Why I use rswitch instead of long switch blocks

#javascript #programming #typescript #node

Big switch statements get messy fast: lots of case, break, and repeated code.
rswitch is a small library that lets you write the same logic in a cleaner way. You match a value and get the result from an object.

Install

npm i rswitch

Basic idea

You give rswitch:

a key (the value you want to check)
a cases object (what to return for each case)
an optional options object

Simple example

import rswitch from "rswitch";

const role = "dev";

const result = rswitch(role, {
  designer: "Designer",
  "dev, web": "Freelancer", // match many keys
  "": "Unknown",            // default case
});

console.log(result); // Freelancer

✅ Tip: "" (empty string) is the default case.

Example 1: Handle status codes (clean and clear)
import rswitch from "rswitch";

function statusMessage(code) {
  return rswitch(code, {
    "200, 201, 204": "✅ Success",
    "400, 401, 403": "⛔ Client error",
    "500, 502, 503": "🔥 Server error",
    "": "🤷 Unknown status",
  });
}

console.log(statusMessage(503)); // 🔥 Server error

No break, no fall-through, easy to read.

Example 2: Run functions as actions

Actions can be values or functions.

import rswitch from "rswitch";

const command = "build";

const result = rswitch(command, {
  build: () => "Building...",
  test: () => "Testing...",
  "": () => "Use: build or test",
});

console.log(result); // Building...

Why rswitch is better than switch (for many cases)