String Object Properties
Property |
Description |
constructor |
Returns the function that created the String object's prototype |
length |
Returns the length of a string |
prototype |
Allows you to add properties and methods to an object |
String Object Methods
Method |
Description |
charAt() |
Returns the character at the specified index |
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 |
match() |
Searches for a match between a regular expression and a string,
and returns the matches |
replace() |
Searches for a match between a substring (or regular
expression) and a string, and replaces the matched substring with a new
substring |
search() |
Searches for a match between a regular expression and a string,
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 |
substr() |
Extracts the characters from a string, beginning at a specified start
position, and through the specified number of character |
substring() |
Extracts the characters from a string, between two specified indices |
toLowerCase() |
Converts a string to lowercase letters |
toUpperCase() |
Converts a string to uppercase letters |
valueOf() |
Returns the primitive value of a String object |
String HTML Wrapper Methods
The HTML wrapper methods return the string wrapped inside the appropriate
HTML tag.
Method |
Description |
anchor() |
Creates an anchor |
big() |
Displays a string using a big font |
blink() |
Displays a blinking string |
bold() |
Displays a string in bold |
fixed() |
Displays a string using a fixed-pitch font |
fontcolor() |
Displays a string using a specified color |
fontsize() |
Displays a string using a specified size |
italics() |
Displays a string in italic |
link() |
Displays a string as a hyperlink |
small() |
Displays a string using a small font |
strike() |
Displays a string with a strikethrough |
sub() |
Displays a string as subscript text |
sup() |
Displays a string as superscript text |
ExamplesConvert to upper case: <script type="text/javascript">
var str="Hello world!";
document.write(str.toUpperCase());
</script>
Get the number of characters in String <script type="text/javascript">
var txt="Hello World!";
document.write(txt.length);
</script>
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