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Node.js Buffer.alloc() Method

❮ Buffer Module


Create a 15 bytes buffer object:

var buf = Buffer.alloc(15);
Run example »

Definition and Usage

The Buffer.alloc() method creates a new buffer object of the specified size.


 Buffer.alloc(size, fill, encoding);

Parameter Values

Parameter Description
size Required. Specifies the size of the buffer
fill Optional. Specifies a value to fill the buffer with if specified, otherwise the buffer is filled with 0 (zero-filled)
encoding Optional. If the buffer values are strings, this parameter specifies the encoding, default encoding is utf8. Supported values are:

Technical Details

Return Value: None
Node.js Version: 5.10.0

More Examples


Using the fill parameter:

var buf = Buffer.alloc(15, 'a');
Run example »

❮ Buffer Module