Effector React Slots
☄️ Effector library for slots implementation in React.
What is a slot
A slot is a place in a component where you can insert any unknown component. It's a well-known abstraction used by frameworks
such as Vue.js and Svelte.
Slots aren't present in the React. With React you can achieve this goal using props or React.Context.
In large projects this is not convenient, because it generates "props hell" or smears the logic.
Using React with Effector we can achieve slot goals avoiding the problems described above.
Try it out
Usage
Step 1
npm install effector-react-slots
or
yarn add effector-react-slots
Step 2
Define constant with slots name and call createSlotFactory
.
import { createSlotFactory } from 'effector-react-slots';
export const SLOTS = {
FOO: 'foo',
} as const;
export const { api, createSlot } = createSlotFactory(SLOTS);
Step 3
Create Slot component.
import { createSlot, SLOTS } from './slots';
export const { Slot: FooSlot } = createSlot(SLOTS.FOO);
Step 4
Insert Slot component to your UI.
import React from 'react';
import { FooSlot } from './fooSlot';
export const ComponentWithSlot = () => (
<>
<h1>Hello, Slots!</h1>
<FooSlot />
</>
);
Step 5
Render something inside slot. For example, based on data from feature toggle of your app.
import { split } from 'effector';
import { $featureToggle } from './featureToggle';
import { api, SLOTS } from './slots';
const MyAwesomeFeature = () => <p>Look at my horse</p>;
const VeryAwesomeFeature = () => <p>My horse is amaizing</p>;
split({
source: $featureToggle,
match: {
awesome: (data) => data === 'awesome',
veryAwesome: (data) => data === 'veryAwesome',
},
cases: {
awesome: api.set.prepend(() => ({ id: SLOTS.FOO, component: MyAwesomeFeature })),
veryAwesome: api.set.prepend(() => ({ id: SLOTS.FOO, component: VeryAwesomeFeature })),
__: api.remove.prepend(() => ({ id: SLOTS.FOO })),
},
});
Try it out
API
createSlotFactory
Function that returns a function for creating slots and an API for manipulating them.
const SLOTS = {
FOO: 'foo'
};
const { createSlot, api } = createSlotFactory(SLOTS);
createSlot
Function, takes the slot id. Returns Slot component.
const { Slot } = createSlot('foo');
api.set
Method for rendering component in a slot. Takes slot id and component.
api.set({ id: 'foo', component: Foo });
api.remove
Method to stop rendering component in a slot. Takes slot id.
api.remove({ id: 'foo' });
api.hide
Allows to hide the slot data. Like api.remove
, without deleting the slot data. Takes slot id.
api.hide({ id: 'foo' });
api.show
Allows to show a hidden slot data. Takes slot id.
api.show({ id: 'foo' });
api.attachLogger
Since v2.2.0
Allows to log actions that take place with slots.
api.attachLogger();
slotApi.attachLogger({
fn: ({ meta: { slotId } }) => console.info(slotId),
});
slotApi.attachLogger({
watchList: [SLOTS.FOO, SLOTS.BAR],
});
slotApi.attachLogger({
watchList: [SLOTS.FOO, SLOTS.BAR],
fn: ({ meta: { slotId } }) => console.info(slotId),
});
Arguments
fn
Optional. Function which could be used for logging.
Accepts object:
{
meta: {
action: 'set' | 'remove' | 'hide' | 'show',
slotId: SlotId,
slotName: string;
};
message: string;
}
watchList
type: SlotId[]
Optional. Allows to specify which slots should be logged.
slotApi.attachLogger({
watchList: [SLOTS.FOO, SLOTS.BAR],
});
Advanced
Fallback content
Since v2.1.0
Slot can contain fallback content that is rendered if no component are passed.
import { render } from 'render';
import { createSlotFactory } from 'effector-react-slots';
const SLOTS = {
FOO: 'foo',
} as const;
const { api, createSlot } = createSlotFactory(SLOTS);
const { Slot: FooSlot } = createSlot(SLOTS.FOO);
const MyAwesomeFeature = () => <p>Look at my horse</p>;
const ComponentWithSlot = () => <FooSlot>Fallback text</FooSlot>;
render(ComponentWithSlot);
api.set({ id: SLOTS.FOO, component: MyAwesomeFeature });
render(ComponentWithSlot);
api.remove({ id: SLOTS.FOO });
render(ComponentWithSlot);
TypeScript guide
createSlot
Props of component passed to slot can be defined as generic.
createSlot<{ readonly count: number }>(string);
Useful links