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Set of a helpful hooks, for different specific to some primitives types state changing helpers. Has two APIs:
-
First and original from v1 is based on object destructuring e.g.
const { value, toggle } = useBoolean(false)
(Docs below) -
Second API (recommended why?) is based on more idiomatic to React hooks API, e.g. like
useState
with array destructuringconst [value, actions] = useBoolean(false)
(Docs)
yarn add react-hanger
import React, { Component } from 'react';
import { useInput, useBoolean, useNumber, useArray, useOnMount, useOnUnmount } from 'react-hanger';
const App = () => {
const newTodo = useInput('');
const showCounter = useBoolean(true);
const limitedNumber = useNumber(3, { lowerLimit: 0, upperLimit: 5 });
const counter = useNumber(0);
const todos = useArray(['hi there', 'sup', 'world']);
const rotatingNumber = useNumber(0, {
lowerLimit: 0,
upperLimit: 4,
loop: true,
});
return (
<div>
<button onClick={showCounter.toggle}> toggle counter </button>
<button onClick={() => counter.increase()}> increase </button>
{showCounter.value && <span> {counter.value} </span>}
<button onClick={() => counter.decrease()}> decrease </button>
<button onClick={todos.clear}> clear todos </button>
<input type="text" value={newTodo.value} onChange={newTodo.onChange} />
</div>
);
};
import { useBoolean } from 'react-hanger' // will import all of functions
import useBoolean from 'react-hanger/useBoolean' // will import only this function
Just an alternative syntax to useState
, because it doesn't need array destructuring.
It returns an object with value
and a setValue
method.
const username = useStateful('test');
username.setValue('tom');
console.log(username.value);
const showCounter = useBoolean(true);
Methods:
toggle
setTrue
setFalse
const counter = useNumber(0);
const limitedNumber = useNumber(3, { upperLimit: 5, lowerLimit: 3 });
const rotatingNumber = useNumber(0, {
upperLimit: 5,
lowerLimit: 0,
loop: true,
});
Methods:
Both increase
and decrease
take an optional amount
argument which is 1 by default, and will override the step
property if it's used in the options.
increase(amount = 1)
decrease(amount = 1 )
Options:
lowerLimit
upperLimit
loop
-
step
- sets the increase/decrease amount of the number upfront, but it can still be overriden bynumber.increase(3)
ornumber.decrease(5)
const newTodo = useInput('');
<input value={newTodo.value} onChange={newTodo.onChange} />
<input {...newTodo.eventBind} />
<Slider {...newTodo.valueBind} />
Methods:
clear
onChange
-
eventBind
- binds thevalue
andonChange
props to an input that hase.target.value
-
valueBind
- binds thevalue
andonChange
props to an input that's using onlyvalue
inonChange
(like most external components)
Properties:
hasValue
const todos = useArray([]);
Methods:
-
push
- similar to native doesn't return length tho -
unshift
- similar to native doesn't return length tho -
pop
- similar to native doesn't return element tho -
shift
- similar to native doesn't return element tho clear
removeIndex
-
removeById
- if array consists of objects with some specificid
that you pass all of them will be removed -
modifyById
- if array consists of objects with some specificid
that you pass these elements will be modified. -
move
- moves item from position to position shifting other elements.
So if input is [1, 2, 3, 4, 5]
from | to | expected
3 | 0 | [4, 1, 2, 3, 5]
-1 | 0 | [5, 1, 2, 3, 4]
1 | -2 | [1, 3, 4, 2, 5]
-3 | -4 | [1, 3, 2, 4, 5]
const { value, set } = useMap([['key', 'value']]);
const { value: anotherValue, remove } = useMap(new Map([['key', 'value']]));
Actions:
set
delete
clear
-
initialize
- applies tuples or map instances setValue
const { state, setState, resetState } = useSetState({ loading: false });
setState({ loading: true, data: [1, 2, 3] });
resetState();
Methods:
-
setState(value)
- will merge thevalue
with the currentstate
(like this.setState works in React) -
resetState()
- will reset the currentstate
to thevalue
which you pass to theuseSetState
hook
Properties:
-
state
- the current state
Use it to get the previous value of a prop or a state value. It's from the official React Docs. It might come out of the box in the future.
const Counter = () => {
const [count, setCount] = useState(0);
const prevCount = usePrevious(count);
return (
<h1>
Now: {count}, before: {prevCount}
</h1>
);
};
- Migration to array based API is a bit more complex but recommended (especially if you're using ESLint rules for hooks). Take a look at this section in array API docs.
- All lifecycle helpers are removed. Please replace
useOnMount
,useOnUnmount
anduseLifecycleHooks
withuseEffect
. This:
useOnMount(() => console.log("I'm mounted!"));
useOnUnmount(() => console.log("I'm unmounted"));
// OR
useLifecycleHooks({
onMount: () => console.log("I'm mounted!"),
onUnmount: () => console.log("I'm unmounted!"),
});
to:
useEffect(() => {
console.log("I'm mounted!");
return () => console.log("I'm unmounted");
}, []);
-
bind
andbindToInput
are got renamed tovalueBind
andeventBind
respectively onuseInput
hook