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* feat(hook): Enter useMutableState * feat(hook): adds useMutableState tests
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,35 @@ | ||
| # useMutableState | ||
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| This hook provides mutable states that trigger the component to re-render. It offers similar functionality to Svelte's reactivity, enabling | ||
| developers to write more efficient and concise code. | ||
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| ### Why? 💡 | ||
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| - Improves code streamlining by providing a reactive state that can be used to trigger a rerender | ||
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| ### Basic Usage: | ||
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| ```jsx harmony | ||
| import { Typography, Space, Button, Tag } from 'antd'; | ||
| import useMutableState from 'beautiful-react-hooks/useMutableState'; | ||
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| const TestComponent = () => { | ||
| const counter = useMutableState({ value: 0 }); | ||
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| return ( | ||
| <DisplayDemo title="useMutableState"> | ||
| <Typography.Paragraph> | ||
| Counter: <Tag color="green">{counter.value}</Tag> | ||
| </Typography.Paragraph> | ||
| <Space> | ||
| <Button type="primary" onClick={() => counter.value += 1}>increase</Button> | ||
| <Button type="primary" onClick={() => counter.value -= 1}>decrease</Button> | ||
| </Space> | ||
| </DisplayDemo> | ||
| ); | ||
| }; | ||
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| <TestComponent /> | ||
| ``` | ||
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| <!-- Types --> |
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@@ -335,4 +335,4 @@ | |
| "require": "./useAudio.js" | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
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| import { useMemo, useState } from 'react' | ||
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| /** | ||
| * Returns a reactive value that can be used as a state. | ||
| */ | ||
| const useMutableState = <TValue, TProxied extends Record<string | symbol, TValue>>(initialState: TProxied) => { | ||
| if (typeof initialState !== 'object' || initialState === null) throw new Error('The initial state must be an object') | ||
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| const [, setState] = useState(0) | ||
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| return useMemo<TProxied>(() => new Proxy(initialState, { | ||
| set: (target, prop: keyof TProxied, value: TProxied[keyof TProxied]) => { | ||
| if (target && target[prop] !== value) { | ||
| target[prop] = value | ||
| setState((state) => (state + 1)) | ||
| } | ||
| return true | ||
| } | ||
| }), []) | ||
| } | ||
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| export default useMutableState |
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| import React, { useEffect } from 'react' | ||
| import { render } from '@testing-library/react' | ||
| import { cleanup, renderHook } from '@testing-library/react-hooks' | ||
| import useMutableState from '../dist/useMutableState' | ||
| import assertHook from './utils/assertHook' | ||
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| describe('useMutableState', () => { | ||
| beforeEach(cleanup) | ||
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| assertHook(useMutableState) | ||
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| it('should return an object', () => { | ||
| const { result } = renderHook(() => useMutableState({ value: 0 })) | ||
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| expect(result.current).to.be.an('object').that.has.property('value') | ||
| }) | ||
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| it('should re-render when the value changes', () => { | ||
| const spy = sinon.spy() | ||
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| const TestComponent = () => { | ||
| const state = useMutableState({ value: 0 }) | ||
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| spy() | ||
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| useEffect(() => { | ||
| state.value = 1 | ||
| }, []) | ||
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| return <div>val: {state.value}</div> | ||
| } | ||
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| render(<TestComponent />) | ||
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| expect(spy.callCount).to.equal(2) | ||
| }) | ||
| }) |