWith() and endsWith()Baseline · Widely available
The startsWith() and endsWith() methods of strings returns whether a search string appears at the beginning or end of the provided string.
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.
Browser support
DesktopChrome
1–40Not supported
41+Supportedsince Mar 3, 2015
Current: 155Edge
12+Supportedsince Jul 29, 2015
Current: 154Firefox
1–16Not supported
17+Supportedsince Nov 20, 2012
Current: 157Safari
1–8Not supported
9+Supportedsince Sep 30, 2015
Current: 27MobileChrome Android
18–35Not supported
36+Supportedsince Jul 16, 2014
Current: 155Firefox Android
4–16Not supported
17+Supportedsince Nov 20, 2012
Current: 157Safari iOS
1–8Not supported
9+Supportedsince Sep 16, 2015
Current: 27How to use
This feature is Baseline widely available — use it freely, no fallback needed.
Example
Full syntax and examples are on MDN: endsWith.
Feature detection
JS · check before using
if ("endsWith" in String || ("prototype" in String && "endsWith" in String.prototype)) {
// String.endsWith is available
}Documentation (MDN)
Specification
Sub-features
Support for each part of the feature (2). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| String.endsWith | 41 | 12 | 17 | 9 | 36 | 17 | 9 |
| String.startsWith | 41 | 12 | 17 | 9 | 36 | 17 | 9 |