gragland

import { useState, useMemo } from 'react';

// Usage
function App() {
  // State for our counter
  const [count, setCount] = useState(0);
  // State to keep track of current word in array we want to show
  const [wordIndex, setWordIndex] = useState(0);

  // Words we can flip through and view letter count

gragland

import { useState, useEffect } from 'react';

// Usage
function App() {
  // Call our hook for each key that we'd like to monitor
  const happyPress = useKeyPress('h');
  const sadPress = useKeyPress('s');
  const robotPress = useKeyPress('r');
  const foxPress = useKeyPress('f');

gragland

import { useState, useEffect } from 'react';

// Usage
function App() {
  const status = useScript(
    'https://pm28k14qlj.codesandbox.io/test-external-script.js'
  );

  return (
    <div>

gragland

import { useReducer, useCallback } from 'react';

// Usage
function App() {
  const { state, set, undo, redo, clear, canUndo, canRedo } = useHistory({});

  return (
    <div className="container">
      <div className="controls">
        <div className="title">👩‍🎨 Click squares to draw</div>

gragland

import { useState, useRef } from 'react';
import { useSpring, animated } from 'react-spring';

// Displays a row of cards
// Usage of hook is within <Card> component below
function App() {
  return (
    <div className="container">
      <div className="row">
        {cards.map((card, i) => (

gragland

import { useLayoutEffect } from 'react';
import './styles.scss'; // -> https://codesandbox.io/s/15mko9187

// Usage
const theme = {
  'button-padding': '16px',
  'button-font-size': '14px',
  'button-border-radius': '4px',
  'button-border': 'none',
  'button-color': '#FFF',

gragland

import { useState, useLayoutEffect } from 'react';

// Usage
function App(){
  // State for our modal
  const [modalOpen, setModalOpen] = useState(false);
  
  return (
    <div>
      <button onClick={() => setModalOpen(true)}>Show Modal</button>

gragland

import { useState, useEffect } from 'react';

function App() {
  const columnCount = useMedia(
    // Media queries
    ['(min-width: 1500px)', '(min-width: 1000px)', '(min-width: 600px)'],
    // Column counts (relates to above media queries by array index)
    [5, 4, 3],
    // Default column count
    2

gragland

// Usage
function App() {
  const [darkMode, setDarkMode] = useDarkMode();

  return (
    <div>
      <div className="navbar">
        <Toggle darkMode={darkMode} setDarkMode={setDarkMode} />
      </div>
      <Content />

gragland

import { useState, useEffect, useRef } from 'react';

// Let's pretend this <Counter> component is expensive to re-render so ...
// ... we wrap with React.memo, but we're still seeing performance issues :/
// So we add useWhyDidYouUpdate and check our console to see what's going on.
const Counter = React.memo(props => {
  useWhyDidYouUpdate('Counter', props);
  return <div style={props.style}>{props.count}</div>;
});