use-mutative
v1.1.8
Published
A hook to use Mutative as a React hook to efficient update react state immutable with mutable way
Downloads
11,580
Maintainers
Readme
use-mutative
A hook to use Mutative as a React hook to efficient update react state immutable with mutable way.
use-mutative
is 2-6x faster than useState()
with spread operation, more than 10x faster than useImmer()
. Read more about the performance comparison in Mutative.
Installation
Yarn
yarn add mutative use-mutative
NPM
npm install mutative use-mutative
API
useMutative()
Provide you can create immutable state easily with mutable way.
import { useMutative } from 'use-mutative';
export function App() {
const [todos, setTodos] = useMutative([{ text: 'todo' }]);
return (
<>
<button
onClick={() => {
// set todos with draft mutable
setTodos((draft) => {
draft.push({ text: 'todo 2' });
});
}}
>
click
</button>
<button
onClick={() => {
// also can override value directly
setTodos([{ text: 'todo' }, { text: 'todo 2' }]);
}}
>
click
</button>
</>
);
}
useMutativeReducer()
Provide you can create immutable state easily with mutable way in reducer way.
For return values that do not contain any drafts, you can use
rawReturn()
to wrap this return value to improve performance. It ensure that the return value is only returned explicitly.
import { rawReturn } from 'mutative';
import { useMutativeReducer } from 'use-mutative';
const initialState = {
count: 0,
};
function reducer(
draft: Draft<typeof initialState>,
action: { type: 'reset' | 'increment' | 'decrement' }
) {
switch (action.type) {
case 'reset':
return rawReturn(initialState);
case 'increment':
return void draft.count++;
case 'decrement':
return void draft.count--;
}
}
export function App() {
const [state, dispatch] = useMutativeReducer(reducer, initialState);
return (
<div>
Count: {state.count}
<br />
<button onClick={() => dispatch({ type: 'increment' })}>Increment</button>
<button onClick={() => dispatch({ type: 'decrement' })}>Decrement</button>
<button onClick={() => dispatch({ type: 'reset' })}>Reset</button>
</div>
);
}
More detail about use-mutative
can be found in API docs
Patches
In some cases, you may want to get that patches from your update, we can pass { enablePatches: true }
options in useMutative()
or useMutativeReducer()
, that can provide you the ability to get that patches from pervious action.
const [state, updateState, patches, inversePatches] = useMutative(initState, {
enablePatches: true,
});
const [state, dispatch, patches, inversePatches] = useMutativeReducer(
reducer,
initState,
initializer,
{ enablePatches: true }
);
patches format will follow https://jsonpatch.com/, but the "path"
field be array structure.
License
use-mutative
is MIT licensed.