The JavaScript array findIndex() method is used to return the index value of the first element in the given array that satisfies the specified condition.
Syntax:
array.findIndex (callback (value,index,arr), thisArg)
array.findIndex (callback (value,index,arr), thisArg)
array.findIndex (callback (value,index,arr), thisArg)
Parameters:
callback: It represents the method to test the condition. It is required.
currentValue: It represents the array’s current element. It is required.
index: Current element index. It is optional.
arr: It represents the array on which every() method is to be invoked. It is optional.
thisArg: It is used as this keyword while executing callback. It is optional.
Returns:
Array’s first element that satisfies the function condition.
Example:
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<script>
var a = ["GOLD","SILVER","DIAMOND","RUBY","PLATINUM"]
var result=a.findIndex(x=> x>"GOLD");
document.writeln(result)
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<script>
var a = ["GOLD","SILVER","DIAMOND","RUBY","PLATINUM"]
var result=a.findIndex(x=> x>"GOLD");
document.writeln(result)
</script>
</body>
</html>
<!DOCTYPE html> <html> <head> </head> <body> <script> var a = ["GOLD","SILVER","DIAMOND","RUBY","PLATINUM"] var result=a.findIndex(x=> x>"GOLD"); document.writeln(result) </script> </body> </html>