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Tool Calling: Smart Home
Tools CallingReal function calling: tell the model what you want and watch it invoke JavaScript tools that drive a live dashboard.
Why On-Device?
The agentic loop — reason, call a function, read the result, respond — runs entirely on-device. Your smart-home state and commands never leave the browser.
Interactive Demo
Prompt API (tool use): Loading...
20°C
Thermostat
Silence
Speakers
Assistant
Give the house an instruction — the model chooses which tools to call.
Tool Calls
0 total
Every function the model invokes appears here with its arguments and result.
Implementation Code
demo.js
Keep exploring
56 demos, all running on-device.
Structured JSON Output
Force the model to output a strictly formatted JSON object.
Prompt API
Extract Entities (NER)
Extract people, locations, and organizations into JSON.
Prompt API
Speak to Fill
Say "table for four next Friday at seven, outside" and watch the booking form fill itself — speech in, structured data out.
Web Speech Prompt API