Int8Array Object

A typed array of 8-bit integer values. The contents are initialized to 0. If the requested number of bytes could not be allocated an exception is raised.

Syntax


      int8Array = new Int8Array( length );  
intArray = new Int8Array( array );  
intArray = new Int8Array( buffer, byteOffset, length);  

Parameters

int8Array
Required. The variable name to which the Int8Array object is assigned.

length
Specifies the number of elements in the array.

array
The array (or typed array) that is contained in this array.. The contents are initialized to the contents of the given array or typed array, with each element converted to the Int8 type.

buffer
The ArrayBuffer that the Int8Array represents.

byteOffset
Optional. Specifies the offset in bytes from the start of the buffer at which the Int8Array should begin.

length
The number of elements in the array.

Constants

The following table lists the constants of the Int8Arrayobject.

Constant Description
BYTES_PER_ELEMENT Constant The size in bytes of each element in the array.

Properties

The following table lists the constants of the Int8Arrayobject.

Property Description
buffer Property Read-only. Gets the ArrayBuffer that is referenced by this array.
byteLength Property Read-only. The length of this array from the start of its ArrayBuffer, in bytes, as fixed at construction time.
byteOffset Property Read-only. The offset of this array from the start of its ArrayBuffer, in bytes, as fixed at construction time.
length Property The length of the array.

Methods

The following table lists the methods of the Int8Arrayobject.

Method Description
set Method (Int8Array) Sets a value or an array of values.
subarray Method (Int8Array) Gets a new Int8Array view of the ArrayBuffer store for this array.

Example

The following example shows how to use an Int8Array object to process the binary data acquired from an XmlHttpRequest:

var req = new XMLHttpRequest();  
    req.open('GET', "http://www.example.com");  
    req.responseType = "arraybuffer";  
    req.send();  

    req.onreadystatechange = function () {  
        if (req.readyState === 4) {  
            var buffer = req.response;  
            var dataview = new DataView(buffer);  
            var ints = new Int8Array(buffer.byteLength);  
            for (var i = 0; i < ints.length; i++) {  
                ints[i] = dataview.getInt8(i);  
            }  
        alert(ints[10]);  
        }  
    }  

Requirements

Supported in the following document modes: Internet Explorer 10 standards and Internet Explorer 11 standards. Also supported in Store apps (Windows 8 and Windows Phone 8.1). See Version Information.
Not supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards.