The JavaScript array every() method is used to determine whether all the elements of an array are satisfying the provided function conditions.
Syntax:
array.every (callback (currentValue, 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:
Return true if all the elements of an array satisfy the specified conditions else return true.
Example:
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<script>
var a = ["GOLD","SILVER","DIAMOND","RUBY","PLATINUM"]
function check(value)
{
return value == "RUBY";
}
document.writeln(a.every(check));
</script>
</body>
</html>