Ø big()
· This function will display the string in a big font.
Syntax : stringobject.big()
Ø small()
· This function will display the string in a small font.
Syntax : stringobject.small()
Ø bold()
· This function will display the string in a bold style.
Syntax : stringobject.bold()
Ø italics()
· This function will display the string in a italic style.
Syntax : stringobject.italics()
Ø strike()
· This function will strike out the string. Which means the line will be drawn from between the text.
Syntax : stringobject.strike()
Example
<html>
<head>
<script language="javascript">
var str="Hello World ";
document.write(str.big()+"<br/>");
document.write(str.small()+"<br/>");
document.write(str.bold()+"<br/>");
document.write(str.italics()+"<br/>");
document.write(str.strike()+"<br/>");
</script>
</head>
</html>
Ø fontcolor()
· The fontcolor() method is used to display a string in a specified color.
Syntax : stringobject.fontcolor(color)
Parameter | Description |
Color | Required. Specifies a font-color for the string. The value can be a color name(red). An RGB value (rgb(255,0,0)) or a hex number (#FFOOOO) |
Example
<html>
<head>
<script language="javascript">
var s = "Hello World";
document.write(s.fontcolor('blue')+"<br/>");
document.write(s.fontcolor('rgb(255,0,0)')+"<br/>");
document.write(s.fontcolor('#ffoo11'));
</script>
</head>
</html>
Ø fontsize()
· The fontsize() method is used to display a string in a specified size.
Syntax : stringobject.fontsize(size)
Parameter | Description |
Size | Required. A number that specifies the font size. Range 1 to 7. |
Example
<html>
<head>
<script language="javascript">
var s = "Hello World";
document.write(s.fontsize(5)+"<br/>");
</script>
</head>
</html>
Ø link()
· The link() method is used to display a string as a hyperlink.
Syntax : stringobject.link(stringurl)
Example
<html>
<head>
<script language="javascript">
var s = "Click Here";
document.write(s.link("str_fontcolor.html")+"<br/>");
</script>
</head>
</html>
Ø charAt()
· The charAt() method returns the character at a specified position.
· The first character in the string is at position 0.
Syntax : stringobject.charAt(index)
Parameter | Description |
Index | Required. A number representing a position in the string. |
Example
<html>
<head>
<script language="javascript">
var str = "Hello World";
document.write(str.charAt(0));
</script>
</head>
</html>
Output
H
Ø concat()
· The concat() method is used to join two or more string.
Syntax : stringobject.concat(string1,string2……….stringn)
Parameter | Description |
Stringn | Required. One or more string objects to be joined to a string. |
Example
<html>
<head>
<script language="javascript">
var str1 = "Hello";
var str2 = “world”;
document.write(str.concat(str2));
</script>
</head>
</html>
Output
Hello World
Ø indexOf()
· The indexOf() method returns the position of the first occurrence of a specified string value in a string.
· The indexOf() method is case sensitive.
· This method returns -1 if the string value to search for never occurs.
Syntax : stringobject.indexOf(searchvalue,[fromindex])
Parameter | Description |
Searchvalue | Required. Specified a string value to search for |
Fromindex | Optional. Specifies where to start the search |
Example
<html>
<head>
<script language="javascript">
var str = "Hello World";
document.write(str.indexOf("Hello")+"<br/>");
document.write(str.indexOf("world"));
</script>
</head>
</html>
Output
0
-1
Ø lastIndexOf()
· The lastIndexOf() method returns the position of the last occurrence of a specified string value in a string.
· This function is case sensitive.
· It returns -1 if the search is not found.
Syntax : stringobject.lastIndexOf(searchvalue,[fromindex])
Parameter | Description |
Searchvalue | Required. Specified a string value to search for |
Fromindex | Optional. Startindex parameter accepts the integer value to specify the start position for the lastIndexOf() function. |
Example
<html>
<head>
<script language="javascript">
var str = "Hello World";
var str = "Hello World";
document.write(str.lastIndexOf("l")+"<br/>");
</script>
</head>
</html>
Output
9
Ø replace()
· The replace() method is used to replace some characters with some other character in a string.
· The replace() method is case sensitive.
Syntax : stringobject.replace(findstring,newstring)
Parameter | Description |
Findstring | Required. Specified a string value to find. To perform a global search add a ‘g’ flag to this parameter and to perform a case insensitive search add an ‘I’ flag. |
Newstring | Required. Specifies the string to replace the found value from findstring. |
Example
<html>
<head>
<script language="javascript">
var str = "Hello World";
document.write(str1.replace(/Hello/,"Hi")+"<br/>");
document.write(str1.replace(/hello/,"Hi")+"<br/>");
document.write(str1.replace(/hello/i,"Hi")+"<br/>");
</script>
</head>
</html>
Output
Hi World
Hello World
Hi World
Ø search()
· The search() method is used to search a string for a specified value.
· search() is case sensitive
· The search() method returns the position of the specified value in the string. If no match was found it returns -1.
Syntax : stringobject.search(searchstring)
Parameter | Description |
Searchstring | Required. The value to search for in a string. To perform a case insensitive search add an ‘I’ flag. |
Example
<html>
<head>
<script language="javascript">
var str = "Hello World";
document.write(str.search(/World/)+"<br/>");
document.write(str.search(/world/)+"<br/>");
document.write(str.search(/World/i)+"<br/>");
</script>
</head>
</html>
Output
6
-1
6
Ø substr()
· The substr() method extract a specified number of character in a string, from a start index.
· To extract character from the end of the end of the string. Use a negative start number.
· The start index is 0.
· If the length parameter is omitted, this method extract to the end of the string.
Syntax : stringobject.substr(start,[length])
Parameter | Description |
Start | Required. Where to start the extraction. Must be a numeric value. |
Length | Optional. How many character to extract. Must be a numeric value. |
Example
<html>
<head>
<script language="javascript">
var str = "Hello World";
document.write(str.substr(3)+"<br/>");
document.write(str.substr(3,2)+"<br/>");
</script>
</head>
</html>
Output
lo world
lo
Ø substring()
· The substring() method extract the character in a string between two specified indices.
· To extract character from the end of the string. Use a negative start number.
· The start index at 0.
· If the stop parameter is omitted, this method extracts to the end of the string.
Syntax : stringobject.substring(start,[stop])
Parameter | Description |
Start | Required. Where to start the extraction. Must be a numeric value. |
Length | Optional. Where to stop the extraction. Must be a numeric value. |
Example
<html>
<head>
<script language="javascript">
var str = "Hello World";
document.write(str.substring(3)+"<br/>");
document.write(str.substring(3,7)+"<br/>");
</script>
</head>
</html>
Output
lo World
lo W
Ø toLowerCase()
· The toLowerCase() method is used to display a string in lowercase letters.
Syntax : stringobject.toLowerCase()
Example
<html>
<head>
<script language="javascript">
var str = "Hello World";
document.write(str.toLowerCase());
</script>
</head>
</html>
Output
hello world
Ø toUpperCase()
· The toUpperCase() method is used to display a string in uppercase letters.
Syntax : stringobject.toUpperCase()
Example
<html>
<head>
<script language="javascript">
var str = "Hello World";
document.write(str.toUpperCase());
</script>
</head>
</html>
Output
HELLO WORLD
Ø length()
· The length property returns the number of character in a string.
Syntax : stringobject.length
Example
<html>
<head>
<script language="javascript">
var str = "Hello World";
document.write(str.length);
</script>
</head>
</html>
Output
11
Posted By : Hemangi Zala
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