usage

Examples

raw javascript

const raw = "  Score: 85%  ";
const score = Math.round(parseInt(raw.replace('Score: ', '').replace('%', ''), 10) * 1.1);

river way

const score = s("  Score: 85%  ")
  .replace('Score: ', '')
  .replace('%', '')
  .toNumber()
  .multiply(1.1)
  .round()
  .value();

development

Running tests

need node version 25 to work properly the glob

npm run test

manually run

  npx tsx --test src/**/*.test.ts

running demo

npx tsx demo.ts

overview

/src
  /logic
    string-logic.ts   <-- All string methods (toPascal, shout, etc.)
    number-logic.ts   <-- new math methods (add, multiply, round)
  /types
    types.ts    <-- TypeScript interfaces for String and Number flows
  core.ts             <-- The "River" Proxy factory
  index.ts            <-- Entry point (export s)