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ArrayBuffer.byteLength Property in JavaScript
ArrayBuffer object in JavaScript represents a fixed-length binary data buffer.The byteLength property of the ArrayBuffer returns an unsigned, 32-bit integer that specifies the size/length of the ArrayBuffer.
Syntax
Its syntax is as follows
array.byteLength
Example
Try the following example.
<html>
<head>
<title>JavaScript Example</title>
</head>
<body>
<script type="text/javascript">
var arrayBuffer = new ArrayBuffer(8);
var result = arrayBuffer.byteLength;
document.write("length of the array buffer is: " + result);
</script>
</body>
</html>Output
length of the array buffer is: 8
Example
You can also create an array buffer object by passing a string value and get its length as in the following example. Since here we haven’t passed any size value it returns 0 −
<html>
<head>
<title>JavaScript Example</title>
</head>
<body>
<script type="text/javascript">
var obj = new ArrayBuffer("Hi welcome to Tutorialspoint");
var byteLength = obj.byteLength;
document.write(byteLength);
</script>
</body>
</html>Output
0
Errors
While creating an ArrayBuffer you cannot use negative values, complex numbers and, the size should be not more than 253 else this functions generates an error.
Size more than 253
<html> <head> <title>JavaScript Example</title> </head> <body> <script type="text/javascript"> var obj = new ArrayBuffer(9007199254740995); var byteLength = obj.byteLength; document.write(byteLength); </script> </body> </html>
Output
Error: Array buffer allocation failed
Size with a complex number
<html> <head> <title>JavaScript Example</title> </head> <body> <script type="text/javascript"> var obj = new ArrayBuffer(2+3i); var byteLength = obj.byteLength; console.log(byteLength); </script> </body> </html>
Output
Error: Invalid or unexpected token
Size with a negative value
<html> <head> <title>JavaScript Example</title> </head> <body> <script type="text/javascript"> var obj = new ArrayBuffer(-72); var byteLength = obj.byteLength; console.log(byteLength); </script> </body> </html>
Output
Error: Invalid array buffer length
Updated on: 25-Jun-2020
385 Views
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