Slots pattern for flexible components in Figma - Cell-by-Cell Formula Trace

Concept Flow

Component: Card
  ├─ Slot: Header
  ├─ Slot: Body
  └─ Slot: Footer

Component: Modal
  ├─ Slot: Header
  ├─ Slot: Body
  └─ Slot: Footer

This diagram shows two UI components, Card and Modal, each having three named slots: Header, Body, and Footer. The slots pattern allows placing different content into these named areas flexibly.

Formula

RenderComponent('Card', {Header: 'Title Text', Body: 'Description Text', Footer: 'Action Buttons'})

This command renders the Card component by filling its Header, Body, and Footer slots with the specified content.

Step-by-Step Trace

Step	Expression	Evaluates To	Explanation
1	Identify component type 'Card'	Card component structure with slots Header, Body, Footer	Select the Card component which has three slots.
2	Assign content to slots: Header='Title Text', Body='Description Text', Footer='Action Buttons'	Slots filled with provided content	Each slot receives the specified content.
3	Render Header slot with 'Title Text'	Header area shows 'Title Text'	Header slot displays the title text.
4	Render Body slot with 'Description Text'	Body area shows 'Description Text'	Body slot displays the description text.
5	Render Footer slot with 'Action Buttons'	Footer area shows 'Action Buttons'	Footer slot displays the action buttons.
6	Combine all slots into final Card component render	Complete Card component with Header, Body, Footer content	All slots combined to produce the final rendered component.

The final output is a Card component with its three slots filled and rendered.

Variable Tracker

Variable	Value	Description
ComponentType	Card	The UI component being rendered
Slots	{Header, Body, Footer}	Named areas inside the component
HeaderContent	Title Text	Content assigned to Header slot
BodyContent	Description Text	Content assigned to Body slot
FooterContent	Action Buttons	Content assigned to Footer slot

Key Moments

What slots does the Card component have?

What content is assigned to the Body slot in this example?

Why use the slots pattern in components?

Sheet Trace Quiz - 1 Questions

Which content is rendered in the Card component's Footer slot?

A Action Buttons

B Title Text

C Description Text

D Modal Title

Key Result

Slots pattern lets components have named areas where different content can be placed dynamically, making UI components flexible and reusable.

Transcript

We start by choosing the Card component which has three slots: Header, Body, and Footer. Then, we assign content to each slot: 'Title Text' to Header, 'Description Text' to Body, and 'Action Buttons' to Footer. Each slot is rendered with its content, and finally, all slots combine to form the complete Card component. This pattern helps build flexible UI components by allowing dynamic content placement.

Practice

1. What is the main purpose of the Slots pattern in Figma components?

easy

A. To create placeholders inside components for flexible content

B. To lock components so they cannot be edited

C. To export components as images

D. To automatically generate color palettes

Solution

1. Step 1: Understand the Slots pattern concept

   Slots act as placeholders inside components where you can insert different content later.

2. Step 2: Identify the main purpose

   This allows components to be flexible and reusable by changing only the slot content.

3. Final Answer:

   To create placeholders inside components for flexible content -> Option A

4. Quick Check:

   Slots = placeholders for flexible content [OK]

Hint: Slots hold flexible content inside components [OK]

Common Mistakes:

• Thinking slots lock components
• Confusing slots with export features
• Assuming slots generate colors automatically

2. Which of the following is the correct way to define a slot inside a Figma component?

easy

A. Group layers and rename the group to 'Slot'

B. Use the 'Export' option on a layer

C. Add a frame and mark it as a slot placeholder

D. Create a text layer with the word 'Slot'

Solution

1. Step 1: Recall how slots are defined

   Slots are defined by adding a frame or container inside a component and marking it as a slot placeholder.

2. Step 2: Evaluate the options

   Only Add a frame and mark it as a slot placeholder correctly describes adding a frame and marking it as a slot placeholder.

3. Final Answer:

   Add a frame and mark it as a slot placeholder -> Option C

4. Quick Check:

   Slot definition = frame marked as slot [OK]

Hint: Slots are frames marked as placeholders inside components [OK]

Common Mistakes:

• Confusing slots with export settings
• Thinking renaming groups creates slots
• Assuming text layers define slots

3. Given a component with a slot named IconSlot, what happens when you drag a new icon into this slot instance?

medium

A. The component breaks and shows an error

B. The original component's icon changes everywhere

C. The slot disappears and cannot be reused

D. The new icon replaces the slot content in that instance only

Solution

1. Step 1: Understand slot instance behavior

   When you drag content into a slot in an instance, it replaces the slot content only for that instance.

2. Step 2: Check effect on original component

   The original component remains unchanged; only the instance shows the new content.

3. Final Answer:

   The new icon replaces the slot content in that instance only -> Option D

4. Quick Check:

   Slot content replaced per instance [OK]

Hint: Slot content changes only in the instance, not original [OK]

Common Mistakes:

• Thinking original component changes globally
• Believing slots disappear after use
• Assuming errors occur on drag

4. You created a slot inside a component but when you drag content into it, the content does not appear. What is the most likely cause?

medium

A. The slot frame was not marked as a slot placeholder

B. The component is locked and cannot be edited

C. The dragged content is not supported by Figma

D. The component has no fill color

Solution

1. Step 1: Check slot setup

   If content does not appear when dragged, the slot frame might not be properly marked as a slot placeholder.

2. Step 2: Rule out other causes

   Locking or fill color does not prevent slot content from showing; Figma supports common content types.

3. Final Answer:

   The slot frame was not marked as a slot placeholder -> Option A

4. Quick Check:

   Unmarked slot frame blocks content [OK]

Hint: Mark frames as slots to accept content [OK]

Common Mistakes:

• Assuming locking blocks slot content
• Blaming unsupported content types
• Thinking fill color affects slots

5. You want to create a reusable button component with a slot for an icon and a slot for label text. Which approach best uses the Slots pattern to achieve this?

hard

A. Create two separate components: one for icon and one for label, then group them

B. Create a component with two frames marked as slots: one for the icon and one for the label text

C. Use a single text layer and change its content for icon and label

D. Create a component with fixed icon and label layers without slots

Solution

1. Step 1: Understand the goal

   You want a flexible button where icon and label can be changed independently.

2. Step 2: Apply Slots pattern

   Defining two frames as slots inside the button component allows replacing icon and label content separately in instances.

3. Step 3: Evaluate other options

   Grouping separate components or fixed layers does not provide the same flexibility and reusability.

4. Final Answer:

   Create a component with two frames marked as slots: one for the icon and one for the label text -> Option B

5. Quick Check:

   Multiple slots = flexible reusable component [OK]

Hint: Use multiple slot frames for flexible parts [OK]

Common Mistakes:

• Using fixed layers instead of slots
• Grouping separate components without slots
• Trying to use one text layer for icon and label