JavaScript | arrayBuffer.byteLength property
The arrayBuffer.byteLength is a property in JavaScript which return the length of an ArrayBuffer in byte. ArrayBuffer is an object which is used to represent fixed-length binary data.
Difference between property and function in javascript.
Property in JavaScript is nothing but a value whereas method is a function this can be understood with the help of a example given below.
javascript
// car is an object.var car = {};// car.name is a property of the given object.car.name = "Audi",// car.sayModel is a function of the given object.car.sayModel = function() {console.log("A8");} // printing property value.console.log(car.name);// printing function called value.console.log(car.sayModel()); |
Output:
> "Audi" > "A8"
Here as we can see that property of the object car, is going to store the string as “Audi” and it can be accessed with car.name.
sayModel is a method i.e, a function of the object and it can be accessed with car.sayModel().
It can be noticed that sayModel is just a function which uses ().
Difference between bytelength and length property-
Length property returns the length of a String object i.e, number of characters in the string object.
Example:
Input:- geeksforgeeks Output:- 13
Bytelength property returns the length of an ArrayBuffer in byte. ArrayBuffer is an object which is used to represent fixed-length binary data.
Example:
Input:- ArrayBuffer(2) Output:- 2
Syntax:
arraybuffer.byteLength
Let’s see JavaScript program on this property:
Code #1:
javascript
// ArrayBuffer is created with// some size in bytes.var A = new ArrayBuffer(2);// Here the byteLength property// is used for checking the size.var B = A.byteLength;// Length of the ArrayBuffer in bytes is printed.console.log(B); |
Output:
> 2
Code #2:
javascript
// ArrayBuffer is created// with some size in bytes.var A = new ArrayBuffer(0);// Here the byteLength property// is used for checking the size.var B = A.byteLength;// Length of the ArrayBuffer// in bytes is printed.console.log(B); |
Output:
> 0
Code #3:
javascript
// ArrayBuffer is created// with some size in bytes.var A = new ArrayBuffer("geeksforgeeks");// Here the byteLength property is// used for checking the size.var B = A.byteLength;// Length of the ArrayBuffer// in bytes is printed.console.log(B); |
Output:
> 0
Code #4:
javascript
// ArrayBuffer is created// with some size in bytes.var A = new ArrayBuffer(4.6);// Here the byteLength property// is used for checking the size.var B = A.byteLength;// Length of the ArrayBuffer// in bytes is printed.console.log(B); |
Output:
> 4
Negative number can not be taken as the sizes in byte only positive integer value can be taken including zero.
javascript
// ArrayBuffer is created// with some size in bytes.var A = new ArrayBuffer(-2);// Here the byteLength property is// used for checking the size.var B = A.byteLength;// Length of the ArrayBuffer// in bytes is printed.console.log(B); |
Output:
Error: Invalid array buffer length
Complex number can not be taken as the sizes in byte only positive integer value can be taken including zero.
javascript
// ArrayBuffer is created with// some size in bytes.var A = new ArrayBuffer(2 + 4i);// Here the byteLength property// is used for checking the size.var B = A.byteLength;// Length of the ArrayBuffer// in bytes is printed.console.log(B); |
Output:
Error: Invalid or unexpected token
The sizes in byte should must be less then 
otherwise it returns Error: Invalid array buffer length.
javascript
// ArrayBuffer is created with some size in bytes.var A = new ArrayBuffer(2338945720394852703948572);// Here the byteLength property is// used for checking the size.var B = A.byteLength;// Length of the ArrayBuffer in bytes is printed.console.log(B); |
Output:
Error: Invalid array buffer length
Application:
Its application is to get the length of an ArrayBuffer in byte.
- Code #1:
javascript
// ArrayBuffer is created// with some size in bytes.var A = new ArrayBuffer(23);// Here the byteLength property// is used for checking the size.var B = A.byteLength;// Length of the ArrayBuffer// in bytes is printed.console.log(B); |
- Output:
> 23
Supported Browser:
- Google Chrome
- Internet Explorer
- Firefox
- Opera
- Safari
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