ESM DataView getVarint

This JavaScript library extends the DataView prototype to add a getVarint method.

The library is developed with Protobuf and SQLite varints in mind, but varints are used in other applications as well, like Bitcoin, Minecraft and many others.

• Protobuf varint
• SQLite varint

Installation

script tag

<script src="https://tomashubelbauer.github.io/esm-dataview-getvarint/index.js"></script>

From this point on, any DataView will have a getVarint method.

ES Modules (browser and Node)

Use --experimental-network-imports with Node for HTTP(S) ESM URL support:

https://nodejs.org/api/esm.html#https-and-http-imports

import 'https://tomashubelbauer.github.io/esm-dataview-getvarint/index.js';

// From this point on, any `DataView` will have a `getVarint` method.

Usage & API

/** @type {DataView} */
const dataView = …;

/** @typedef {{ value: number; byteLength: number; }} Varint */

// Get a varint at the beginning of the data view
/** @type {Varint} */
const varint = dataView.getVarint();

// Get a varint at a given byte offset in the data view
/** @type {Varint} */
const varint = dataView.getVarint(1);