Javascript Every() Function

The every() function of array object tests whether all elements in the array pass the test implemented by the provided function. Use it for example to test if all values within an array is greater than 0.

Syntax

array1.every(callbackfn[, thisArg])

Javascript Every() Function Example1

<html>
<head>
<script type="text/javascript">
function chechAllElementGreaterThanZero(element, index, array) {
  return element >= 10;
}
document.write([12, 5, 8, 130, 44].every(chechAllElementGreaterThanZero));
document.write([10, 20, 22, 130, 44].every(chechAllElementGreaterThanZero));
</script>
</head>
<body>
</body>
</html>

This will produce following result

false
true

Javascript Every() Function Example2

<html>
<head>
<script type="text/javascript">

function CheckNumberIfEven(value, index, ar) {
    document.write(value + " ");
    if (value % 2 == 0)
        return true;
    else
        return false;
}

// Create an array.
var numbers = [2, 4, 5, 6, 8];

// Check whether the callback function returns true for all of the
// array values.
if (numbers.every(CheckNumberIfEven))
    document.write("All are even.");
else
    document.write("All are not even.");
</script>
</head>
<body onLoad="showConcate()">
</body>
</html>

This will produce following result