Core ModulesLesson 29Free preview

Buffer Module

This lesson is part of Node.js · All levels

Summary

Buffer is a class for representing raw binary data in memory, such as the contents of an image file or network packet. JavaScript doesn't have a built-in binary type, so Buffer is the bridge. Buffers are fixed sized and can be converted to a string or array of bytes.

Key points

Buffer represents binary data of fixed size in memory
Buffer.from to make from string/array, Buffer.alloc to empty buffer
General encoding: utf8, base64, hex
Buffer length is calculated in bytes

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