Javascript Reference - JavaScript String lastIndexOf() Method
lastIndexOf() searches a string and return the position.
It returns -1 if the substring isn't found.
lastIndexOf() method does the search from the end of the string.
var stringValue = "hello world";
console.log(stringValue.lastIndexOf("o")); //7
The code above generates the following result.
Browser Support
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lastIndexOf() |
Yes | Yes | Yes | Yes | Yes |
Syntax
stringObject.lastIndexOf(searchvalue, start) ;
Parameter Values
| Parameter | Description |
|---|---|
| searchvalue | Required. The string to search for |
| start | Optional. Where to start searching backwards. The default value is the length of the string |
Return Value
Return the last index of searchvalue in the string.
Or -1 if not found.
Start from middle
An optional second argument tells where to start with.
var stringValue = "hello world";
console.log(stringValue.lastIndexOf("o", 6)); //4
The code above generates the following result.
