Name

String — support for strings

Inherits from

Object → String

Constructor

new String(s) // Constructor function
String(s)     // Conversion function

Arguments

s

The value to be stored in a String object or converted to a primitive string.

Returns

When String() is used as a constructor with the new operator, it returns a String object, which holds the string s or the string representation of s. When the String() constructor is used without the new operator, it simply converts s to a primitive string and returns the converted value.

Properties

length

The number of characters in the string.

Methods

charAt()

Extracts the character at a given position from a string.

charCodeAt()

Returns the encoding of the character at a given position in a string.

concat()

Concatenates one or more values to a string.

indexOf()

Searches the string for a character or substring.

lastIndexOf()

Searches the string backward for a character or substring.

localeCompare()

Compares strings using locale-specific ordering.

match()

Performs pattern matching with a regular expression.

replace()

Performs a search-and-replace operation with a regular expression.

search()

Searches a string for a substring that matches a regular expression.

slice()

Returns a slice or substring of a string.

split()

Splits a string into an array of strings, breaking at a specified delimiter string or regular expression.

substr()

Extracts a substring of a string; a variant of substring().

substring()

Extracts a substring of a string.

toLowerCase()

Returns a copy of the string, with ...

Get JavaScript: The Definitive Guide, 6th Edition now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.