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@datahandler/theme-switcher

v0.1.1

Published

7 days ago

Tiny framework-agnostic theme switcher with localStorage persistence

0High
0Medium
0Low

theme dark-mode light-mode localStorage frontend

theme-switcher

Tiny framework-agnostic theme switching + persistence.

Install

Once published:

npm install @datahandler/theme-switcher

Usage

import { createThemeSwitcher } from "@datahandler/theme-switcher";

const btn = document.getElementById("theme-btn");

const switcher = createThemeSwitcher({
  button: btn,
  storageKey: "my-app-theme",
  defaultTheme: "dark",
  datasetKey: "theme", // sets <html data-theme="...">
  stylesheetIdsByTheme: {
    light: "fp-theme-light",
    dark: "fp-theme-dark",
  },
  onThemeApplied: (theme) => {
    btn.textContent = theme === "dark" ? "Dark" : "Light";
  },
});

switcher.init();

API

createThemeSwitcher(options) returns:

init() – applies initial theme and wires the click handler
toggle() – flips dark/light
setTheme(theme) – applies a theme
getTheme() – current theme from DOM
dispose() – removes the click handler

Notes

Persistence uses localStorage by default, but failures are ignored (e.g. storage blocked).
Stylesheet toggling is optional; omit stylesheetIdsByTheme if you don’t need it.