JavaScript substr() Method
 JavaScript String Object
Definition and Usage
The substr() method extracts a specified number of characters from a string,
and returns the new string.
Syntax
| stringObject.substr(start,length) |
| Parameter |
Description |
| start |
Required. Where to start the extraction. Must be a numeric
value. Starts at 0 |
| length |
Optional. An integer that defines how many characters to extract.
If omitted, substr() extracts to the end of the string |
Tips and Notes
Tip: To extract characters from the end of the string, use a negative start number (This does not work in IE).
Example
Example
Extract some characters from a string:
<script type="text/javascript">
var str="Hello world!";
document.write(str.substr(3)+"<br />");
document.write(str.substr(3,4));
</script>
|
The output of the code above will be:
Try it yourself »
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JavaScript String Object
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