The indexOf() method returns the position of the first occurrence of a specified string value in a string.
fromindex Optional. Specifies where to start the search
Tips and Notes
Note: The indexOf() method is case sensitive!
Note: This method returns -1 if the string value to search for never occurs.
Example
In this example we will do different searches within a "Hello world!" string:
0
-1
6
Final code and demo is here
Demo
stringObject.indexOf(searchvalue,fromindex)searchvalue Required. Specifies a string value to search for
fromindex Optional. Specifies where to start the search
Tips and Notes
Note: The indexOf() method is case sensitive!
Note: This method returns -1 if the string value to search for never occurs.
Example
In this example we will do different searches within a "Hello world!" string:
<script type="text/javascript">The output of the code above will be:
var str="Hello world!";
document.write(str.indexOf("Hello") + "<br />");
document.write(str.indexOf("World") + "<br />");
document.write(str.indexOf("world"));
</script>
0
-1
6
Final code and demo is here
Demo
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