State & Conditional Attributes

State attributes enable conditional logic and visibility control without JavaScript.

Core Principles

Declarative Conditions: Express logic directly in HTML
CSS-Based Performance: Uses classes for visibility, not DOM manipulation
Real-Time Evaluation: Conditions re-evaluate on every state change
Layout Stability: No content shifting or reflow

Conditional Display

data-next-show

Show elements when conditions are true.

<!-- Simple boolean conditions -->
<div data-next-show="cart.hasItems">
  Cart has items
</div>

<div data-next-show="cart.isEmpty">
  Cart is empty
</div>

<!-- Comparison operators -->
<div data-next-show="cart.total > 100">
  Free shipping unlocked!
</div>

<div data-next-show="cart.totalQuantity >= 3">
  Bulk discount applied
</div>

<!-- Complex expressions -->
<div data-next-show="cart.total > 50 && cart.totalQuantity < 10">
  Eligible for express checkout
</div>

<!-- Function calls -->
<div data-next-show="cart.hasItem(123)">
  Premium package selected
</div>

data-next-hide

Hide elements when conditions are true (inverse of show).

<!-- Hide when cart is empty -->
<button data-next-hide="cart.isEmpty">
  Proceed to Checkout
</button>

<!-- Hide when item in cart -->
<button data-next-hide="cart.hasItem(123)">
  Add Premium Package
</button>

<!-- Hide below threshold -->
<div data-next-hide="cart.total < 25">
  Checkout available
</div>

Profile Conditionals

Show/hide content based on active customer profiles.

data-next-show-if-profile

<!-- Show for specific profile -->
<div data-next-show-if-profile="premium">
  Premium member exclusive pricing
</div>

<!-- Show for multiple profiles -->
<div data-next-show-if-profile="vip,premium,gold">
  Member benefits apply
</div>

<!-- A/B testing -->
<div data-next-show-if-profile="control">
  Standard pricing: $99
</div>

<div data-next-show-if-profile="test">
  Special offer: $89
</div>

data-next-hide-if-profile

<!-- Hide from specific profiles -->
<div data-next-hide-if-profile="premium">
  Upgrade to premium for better prices
</div>

<!-- Hide upgrade prompts from members -->
<div data-next-hide-if-profile="vip,premium">
  <button>Become a Member</button>
</div>

State Classes

The SDK automatically applies CSS classes based on element state.

Cart State Classes

Class	Applied When	Used On
`.next-in-cart`	Item is in cart	Action buttons
`.next-cart-empty`	Cart has no items	Body element
`.next-cart-has-items`	Cart has items	Body element

/* Style based on cart state */
.next-in-cart {
  background: green;
  color: white;
}

.next-cart-empty .checkout-button {
  opacity: 0.5;
  pointer-events: none;
}

Action State Classes

Class	Applied When	Used On
`.next-loading`	Action in progress	Action elements
`.next-disabled`	Element disabled	Interactive elements
`.next-active`	Element is active	Toggle elements

/* Loading state */
.next-loading {
  opacity: 0.6;
  cursor: wait;
}

/* Disabled state */
.next-disabled {
  opacity: 0.4;
  pointer-events: none;
}

Selection State Classes

Class	Applied When	Used On
`.next-selected`	Option selected	Selector options
`.next-selector-active`	Has active selection	Selector container

/* Selected option */
.next-selected {
  border: 2px solid blue;
  background: #f0f8ff;
}

/* Active selector */
.next-selector-active .default-message {
  display: none;
}

Profile State Classes

Class	Applied When	Used On
`.next-profile-[id]`	Profile is active	Body element
`.next-profile-active`	Any profile active	Profile elements

/* Profile-specific styles */
.next-profile-premium .price {
  color: gold;
}

.next-profile-test .cta-button {
  background: orange;
}

Conditional Logic Syntax

Supported Operators

Operator	Description	Example
`===`	Strict equality	`cart.total === 100`
`!==`	Not equal	`profile.active !== 'premium'`
`>`	Greater than	`cart.totalQuantity > 5`
`<`	Less than	`cart.total < 50`
`>=`	Greater or equal	`cart.items.length >= 3`
`<=`	Less or equal	`cart.discount <= 10`
`&&`	Logical AND	`cart.hasItems && cart.total > 100`
`		`
`!`	Logical NOT	`!cart.hasItem(123)`

Compound Conditionals

Combine multiple conditions using logical operators for powerful conditional logic.

OR Operator (`||`)

Show elements when ANY condition is true:

<!-- Show if cart has either package -->
<div data-next-show="cart.hasItem(15) || cart.hasItem(3)">
  You have selected an eligible package!
</div>

<!-- Multiple OR conditions -->
<div data-next-show="cart.hasItem(10) || cart.hasItem(15) || cart.hasItem(20)">
  Premium package detected
</div>

<!-- Combine with comparisons -->
<div data-next-show="cart.total > 100 || cart.totalQuantity > 5">
  Eligible for bulk discount
</div>

AND Operator (`&&`)

Show elements when ALL conditions are true:

<!-- Both conditions must be met -->
<div data-next-show="cart.hasItem(15) && cart.total > 50">
  Premium package with minimum order met
</div>

<!-- Multiple AND conditions -->
<div data-next-show="cart.hasItems && cart.totalQuantity > 2 && cart.total > 30">
  Bulk order discount applied
</div>

NOT Operator (`!`)

Negate conditions:

<!-- Show when item is NOT in cart -->
<div data-next-show="!cart.hasItem(6)">
  <button data-next-action="add-to-cart" data-next-package-id="6">
    Add Extended Warranty
  </button>
</div>

<!-- Combine with other operators -->
<div data-next-show="cart.hasItems && !cart.hasItem(123)">
  Complete your order with our premium package
</div>

Parentheses for Grouping

Control operator precedence with parentheses:

<!-- OR conditions grouped with AND -->
<div data-next-show="(cart.hasItem(15) || cart.hasItem(3)) && cart.total > 50">
  Special offer unlocked!
</div>

<!-- Complex eligibility check -->
<div data-next-show="cart.hasItem(15) && (cart.total > 100 || cart.totalQuantity > 3)">
  VIP checkout available
</div>

<!-- Multiple grouped conditions -->
<div data-next-show="(cart.hasItem(2) || cart.hasItem(3) || cart.hasItem(4)) && !cart.hasItem(6)">
  Protect your purchase with extended warranty
</div>

Real-World Examples

Conditional Upsells

<!-- Show warranty upsell if main product in cart but warranty is not -->
<div data-next-show="(cart.hasItem(2) || cart.hasItem(3) || cart.hasItem(4) || cart.hasItem(5)) && !cart.hasItem(6)">
  <div class="upsell-card">
    <h3>Protect Your Purchase</h3>
    <p>Add 3-year extended warranty for peace of mind</p>
    <button data-next-action="add-to-cart" data-next-package-id="6">
      Add Warranty - $29.99
    </button>
  </div>
</div>

Smart Cross-Sells

<!-- Show accessory bundle if user has product A or B, but not the accessory -->
<div data-next-show="(cart.hasItem(100) || cart.hasItem(101)) && !cart.hasItem(200)">
  Complete your setup with our accessory bundle!
</div>

Eligibility Gates

<!-- Show express checkout only for qualified orders -->
<div data-next-show="cart.total > 25 && cart.total < 500 && cart.hasItems">
  <button data-next-action="express-checkout">
    Express Checkout Available
  </button>
</div>

Available Properties

Cart Properties

<!-- Boolean properties -->
<div data-next-show="cart.isEmpty">...</div>
<div data-next-show="cart.hasItems">...</div>
<div data-next-show="cart.hasDiscount">...</div>
<div data-next-show="cart.hasShipping">...</div>

<!-- Numeric properties -->
<div data-next-show="cart.total > 0">...</div>
<div data-next-show="cart.subtotal > 0">...</div>
<div data-next-show="cart.totalQuantity > 0">...</div>
<div data-next-show="cart.itemCount > 0">...</div>
<div data-next-show="cart.discount > 0">...</div>
<div data-next-show="cart.shipping > 0">...</div>

<!-- Functions -->
<div data-next-show="cart.hasItem(123)">...</div>
<div data-next-show="cart.hasPackage(123)">...</div>

Package Properties

<!-- Check package properties -->
<div data-next-show="package.123.inStock">...</div>
<div data-next-show="package.123.hasDiscount">...</div>
<div data-next-show="package.123.quantity > 0">...</div>
<div data-next-show="package.123.price < 100">...</div>

Order Properties

<!-- Order state checks -->
<div data-next-show="order.exists">...</div>
<div data-next-show="order.completed">...</div>
<div data-next-show="order.total > 0">...</div>
<div data-next-show="order.hasUpsells">...</div>

Profile Properties

<!-- Profile checks -->
<div data-next-show="profile.active === 'premium'">...</div>
<div data-next-show="profile.is('vip')">...</div>
<div data-next-show="profile.exists">...</div>

Common Patterns

Progressive Checkout Button

<!-- Disabled until minimum met -->
<button 
  data-next-action="checkout"
  data-next-show="cart.total >= 25"
  disabled>
  Checkout (Minimum $25)
</button>

<!-- Alternative message -->
<div data-next-show="cart.total < 25">
  Add $<span data-next-display="25 - cart.total">0</span> more to checkout
</div>

Tiered Messaging

<!-- Different messages based on cart value -->
<div data-next-show="cart.total === 0">
  Your cart is empty
</div>

<div data-next-show="cart.total > 0 && cart.total < 50">
  Add $<span data-next-display="50 - cart.total">0</span> for free shipping
</div>

<div data-next-show="cart.total >= 50 && cart.total < 100">
  Free shipping unlocked! Add $<span data-next-display="100 - cart.total">0</span> for a gift
</div>

<div data-next-show="cart.total >= 100">
  Free shipping + gift included!
</div>

Smart Product Recommendations

<!-- Show complementary products based on cart -->
<div data-next-show="cart.hasItem(123) && !cart.hasItem(456)">
  <h3>Complete your set</h3>
  <button data-next-action="add-to-cart" data-next-package-id="456">
    Add matching accessory
  </button>
</div>

<!-- Show upgrade option -->
<div data-next-show="cart.hasItem(123) && !cart.hasItem(789)">
  <button data-next-action="swap" 
          data-next-package-id="789"
          data-next-remove-package-id="123">
    Upgrade to Premium
  </button>
</div>

Quantity-Based Offers

<!-- Bulk discount tiers -->
<div data-next-show="cart.totalQuantity >= 3 && cart.totalQuantity < 5">
  10% bulk discount applied
</div>

<div data-next-show="cart.totalQuantity >= 5 && cart.totalQuantity < 10">
  15% bulk discount applied
</div>

<div data-next-show="cart.totalQuantity >= 10">
  20% bulk discount applied - Maximum savings!
</div>

Performance Considerations

Efficient Conditions

✅ Use simple conditions when possible

<div data-next-show="cart.hasItems">

✅ Combine related conditions

<div data-next-show="cart.total > 50 && cart.totalQuantity > 2">

✅ Use built-in properties

<div data-next-show="cart.isEmpty">

Avoid Complex Nesting

❌ Don't nest conditions unnecessarily

<!-- Inefficient -->
<div data-next-show="cart.hasItems">
  <div data-next-show="cart.total > 0">
    <div data-next-show="cart.totalQuantity > 0">

✅ Combine into single condition

<!-- Efficient -->
<div data-next-show="cart.hasItems && cart.total > 0">

Debugging State

With ?debugger=true, the SDK shows:

Current evaluated values
Condition results
Applied state classes
Re-evaluation frequency

<!-- Debug mode shows evaluation -->
<div data-next-show="cart.total > 100"
     data-debug-condition="cart.total > 100"
     data-debug-result="false"
     data-debug-values="cart.total=75">
  Free shipping
</div>

Edge Cases

Null Safety

The SDK safely handles null/undefined values:

<!-- Safe even if package doesn't exist -->
<div data-next-show="package.999.price > 0">
  <!-- Won't show or cause errors -->
</div>

Race Conditions

Conditions are evaluated after data loads:

<!-- Won't flicker during load -->
<div data-next-show="campaign.isLoaded && cart.total > 0">
  Ready to checkout
</div>

Dynamic Updates

Conditions re-evaluate when data changes:

// Changing cart will update all conditions
await next.addItem({ packageId: 123 });
// All data-next-show/hide automatically update

Cart Summary Checkout - Full cart and item attributes reference with checkout example
Display Attributes - Showing dynamic data
Action Attributes - Interactive elements
CSS Classes - Styling state classes
Events - Responding to state changes

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