Javascript String Functions
The strings in Javascript are actually objects with a bunch of properties and functions that can be accessed .The javascript String object is used to manipulate a stored piece of text.
What’s a String Function
The string’s functions used to find out more about your string. For example, the string function search lets you search a string for a specified value that you supply.
It is important to note that these functions do not actually change the string itself, rather it returns a new string that you will have to store if you want to use it elsewhere.
What’s a String Property?
A property is just some basic information about the object. For example, a string object has a length property which stores the number of characters in the string.
String Methods and Properties
The following lessons will teach you how to manipulate, count, reorder, replace, search and do just about anything else to your Javascript strings. These advanced topics will open up a whole new world of choices for the dynamic web pages you have yet to build!
| Method | Description | |
|---|---|---|
| anchor() | Creates an HTML anchor | |
| big() | Displays a string in a big font | |
| blink() | Displays a blinking string | |
| bold() | Displays a string in bold | |
| charAt() | Returns the character at a specified position | |
| charCodeAt() | Returns the Unicode of the character at a specified position | |
| concat() | Joins two or more strings | |
| fixed() | Displays a string as teletype text | |
| fontcolor() | Displays a string in a specified color | |
| fontsize() | Displays a string in a specified size | |
| fromCharCode() | Takes the specified Unicode values and returns a string | |
| indexOf() | Returns the position of the first occurrence of a specified string value in a string | |
| italics() | Displays a string in italic | |
| lastIndexOf() | Returns the position of the last occurrence of a specified string value, searching backwards from the specified position in a string | |
| link() | Displays a string as a hyperlink | |
| match() | Searches for a specified value in a string | |
| replace() | Replaces some characters with some other characters in a string | |
| search() | Searches a string for a specified value | |
| slice() | Extracts a part of a string and returns the extracted part in a new string | |
| small() | Displays a string in a small font | |
| split() | Splits a string into an array of strings | |
| strike() | Displays a string with a strikethrough | |
| sub() | Displays a string as subscript | |
| substr() | Extracts a specified number of characters in a string, from a start index | |
| substring() | Extracts the characters in a string between two specified indices | |
| sup() | Displays a string as superscript | |
| toLowerCase() | Displays a string in lowercase letters | |
| toUpperCase() | Displays a string in uppercase letters | |
| toSource() | Represents the source code of an object | |
| valueOf() | Returns the primitive value of a String object |
String Object Properties
| Property | Description | |
|---|---|---|
| constructor | A reference to the function that created the object | |
| length | Returns the number of characters in a string | |
| prototype | Allows you to add properties and methods to the object |