Widely available Supported across all major browsers. Safe to use in production.

String startsWith() and endsWith()

The endsWith() method of String values determines whether a string ends with the characters of this string, returning true or false as appropriate.

Strings

Browser support

Feature Desktop Mobile
Chrome
Edge
Firefox
Safari
Chrome Android
Safari iOS
javascript.builtins.String.endsWith
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12
17
9
36
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Built-in object
String.startsWith

The startsWith() method of String values determines whether this string begins with the characters of a specified string, returning true or false as appropriate.
41
12
17
9
36
9
1+Supported (version) Not supported ※Has note Sub-feature descriptions sourced from MDN Web Docs (CC BY-SA 2.5)

Syntax

JAVASCRIPT 
const filename = 'document.pdf';

filename.startsWith('doc');  // true
filename.endsWith('.pdf');   // true
filename.endsWith('.txt');   // false

Live demo

fileextendedchild. check

EndsWith Use, filename that specific. extendedchild in end or inspect it..

PreviewFullscreen

URL ski-mu. check

start or inspect it.. with StartsWith Use, URL that https://.

PreviewFullscreen

classification with prefix.

ID etc. String that specific. prefix in start or check..

PreviewFullscreen

Use cases

  • Using String startsWith() and endsWith()

    The endsWith() method of String values determines whether a string ends with the characters of this string, returning true or false as appropriate.

Cautions

  • No specific concerns. Stable across all major browsers.

Accessibility

  • When updating the DOM dynamically, announce important changes to assistive technology with aria-live regions.

Related links