Chapter 4 Strings

JavaScript strings share many similarities with string implementations from other high-level languages. They represent text-based messages and data. In this course, we will cover the basics. How to create new strings and perform common operations on them.

Here is an example of a string:

"Hello World"

String indexes are zero-based, meaning that starting position of the first character at 0 followed by others in incremental order. Various methods are supported by string and return a new value. These methods are described below.

Name	Description
`charAt()`	Returns character at specified index
`charCodeAt()`	Returns Unicode character at specified index
`concat()`	Returns two or more combined strings
`constructor`	Returns string's constructor function
`endsWith()`	Checks if a string ends with a specified value
`fromCharCode()`	Returns Unicode values as characters
`includes()`	Checks if a string contains with a specified value
`indexOf()`	Returns the index of its first occurrence
`lastIndexOf()`	Returns the index of its last occurrence
`length`	Returns the length of the string
`localeCompare()`	Compares two strings with locale
`match()`	Matches a string against a value or regular expression
`prototype`	Used to add properties and method of an object
`repeat()`	Returns new string with number of copies specified
`replace()`	Returns a string with values replaced by a regular expression or a string with a value
`search()`	Returns an index based on a string's match against a value or regular expression
`slice()`	Returns a string containing part of a string
`split()`	Splits string into array of substrings
`startsWith()`	Checks strings beginning against specified character
`substr()`	Extracts part of string, from start index
`substring()`	Extracts part of string, between two indices
`toLocalLowerCase()`	Returns string with lowercase characters using host's locale
`toLocalUpperCase()`	Returns string with uppercase characters using host's locale
`toLowerCase()`	Returns string with lowercase characters
`toString()`	Returns string or string object as string
`toUpperCase()`	Returns string with uppercase characters
`trim()`	Returns string with removed whitespaces
`trimEnd()`	Returns string with removed whitespaces from end
`trimStart()`	Returns string with removed whitespaces from start
`valueOf()`	Returns primitive value of string or string object

Strings

Chapter 4

Strings

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