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Set of a helpful hooks, for different specific to some primitives types state changing helpers.
Thanks goes to these wonderful people (emoji key):
 Andrey Los 🤔 🚇 |
 Praneet Rohida 🚇 |
This project follows the all-contributors specification. Contributions of any kind welcome!
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
useStatewith array destructuringconst [value, actions] = useBoolean(false)(Docs)
yarn add react-hangerimport 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:
togglesetTruesetFalse
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:
lowerLimitupperLimitloopstep- 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:
clearonChangeeventBind- binds thevalueandonChangeprops to an input that hase.target.valuevalueBind- binds thevalueandonChangeprops to an input that's using onlyvalueinonChange(like most external components)
Properties:
hasValue
const todos = useArray([]);Methods:
push- similar to native doesn't return length thounshift- similar to native doesn't return length thopop- similar to native doesn't return element thoshift- similar to native doesn't return element thoclearremoveIndexremoveById- if array consists of objects with some specificidthat you pass all of them will be removedmodifyById- if array consists of objects with some specificidthat 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:
setdeleteclearinitialize- applies tuples or map instancessetValue
const set = useSet(new Set<number>([1, 2]));const { state, setState, resetState } = useSetState({ loading: false });
setState({ loading: true, data: [1, 2, 3] });
resetState();Methods:
setState(value)- will merge thevaluewith the currentstate(like this.setState works in React)resetState()- will reset the currentstateto thevaluewhich you pass to theuseSetStatehook
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>
);
};const isPageLoaded = usePageLoad();const { ready, error } = useScript({
src: 'https://example.com/script.js',
startLoading: true,
delay: 100,
onReady: () => {
console.log('Ready');
},
onError: (error) => {
console.log('Error loading script ', error);
},
});const isDocumentReady = useDocumentReady();useGoogleAnalytics({
id: googleAnalyticsId,
startLoading: true,
delay: 500,
});const { width, height } = useWindowSize();const done = useDelay(1000);const tokenValue = usePersist('auth-token', 'value');useToggleBodyClass(true, 'dark-mode');useOnClick((event) => {
console.log('Click event fired: ', event);
});// Pass ref to the element
const containerRef = useOnClickOutside(() => {
console.log('Clicked outside container');
});// pass ref to the element
// call focusElement to focus the element
const [elementRef, focusElement] = useFocus();const { imageVisible, bindToImage } = useImage(src, onLoad, onError);- 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,useOnUnmountanduseLifecycleHookswithuseEffect. 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");
}, []);bindandbindToInputare got renamed tovalueBindandeventBindrespectively onuseInputhook