The Atomic object of JavaScript is an object and which provides atomic operations such as add, sub, and, or, xor, load, store etc. as static methods, these methods are used with SharedArrayBuffer objects.
The sub() function of the atomic object accepts a number and the position, subtracts the given number from the number in the given position and it returns the value of the number in the old position.
Syntax
Its syntax is as follows.
Atomics.sub()
Example
<html> <head> <title>JavaScript Example</title> </head> <body> <script type="text/javascript"> var arrayBuffer = new SharedArrayBuffer(16); var data = new Uint8Array(arrayBuffer); data[0] = 30; Atomics.sub(data, 0, 10); document.write(Atomics.load(data, 0)); </script> </body> </html>
Output
20
Example
<html>
<head>
<title>JavaScript Example</title>
</head>
<body>
<script type="text/javascript">
var arrayBuffer = new SharedArrayBuffer(16);
var data = new Uint8Array(arrayBuffer);
data[0] = 30;
document.write("Previous: "+Atomics.sub(data, 0, 10));
document.write("<br>");
document.write("Result: "+Atomics.load(data, 0));
document.write("<br>");
document.write("Previous: "+Atomics.sub(data, 0, 5));
document.write("<br>");
document.write("Result: "+Atomics.load(data, 0));
</script>
</body>
</html>Output
Previous: 30 Result: 20 Previous: 20 Result: 15