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JavaScript Array lastIndexOf() Method
JavaScript Array lastIndexOf() Method
JavaScript array lastIndexOf() method is used to find the index of the last occurrence at which a given element can be found in the array. In other words, it search the position of a particular element in a given array. It is case sensitive. It returns -1, if an element is not present in a string.
Syntax:array.lastIndexOf(item, start)
Parameter Values
| Parameter | Description |
|---|---|
| item | It Required the item which is searched |
| start | It is optional. It represents the element at which position in the array to start the search. Basically, the Negative values will start at the given position counting from the end, and search to the beginning. |
Browser Support
| Method | Chrome | Edge | Firefox | Safari | Opera |
|---|---|---|---|---|---|
| lastIndexOf() | Yes | 9.0 | Yes | Yes | Yes |
<html>
<body>
<button onclick="myLastindOf()">Click me</button>
<p id="lastin"></p>
<script>
function myLastindOf()
{
var z = ["AB", "BA", "CD", "DC"];
var a = z.lastIndexOf("CD");
var b = document.getElementById("lastin");
b.innerHTML = a;
}
</script>
</body>
</html>
Output:
Example 2:
<html>
<body>
<script>
function lastindex()
{
var array = [2, 76, 25, 45];
document.write(array.lastIndexOf(45,2));
}
lastindex();
</script>
</body>
</html>
Output:
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