🌐 API + Computed Fields

Fetch tax rate from API, then auto-calculate with computed fields

💡 Enter a ZIP code and click 'Look Up Tax Rate' (or press Enter). Watch the tax rate come from the API, then see computed fields auto-calculate!

📍 Step 1: Location (API Call)

Type 5 digits and press Enter or click away

📍 ,

Tax Rate: 0% (from API)

🛒 Step 2: Order (User Input)

🧮 Step 3: Auto-Calculated (Computed Fields)

These values update automatically using the API tax rate:

Subtotal (price × quantity)

$100

Tax (subtotal × API rate)

$0

Total

$0

📐 The Flow

1️⃣ User enters ZIP → Lifecycle hook triggers

2️⃣ API called → Returns tax rate + location

3️⃣ Data stored in context.location.taxRate

4️⃣ Computed fields detect dependency change

5️⃣ Tax & Total recalculate automatically!