JavaScript: reading 3 bytes Buffer as an integer

I'm using this, if someone knows something wrong with it, please advise;

const integer = parseInt(buffer.toString("hex"), 16)

If you are using node.js v0.12+ or io.js, there is buffer.readUIntBE() which allows a variable number of bytes:

var decimal = buffer.readUIntBE(0, 3);

(Note that it's readUIntBE for Big Endian and readUIntLE for Little Endian).

Otherwise if you're on an older version of node, you will have to do it manually (check bounds first of course):

var decimal = (buffer[0] << 16) + (buffer[1] << 8) + buffer[2];

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