The Javascript handler ownKeys() method gives an enum object in return.
Syntax:
ownKeys: function(target)
Parameters:
target: It represents the target object.
Return:
An enumerable object.
Example:
<!DOCTYPE html>
<html>
<body>
<script>
var handler = new Proxy({}, {
ownKeys: function(a) {
document.writeln(" My favourite fruits are: ");
return ['apple', 'mango', 'and orange.'];
}});
document.writeln(Object.getOwnPropertyNames(handler));
</script>
</body>
</html>