String (initial support)Baseline · Widely available
The string type (and String object) represents a sequence of characters.
Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Jul 29, 2015. Widely available since Jan 29, 2018.
Browser support
DesktopChrome
1+Supportedsince Dec 11, 2008
Current: 155Edge
12+Supportedsince Jul 29, 2015
Current: 154Firefox
1+Supportedsince Nov 9, 2004
Current: 157Safari
1+Supportedsince Jun 23, 2003
Current: 27MobileChrome Android
18+Supportedsince Jun 27, 2012
Current: 155Firefox Android
4+Supportedsince Mar 29, 2011
Current: 157Safari iOS
1+Supportedsince Jun 29, 2007
Current: 27How to use
This feature is Baseline widely available — use it freely, no fallback needed.
Example
Full syntax and examples are on MDN: String.
Feature detection
JS · check before using
if (typeof String !== "undefined") {
// String is available
}Documentation (MDN)
Specification
Sub-features
Support for each part of the feature (23). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| String | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.@@iterator | 38 | 12 | 36 | 9 | 38 | 36 | 9 |
| String.String | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.charAt | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.charCodeAt | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.concat | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.fromCharCode | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.indexOf | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.lastIndexOf | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.length | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.match | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.replace | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.search | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.slice | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.split | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.substring | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.toLowerCase | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.toString | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.toUpperCase | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| String.trim | 4 | 12 | 3.5 | 5 | 18 | 4 | 5 |
Show 3 more
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| String.unicode_code_point_escapes | 1 | 12 | 40 | 1 | 18 | 40 | 1 |
| String.valueOf | 1 | 12 | 1 | 1 | 18 | 4 | 1 |
| string_literals | 1 | 12 | 1 | 1 | 18 | 4 | 1 |