- ES6 Tutorial
- ES6 - Home
- ES6 - Overview
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- ES6 - Symbol
- ES6 - New String Methods
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ES6 - Strings
The String object lets you work with a series of characters; it wraps JavaScript’s string primitive data type with a number of helper methods.
As JavaScript automatically converts between string primitives and String objects, you can call any of the helper methods of the String object on a string primitive.
Use the following syntax to create a String object.
var val = new String(string);
The string parameter is a series of characters that has been properly encoded. String.
String Properties
Following is a list of the properties of String object and its description.
| Sr.No | Property & Description |
|---|---|
| 1 | constructor
Returns a reference to the String function that created the object . |
| 2 | length
Returns the length of the string. |
| 3 | Prototype
The prototype property allows you to add properties and methods to an object . |
String Methods
Here is a list of the methods available in String object along with their description.
| Sr.No | Method & Description |
|---|---|
| 1 | charAt()
Returns the character at the specified index. |
| 2 | charCodeAt()
Returns a number indicating the Unicode value of the character at the given index. |
| 3 | concat()
Combines the text of two strings and returns a new string. |
| 4 | indexOf()
Returns the index within the calling String object of the first occurrence of the specified value, or -1 if not found. |
| 5 | lastIndexOf()
Returns the index within the calling String object of the last occurrence of the specified value, or -1 if not found. |
| 6 | localeCompare()
Returns a number indicating whether a reference string comes before or after or is the same as the given string in a sorted order. |
| 7 | match()
Used to match a regular expression against a string. |
| 8 | replace()
Used to find a match between a regular expression and a string, and to replace the matched substring with a new substring. |
| 9 | search()
Executes the search for a match between a regular expression and a specified string. |
| 10 | slice()
Extracts a section of a string and returns a new string. |
| 11 | split()
Splits a String object into an array of strings by separating the string into substrings. |
| 12 | substr()
Returns the characters in a string beginning at the specified location through the specified number of characters. |
| 13 | substring()
Returns the characters in a string between two indexes into the string. |
| 14 | toLocaleLowerCase()
The characters within a string are converted to lower case while respecting the current locale. |
| 15 | toLocaleupperCase()
The characters within a string are converted to uppercase while respecting the current locale. |
| 16 | toLowerCase()
Returns the calling string value converted to lowercase. |
| 17 | toString()
Returns a string representing the specified object. |
| 18 | toUpperCase()
Returns the calling string value converted to uppercase. |
| 19 | valueOf()
Returns the primitive value of the specified object. |