JavaScript TypedArray findIndex() Method

The JavaScript findIndex() method provides the index of the first element in the array that completes the given test. If the test is not satisfied, it will return -1.

findIndex() does not execute the function for array elements without values.
findIndex() does not change the original array.

Syntax:

Parameters:

Value: The value of the current element.

Index: The array index of the current element.

Arr: The array object on which the findIndex() method operated.

ThisValue: A value to be passed to the function to be used as its "this" value. If the parameter is empty, the value "undefined" will be passed as its "this" value.

Return value:

Index of the array element, otherwise it returns -1.

Browser Support:

Chrome	45.0
Edge	7.1
Firefox	25.0
Opera	32.0

Example 1

JavaScript TypedArray findIndex() Method

<script type="text/javascript">
// JavaScript to illustrate findIndex() method
function JavaTpoint(value)
{
return value >34;
}
 // Input array
var arr = [1,2,3,4,5,6,7,8,9,12,11,14];
var result = arr.findIndex(JavaTpoint);
document.write(result)// expected output: arr[Output:-1] 
</script> 

Test it Now

Output:

-1

Example 2

JavaScript TypedArray findIndex() Method

<script type="text/javascript">
//JavaScript to illustrate findIndex() method
function JavaTpoint(value)
{
return value ==6;
}
 // Input array
var arr = [1,2,3,4,5,6,7,8,9,12,11,14];
var result = arr.findIndex(JavaTpoint);
document.write(result) 
// expected output: arr[Output:5]
</script> 

Test it Now

Output:

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