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JavaScript String includes() Method

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JavaScript String includes() Method

The includes() method returns a Boolean value indicates whether one string may be found within another string.

Note: This method is case sensitive.

Example

HTML Online Editor
<!DOCTYPE html> <html> <body> <script> var str = "Hello there my old friend" var result = str.includes("fri"); document.write(result); </script> </body> </html>

Syntax

str.includes(searchString, startFrom)

Parameter Values

ValueTypeExplanation
searchString Required Specifies the characters to be searched for within this string.
startFrom optional Specifies the starting position of a string (str).
If omitted, the default value is '0'.

Return Values

ValueExplanation
true If the search string is found anywhere within the given string.
false If the search string is not found anywhere within the given string.

Browser Support

Devicedesktopmobileserver
Browser / PLgoogle chromesafarifirefoxinternet Exploreredgeoperagoogle chromesafarifirefoxedgeoperaandroid webviewsamsung internetnodejs
includes()YesYesYesYesYesYesYesYesYesYesYesYesYesYes

includes() with Specified Starting Position

Example

HTML Online Editor
<!DOCTYPE html> <html> <body> <script> var str = "Hello there my old friend" //str = "e my old friend" var result = str.includes("Hello", 10); document.write(result); </script> </body> </html>

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