Astro Dev Toolbar App // CHROME BUILT-IN AI

astro-dev-island-hydration-advisor

Inspect tags to eliminate eager hydration below the fold.

View on GitHub ↗ Quickstart Spec ↓

01. Architectural Specifications STATUS: PRODUCTION READY

[ 01 // CAPABILITY ]

Viewport Fold Analysis

Visually maps the initial viewport fold line and checks all island bounding coordinates.

[ 02 // CAPABILITY ]

Eager Hydration Flagging

Detects client:load on components below the fold and quantifies TBT/INP performance penalties.

[ 03 // CAPABILITY ]

Nano Strategy Advisor

Prompts Gemini Nano to formulate component-specific recommendations (client:visible, client:idle).

02. Implementation & Usage BUN / ASTRO 5+

// Installation CLI

bun add astro-dev-island-hydration-advisor
# or
pnpm add astro-dev-island-hydration-advisor

// Configuration astro.config.mjs

// astro.config.mjs
import { defineConfig } from "astro/config";
import devIslandAdvisor from "astro-dev-island-hydration-advisor";

export default defineConfig({
  integrations: [
    devIslandAdvisor({
      foldThresholdPx: 100,
      highlightEagerIslands: true
    })
  ]
});

// Chrome Built-in AI Prerequisites

1. Open chrome://flags in Google Chrome 128+
2. Set #prompt-api-for-gemini-nano to Enabled
3. Set #optimization-guide-on-device-model to Enabled ByPassPerfRequirement
4. Restart Chrome and verify model status at chrome://components