This is a minimalist library for decoding and encoding base64 VLQs. This repository is also a companion to this blog post, which also explains base64 VLQs.
In TypeScript:
import {base64VlqEncode, base64VlqDecode} from '@lewistg/base64-vlq-codec';
base64VlqEncode([1776, -2387, 2121809, 8, 1820, -8121988]); // 'gvDn1EilwhEQ4xDpo3vP'
base64VlqDecode('uDt7D0TkuK'); // [55, -1974, 314, 5346]$ npm install --save-dev '@lewistg/base64-vlq-codec'