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Returns the index within the calling String object of the first occurrence of the specified value, starting the search at fromIndex, or -1 if the value is not found.
Method of String
Syntax
indexOf( searchValue[, fromIndex] )
Parameters
| Parameter | Description |
|---|---|
| searchValue | A string representing the value to search for. |
| fromIndex | The location within the calling string to start the search from. It can be any integer between 0 and the length of the string. The default value is 0. |
Description
Characters in a string are indexed from left to right. The index of the first character is 0, and the index of the last character of a string called stringName is stringName.length - 1.
The indexOf method is case sensitive. For example, the following expression returns -1: