Thursday, March 10, 2016

JavaScript Strings

Thursday, March 10, 2016 Posted by Sandeep Kumar Jha

JavaScript strings are used for storing and manipulating text.

A JavaScript string simply stores a series of characters like "John Doe".


A string can be any text inside quotes. You can use single or double quotes:


String Length
The length of a string is found in the built in property length:

Example


Special Characters

Because strings must be written within quotes, JavaScript will misunderstand this string:

Example


String Methods

Method
Description
charAt()
Returns the character at the specified index (position)
charCodeAt()
Returns the Unicode of the character at the specified index
concat()
Joins two or more strings, and returns a copy of the joined strings
fromCharCode()
Converts Unicode values to characters
indexOf()
Returns the position of the first found occurrence of a specified value in a string
lastIndexOf()
Returns the position of the last found occurrence of a specified value in a string
localeCompare()
Compares two strings in the current locale
match()
Searches a string for a match against a regular expression, and returns the matches
replace()
Searches a string for a value and returns a new string with the value replaced
search()
Searches a string for a value and returns the position of the match
slice()
Extracts a part of a string and returns a new string
split()
Splits a string into an array of substrings
charAt() Example



charCodeAt() Example


concat() Example



lastIndexOf() Example