Slots class
📖 Description
The Slots class defines a collection that holds all the slots for a block. It is used in the builder part of a block implementation to denote the data slots for that block. There are four kinds of slots supported by the Slots class:
static: Static slots are fixed slots that are required for the functional operation of a block (for example, a string slot that holds the text value of a text input block);dynamic: Dynamic slots are used for dynamic elements in a block (for example, slots that are created for each checkbox of a block that supports a customizable list of checkboxes);feature: Feature slots are used for optional features of a block (for example, a slot that holds the score value of a block that supports an optional score feature);meta: Meta slots are used to store metadata (for example, the time taken to answer a block).
🗃️ Fields
🏷️ all
Retrieves all the slots that are in the collection.
Type
🏷️ count
Retrieves the number of slots in the collection.
Type
number
🏷️ firstItem
Retrieves the first slot in the collection.
Type
Slot | undefined
🏷️ lastItem
Retrieves the last slot in the collection.
Type
Slot | undefined
▶️ Methods
🔧 clean
Removes all the slots from the slots collection.
Signature
clean(kind?: "static" | "dynamic" | "feature" | "meta", ...exclude: Slot[]): void
Parameters
| Name | Type | Optional | Description |
|---|---|---|---|
kind | "static" | "dynamic" | "feature" | "meta" | Yes | Optional kind that specifies the kind of slots to remove. |
...exclude | Slot[] | Yes | Specifies the slots that you want to keep. |
🔧 delete
Deletes a slot from the slots collection.
Signature
delete<T extends Slot>(
referenceOrId: string,
kind?: "static" | "dynamic" | "feature" | "meta"
): T | undefined
Parameters
| Name | Type | Optional | Description |
|---|---|---|---|
referenceOrId | string | No | Specifies the reference or the identifier of the slot. |
kind | "static" | "dynamic" | "feature" | "meta" | Yes | Optional kind to narrow the scope of the operation. |
Return value
Returns the deleted Slot instance or undefined if the slot was not found.
🔧 deprecate
Deprecates a slot. This removes a slot from the slots collection and is used when a new version of a block needs to remove slots that were created by an earlier version of the block.
Signature
deprecate<T extends Slot>(
referenceOrId: string,
kind?: "static" | "dynamic" | "feature" | "meta"
): T | undefined
Parameters
| Name | Type | Optional | Description |
|---|---|---|---|
referenceOrId | string | No | Specifies the reference or the identifier of the slot. |
kind | "static" | "dynamic" | "feature" | "meta" | Yes | Optional kind to narrow the scope of the operation. |
Return value
Returns the deprecated Slot instance or undefined if the slot was not found.
🔧 dynamic
Creates a new dynamic slot. Dynamic slots are used for dynamic elements in a block (for example, slots that are created for each checkbox of a block that supports a customizable list of checkboxes).
Signature
dynamic<T extends Slot>(properties: ISlotProperties): T
Parameters
| Name | Type | Optional | Description |
|---|---|---|---|
properties | ISlotProperties | No | Specifies the properties for the slot. |
Return value
Returns a reference to the new Slot instance.
🔧 each
Iterates through all slots in the collection.
Signature
each(fn: (slot: Slot) => boolean | void): boolean
Parameters
| Name | Type | Optional | Description |
|---|---|---|---|
fn | (slot: Slot) => boolean | void | No | Function that is called for each slot in the collection. If you want to stop the iteration, you can return true from this function to do so. |
Return value
Returns true if the iteration was stopped (break).
🔧 feature
Creates a new feature slot. Feature slots are used for optional features of a block (for example, a slot that holds the score value of a block that supports an optional score feature).
Signature
feature<T extends Slot>(properties: ISlotProperties): T
Parameters
| Name | Type | Optional | Description |
|---|---|---|---|
properties | ISlotProperties | No | Specifies the properties for the slot. |
Return value
Returns a reference to the new Slot instance.
🔧 meta
Creates a new meta slot. Meta slots are used to store metadata (for example, the time taken to answer a block).
Signature
meta<T extends Slot>(properties: ISlotProperties): T
Parameters
| Name | Type | Optional | Description |
|---|---|---|---|
properties | ISlotProperties | No | Specifies the properties for the slot. |
Return value
Returns a reference to the new Slot instance.
🔧 reverseEach
Iterates through all slots in the collection in reverse direction (starting with the last slot).
Signature
reverseEach(fn: (slot: Slot) => boolean | void): boolean
Parameters
| Name | Type | Optional | Description |
|---|---|---|---|
fn | (slot: Slot) => boolean | void | No | Function that is called for each slot in the collection. If you want to stop the iteration, you can return true from this function to do so. |
Return value
Returns true if the iteration was stopped (break).
🔧 select
Selects a slot with the supplied reference or identifier.
Signature
select<T extends Slot>(
referenceOrId: string,
kind?: "static" | "dynamic" | "feature" | "meta"
): T | undefined
Parameters
| Name | Type | Optional | Description |
|---|---|---|---|
referenceOrId | string | No | Specifies the reference or the identifier of the slot. |
kind | "static" | "dynamic" | "feature" | "meta" | Yes | Optional kind to narrow the scope of the select operation. |
Return value
Returns the Slot instance or undefined if the slot was not found.
🔧 selectByIdentifier
Selects a slot with the supplied identifier.
Signature
selectByIdentifier<T extends Slot>(id: string): T | undefined
Parameters
| Name | Type | Optional | Description |
|---|---|---|---|
id | string | No | Specifies the reference or the identifier of the slot. |
Return value
Returns the Slot instance or undefined if the slot was not found.
🔧 sort
Sorts the slots based on the sequence number of the slots.
Signature
sort(): boolean
Return value
Returns true if the order of the slots has changed.
🔧 static
Creates a new static slot. Static slots are fixed slots that are required for the functional operation of a block (for example, a string slot that holds the text value of a text input block).
Signature
static<T extends Slot>(properties: ISlotProperties): T
Parameters
| Name | Type | Optional | Description |
|---|---|---|---|
properties | ISlotProperties | No | Specifies the properties for the slot. |
Return value
Returns a reference to the new Slot instance.
Example
import { _, tripetto, slots, NodeBlock, Slots } from "@tripetto/builder";
@tripetto({
type: "node",
identifier: "example-block",
label: "Example",
icon: "data:image/svg+xml;base64,PHN2ZyAvPg=="
})
class ExampleBlock extends NodeBlock {
@slots
onSlots(): void {
// Let's define a static slot that holds a text value
this.slots.static({
type: Slots.Text,
reference: "text-value",
label: _("Example value")
});
}
}