String.lastIndexOf
lastIndexOf($substring, $options = {}) -> number
Description
Find the position of a substring, starting at the end of the string.
If the substring does not exist, it will return 0.
'one fish two fish'.lastIndexOf('one')
//= 1
'one fish two fish'.lastIndexOf('fish')
//= 14 ^
'one fish two fish'.lastIndexOf('bird')
//= 0
Options
| Option | Value | Description |
|---|---|---|
ignoreCase |
true/false | Match upper and lowercase versions of each character. |
startAt |
number | Start at index position (default: 1) |
'one fish two fish'.lastIndexOf('Two Fish', -ignoreCase)
//= 10 ^
'one fish two fish'.lastIndexOf('Fish', { ignoreCase, startAt: 10 })
//= 14 ^