tigt / nanoprint

Creates the tiniest cachebusting static asset hashes you ever did see.

Nanoprint

Nanoprint accepts some data and creates a short string, for file fingerprinting.

Specifically, 7 characters of URL-safe Base64, which is 42 bits of entropy — combined with the filename, you should “never” have collisions.

Method	Fingerprint
Full hex string	908e25f4bf641868d8683022a5b62f54
rev-hash	bb9d8fe615
Nanoprint	Q4-jgzM

Is this a huge performance improvement? No, but it’s shorter and compresses slightly better for some reason.

Usage

You can pass nanoprint a string or a Buffer.

var nanoprint = require('nanoprint');
nanoprint('html{display:none/* The fastest render is no render */}');
// → "fQT8IeT"

var fs = require('fs');
var pngFile = fs.readFileSync('path/to/some.png');
nanoprint(pngFile);
// → something like "ZW5kZXI"

You can also specify a hashing algorithm like this: nanoprint(data, 'sha256'). (Why? Better gzipping with Subresource Integrity, I guess. I’m not your dad.)