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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