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pixel-mirror

v2.0.0

Published

Pixel Mirror helps developers achieve pixel-perfect UIs by easily overlaying design mockups.

Downloads

200

Vulnerabilities

Powered byPowered by Snyk
  • 0High
  • 0Medium
  • 0Low

Links

Git

Maintainers

p233p233

Keywords

vitedesignpixel-perfectui-overlaymockupfrontend-toolsveltedeveloper-tools

Readme

Pixel Mirror

screenshot

Overlay design mockups on web pages for pixel-perfect UI implementation. Features adjustable transparency, scaling, alignment, and grid guides.

Features

  • Mockup overlay with opacity, scale, alignment, drag positioning, and a 5-state mode system (visible / locked / dragging / solid / zoomed)
  • Grid overlay with layout columns and spacing guides
  • Desktop: keyboard shortcuts, Ctrl+Scroll opacity, click-to-zoom (2x), mouse pan
  • Mobile / Touch: double-tap solid mode, pinch-to-zoom (0.25x–4x), touch drag & pan, slide-to-adjust opacity
  • Hybrid device support: touch and keyboard/mouse inputs coexist seamlessly

Overlay Modes

The mockup overlay has 5 modes:

| Mode | Description | | ------------ | ----------------------------------------------------------------------------- | | Visible | Default. Drag, adjust opacity/scale/alignment. | | Locked | Position frozen, no interaction except unlock. | | Dragging | Active during drag, returns to visible on release. | | Solid | 100% opacity for pixel comparison. Desktop: hold Space; Mobile: double-tap. | | Zoomed | 2x zoom with mouse pan (desktop only). Click in solid mode to enter. |

Usage

Desktop

| Action | Shortcut | | ------------------------------- | --------------------------------------- | | Show / Hide mockup | Toolbar button | | Lock / Unlock position | Escape or toolbar button | | Adjust opacity | Ctrl + Scroll (click button to reset) | | Drag mockup | Mouse drag on overlay | | Nudge mockup (1px) | Arrow keys | | Nudge mockup (10px) | Shift + Arrow keys | | Enter solid mode (100% opacity) | Hold Space | | Zoom (2x) in solid mode | Click | | Pan in zoomed mode | Move mouse | | Cycle scale (1x / 0.5x) | Toolbar button |

Mobile / Touch

| Action | Gesture | | ------------------------ | ---------------------------------- | | Show / Hide mockup | Toolbar button | | Lock / Unlock position | Toolbar button | | Adjust opacity | Horizontal slide on opacity button | | Drag mockup | Touch drag on overlay | | Toggle solid mode | Double-tap anywhere | | Pinch zoom in solid mode | Two-finger pinch (0.25x–4x) | | Pan in solid mode | Single finger drag | | Cycle scale (1x / 0.5x) | Toolbar button |

Installation

npm install pixel-mirror --save-dev

Vite

// vite.config.js
import pixelMirror from "pixel-mirror/vite";

export default defineConfig({
  plugins: [pixelMirror()]
});

Astro

// astro.config.mjs
import pixelMirror from "pixel-mirror/astro";

export default defineConfig({
  integrations: [pixelMirror()]
});

Next.js

// _document.jsx <Head>
{
  process.env.NODE_ENV === "development" && (
    <Script src="https://cdn.jsdelivr.net/npm/pixel-mirror/dist/index.js" strategy="afterInteractive" />
  );
}

CDN

<script defer src="https://cdn.jsdelivr.net/npm/pixel-mirror/dist/index.js"></script>

Remove in production.

Note

This tool sets an inline position: relative style on the <html> element for overlay positioning. This may affect layouts that depend on the default static positioning of <html>.

On touch devices, browser pinch-to-zoom is temporarily disabled while the mockup overlay is visible to avoid conflicts with the tool's gesture handling. It reverts to normal when the overlay is hidden.

Credits

Icons by https://hugeicons.com