String includes()Baseline · Widely available
The includes() method of strings returns whether a search string appears within the 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
1–39Not supported
40+Supportedsince Aug 11, 2015
Current: 157Safari
1–8Not supported
9+Supportedsince Sep 30, 2015
Current: 27MobileChrome Android
18–40Not supported
41+Supportedsince Mar 11, 2015
Current: 155Firefox Android
4–39Not supported
40+Supportedsince Aug 11, 2015
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: includes.
Feature detection
JS · check before using
if ("includes" in String || ("prototype" in String && "includes" in String.prototype)) {
// String.includes is available
}