reshow-runtime

0.17.15 verified Sat Apr 25 auth: no javascript

Babel runtime alternative designed to replace @babel/runtime in projects using the Reshow ecosystem. Current stable version: 0.17.15. Release cadence: irregular; major breaking changes in v0.16.0 (switched to createReducer for all stores) and v0.13-beta (moved urlDispatch/UrlReturn to reshow-url). Key differentiators: lighter footprint, supports optional chaining (?.) and nullish coalescing (??), and provides helper functions for React/Redux-like patterns. Not recommended for projects outside the Reshow framework.

Common errors

error Error: Cannot find module 'reshow-runtime' ↓

cause Package not installed or not in node_modules.

fix

Run npm install reshow-runtime or yarn add reshow-runtime.

error TypeError: createReducer is not a function ↓

cause Importing createReducer incorrectly, likely as default export.

fix

Use import { createReducer } from 'reshow-runtime';

error SyntaxError: Unexpected identifier ↓

cause Using CommonJS require() in ESM-only version (v0.16.0+).

fix

Switch to import { ... } from 'reshow-runtime';

Warnings

breaking In v0.16.0, all stores must now use createReducer. Old store patterns (e.g., createStore with handlers) are removed. ↓

fix Migrate store definitions to use createReducer with handler maps.

breaking In v0.13-beta, urlDispatch and UrlReturn moved from reshow-runtime to reshow-url. ↓

fix Install reshow-url and import urlDispatch/UrlReturn from there instead.

deprecated CommonJS require() is no longer supported; package is ESM-only from v0.16.0. ↓

fix Use import syntax. If using Node.js, ensure "type": "module" or use .mjs extension.

Install

npm install reshow-runtime

yarn add reshow-runtime

pnpm add reshow-runtime

Imports

createReducer
wrong
```
const { createReducer } = require('reshow-runtime');
```
correct
```
import { createReducer } from 'reshow-runtime';
```
Package is ESM-only since v0.16.0. Use import syntax in Node.js with { "type": "module" } or bundler.
toMap
wrong
```
import toMap from 'reshow-runtime';
```
correct
```
import { toMap } from 'reshow-runtime';
```
toMap is a named export, not default. Converts all first-level immutable object keys to JS.
connect-hook
wrong
```
import connectHook from 'reshow-runtime';
```
correct
```
import { connectHook } from 'reshow-runtime';
```
connectHook is a named export for connecting React hooks to stores. Available since v0.13-beta.

Quickstart

Demonstrates use of createReducer and toMap from reshow-runtime with a simple counter reducer.

import { createReducer, toMap } from 'reshow-runtime';

const initialState = { count: 0 };
const reducer = createReducer({
  increment: (state) => ({ count: state.count + 1 }),
  decrement: (state) => ({ count: state.count - 1 }),
}, initialState);

const state = { count: 0 };
const newState = reducer(state, { type: 'increment' });
console.log(newState); // { count: 1 }

const immutableObject = { a: { b: 1 } };
const jsObject = toMap(immutableObject);
console.log(jsObject.a.b); // 1 (JS object instead of immutable Map)