├── src
    ├── index.css
    ├── custom hooks.js
    ├── props.js
    ├── usememo child.js
    ├── usecontextpage2.js
    ├── usecallback child.js
    ├── usecontextpage3.js
    ├── child3.js
    ├── custom hooks
    │   ├── usefunction1.js
    │   └── custom hook1.js
    ├── App.css
    ├── import custom hooks.js
    ├── usereducerfn1.js
    ├── usecontext2.js
    ├── usecontext1.js
    ├── usecontext page1.js
    ├── index.js
    ├── usememo parent.js
    ├── usecallback parent.js
    ├── usecontext3.js
    ├── reactememo parent.js
    ├── App.js
    ├── usereducer1.js
    ├── usememo
    │   └── usememo parent.js
    ├── usreducerfunc.js
    ├── react memo  child.js
    ├── machine task rating.js
    └── usereducer.js
├── public
    ├── favicon.ico
    ├── logo192.png
    ├── logo512.png
    ├── robots.txt
    ├── manifest.json
    └── index.html
├── .gitignore
├── package.json
└── README.md


/src/index.css:
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1 | 


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/public/favicon.ico:
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https://raw.githubusercontent.com/m-h-d-salih/react-hooks/HEAD/public/favicon.ico


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/public/logo192.png:
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https://raw.githubusercontent.com/m-h-d-salih/react-hooks/HEAD/public/logo192.png


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/public/logo512.png:
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https://raw.githubusercontent.com/m-h-d-salih/react-hooks/HEAD/public/logo512.png


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/public/robots.txt:
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1 | # https://www.robotstxt.org/robotstxt.html
2 | User-agent: *
3 | Disallow:
4 | 


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/src/custom hooks.js:
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1 | import { useState } from "react";
2 | 
3 | const useColor=()=>{
4 |     const [color,setColor]=useState('red');
5 |     return [color,setColor];
6 | }
7 | export default useColor;


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/src/props.js:
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 1 | const Some=(props)=>{
 2 | 
 3 |     return(
 4 |         <>
 5 |         <h1>{props.name}</h1>
 6 |         <input onChange={(e)=>console.log(e.target.value)} type='text'/>
 7 |         </>
 8 |     )
 9 | }
10 | export default Some;


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/src/usememo child.js:
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 1 | import { memo } from "react";
 2 | 
 3 | const Childmemo=()=>{
 4 |     console.log('child rendered');
 5 |     return(
 6 |         <>
 7 |        <h1>hiii</h1>
 8 |         </>
 9 |     )
10 | }
11 | export default memo(Childmemo);


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/src/usecontextpage2.js:
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 1 | import UseContextpage3 from "./usecontextpage3";
 2 | 
 3 | const UseContextpage2=()=>{
 4 |     return(
 5 |         <>
 6 |         <h1>2</h1>
 7 |         <UseContextpage3/>
 8 |         </>
 9 |     )
10 | }
11 | export  default UseContextpage2;


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/src/usecallback child.js:
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 1 | const ChilduseCallback=({handleclick})=>{
 2 |     console.log('child rendering');
 3 |     
 4 |     return(
 5 |         <div>
 6 |             
 7 |             {handleclick}
 8 |             </div>
 9 |     )
10 | }
11 | export default ChilduseCallback;


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/src/usecontextpage3.js:
--------------------------------------------------------------------------------
 1 | import { useContext } from "react"
 2 | import { Newcontext } from "./usecontext page1"
 3 | 
 4 | const UseContextpage3=()=>{
 5 |     const val=useContext(Newcontext)
 6 |     return(
 7 |         <>
 8 |         <h1>3</h1>
 9 |         <h1>{val}</h1>
10 |         </>
11 |     )
12 | }
13 | export default UseContextpage3


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/src/child3.js:
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 1 | import React from 'react'
 2 | import './App.css';
 3 | 
 4 | 
 5 | const Child3 = ({setdisplay,display,obj}) => {
 6 |   return (
 7 |     <div>
 8 |        <div className='child c' onClick={()=>setdisplay(!display)} ><h1>{display ?obj.age:obj.name}</h1></div>
 9 | 
10 |     </div>
11 |   )
12 | }
13 | 
14 | export default Child3
15 | 


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/src/custom hooks/usefunction1.js:
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 1 | import { useState } from "react"
 2 | 
 3 | const useForm=(initial)=>{
 4 |     const[value,setValue]=useState(initial);
 5 |     return [value,event=>{
 6 |         setValue({
 7 |             ...value,
 8 |             [event.target.name]:event.target.value,
 9 |     })
10 |     }]
11 | }
12 | export default useForm;


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/src/App.css:
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 1 | body{
 2 |   margin: 0;
 3 | }
 4 | .container{
 5 |   display: flex;
 6 |   justify-content: space-around;
 7 | }
 8 | .child{
 9 |   width:30%;
10 | }
11 | .a{
12 |   background-color: red;
13 |   height: 500px;
14 | }
15 | .b{
16 |   background-color:lightblue;
17 |   height: 200px;
18 | }
19 | .c{
20 |   background-color: aqua;
21 |   height: 500px;
22 |   width:auto
23 | }


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/src/import custom hooks.js:
--------------------------------------------------------------------------------
 1 | // import { useState } from "react"
 2 | import useColor from './custom hooks';
 3 | 
 4 | const Importhooks=()=>{
 5 |     const [color,setColor]=useColor('red');
 6 |     return(
 7 |         <>
 8 |         <div style={{backgroundColor:color}} onClick={()=>setColor(color=>color==='red'?'black':'red')}>hello</div>
 9 |         </>
10 |     )
11 | }
12 | export default Importhooks;


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/src/usereducerfn1.js:
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 1 | function Reducer(state,action)
 2 | {
 3 |     switch(action.type){
 4 |         case 'change-value':return {
 5 |             ...state,
 6 |             value:state.value+action.payload
 7 |         }
 8 |         case 'change-color':return{
 9 |             ...state,
10 |     color:state.payload
11 |         }
12 |         default:return;
13 |     }
14 | }
15 | export default Reducer;


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/.gitignore:
--------------------------------------------------------------------------------
 1 | # See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
 2 | 
 3 | # dependencies
 4 | /node_modules
 5 | /.pnp
 6 | .pnp.js
 7 | 
 8 | # testing
 9 | /coverage
10 | 
11 | # production
12 | /build
13 | 
14 | # misc
15 | .DS_Store
16 | .env.local
17 | .env.development.local
18 | .env.test.local
19 | .env.production.local
20 | 
21 | npm-debug.log*
22 | yarn-debug.log*
23 | yarn-error.log*
24 | 


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/src/usecontext2.js:
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 1 | import { createContext } from "react";
 2 | import Usecontext3 from "./usecontext3";
 3 | const Mycontext1=createContext();
 4 | const Usecontext2=()=>{
 5 |     return(
 6 |         <>
 7 |         <h1>context2</h1>
 8 |         <Mycontext1.Provider value='red'>
 9 |         <Usecontext3/>
10 |         </Mycontext1.Provider>
11 |         </>
12 |     )
13 | }
14 | export default Usecontext2;
15 | export{
16 |     Mycontext1
17 | }


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/src/usecontext1.js:
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 1 | import { createContext } from "react";
 2 | import Usecontext2 from "./usecontext2";
 3 | 
 4 | const Mycontext=createContext();
 5 | const Usecontext1=()=>{
 6 |     return(
 7 |         <>
 8 |         <h1>context 1</h1>
 9 |         <Mycontext.Provider value='salih'>
10 |         <Usecontext2 />
11 |         </Mycontext.Provider>
12 |         </>
13 |     );
14 | }
15 | export default Usecontext1;
16 | export{
17 |     Mycontext
18 | }


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/src/usecontext page1.js:
--------------------------------------------------------------------------------
 1 | import { createContext } from "react";
 2 | import UseContextpage2 from "./usecontextpage2"
 3 | 
 4 | const Newcontext=createContext()
 5 | const UseContextpage1=()=>{
 6 | 
 7 |     return(
 8 |         <>
 9 |         <h1>1</h1>
10 |         <Newcontext.Provider value='salih'>
11 |         <UseContextpage2/>
12 |         </Newcontext.Provider>
13 |         </>
14 |     )
15 | }
16 | export default UseContextpage1;
17 | export {
18 |     Newcontext
19 | }


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/src/custom hooks/custom hook1.js:
--------------------------------------------------------------------------------
 1 | import useForm from "./usefunction1";
 2 | 
 3 | 
 4 |  const Custom1=()=>{
 5 |     const [value,handleValue]=useForm({
 6 |         name:'',
 7 |         email:''
 8 |     });
 9 |     return(
10 |         <>
11 |         <input type='text' name='name' onChange={handleValue}/>
12 |         <input type='text' name='email' onChange={handleValue}/>
13 |         <div id='div1'>{value.name}</div>
14 |         <div id='div1'>{value.email}</div>
15 |         </>
16 |     )
17 | }
18 | export default Custom1;


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/src/index.js:
--------------------------------------------------------------------------------
 1 | import React from 'react';
 2 | import ReactDOM from 'react-dom/client';
 3 | import './index.css';
 4 | 
 5 | // import Parentmemo from './usememo parent';
 6 | import App from './App';
 7 | 
 8 | // import UseContextpage1 from './usecontext page1';
 9 | 
10 | 
11 | 
12 | 
13 | 
14 | const root = ReactDOM.createRoot(document.getElementById('root'));
15 | root.render(
16 |   <React.StrictMode>
17 |  
18 | <App/>
19 | {/* <Parentmemo/> */}
20 |    {/* <Rating/> */}
21 | 
22 |    </React.StrictMode>
23 | );
24 | 
25 | 
26 | 


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/src/usememo parent.js:
--------------------------------------------------------------------------------
 1 | import { useMemo, useState } from "react";
 2 | import Childmemo from "./usememo child";
 3 | 
 4 | 
 5 | 
 6 | const Parentmemo=()=>{
 7 |     console.log('parent rendered');
 8 |     const[state,setState]=useState(0)
 9 |     const arr=useMemo(()=>{
10 |         return [1,2,3];
11 |     },[])
12 | // const arr=[1,2,3];
13 |     return(
14 |         <>
15 |         <h1>salih</h1>
16 |         <button onClick={()=>setState(state+1)}> increment</button>
17 |         <h4>{state}</h4>
18 |         <Childmemo arr={arr}/>
19 |         </>
20 |     )
21 | }
22 | export default Parentmemo;


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/src/usecallback parent.js:
--------------------------------------------------------------------------------
 1 | import { useCallback, useState } from "react";
 2 | 
 3 | import ChilduseCallback from "./usecallback child";
 4 | 
 5 | 
 6 | const Parentusecallback=()=>{
 7 |     console.log('parent rendering');
 8 |   
 9 |     const [state,setState]=useState(0);
10 |     const handleclick=useCallback(()=>{},[])
11 |     
12 |     return(
13 |         <>
14 |         <h1>parent</h1>
15 |         <button onClick={()=>setState(prevstate=>prevstate+1)}> click me</button>{state}
16 |         <ChilduseCallback handleclick={handleclick}/>
17 |         </>
18 |     )
19 | }
20 | export default Parentusecallback;


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/public/manifest.json:
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 1 | {
 2 |   "short_name": "React App",
 3 |   "name": "Create React App Sample",
 4 |   "icons": [
 5 |     {
 6 |       "src": "favicon.ico",
 7 |       "sizes": "64x64 32x32 24x24 16x16",
 8 |       "type": "image/x-icon"
 9 |     },
10 |     {
11 |       "src": "logo192.png",
12 |       "type": "image/png",
13 |       "sizes": "192x192"
14 |     },
15 |     {
16 |       "src": "logo512.png",
17 |       "type": "image/png",
18 |       "sizes": "512x512"
19 |     }
20 |   ],
21 |   "start_url": ".",
22 |   "display": "standalone",
23 |   "theme_color": "#000000",
24 |   "background_color": "#ffffff"
25 | }
26 | 


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/src/usecontext3.js:
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 1 | import { useContext, useState } from "react";
 2 | import { Mycontext } from "./usecontext1";
 3 | import { Mycontext1 } from "./usecontext2";
 4 | 
 5 | const Usecontext3=()=>{
 6 |     const val=useContext(Mycontext);
 7 |     let val2=useContext(Mycontext1);
 8 |     const [color,setColor]=useState(val2)
 9 |     return(
10 |         <>
11 |         <h1 style={{backgroundColor:color}}>context3</h1>
12 |         <button style={{backgroundColor:color}} onClick={()=>setColor(prev=>prev==='red'?'green':'red')}>swicth theme</button>
13 |         <h2>{val}</h2>
14 |         </>
15 |     )
16 | }
17 | export default Usecontext3;


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/src/reactememo parent.js:
--------------------------------------------------------------------------------
 1 | import { useState } from "react";
 2 | import useColor from "./custom hooks";
 3 | import MemoChild from "./react memo  child";
 4 | 
 5 | const Parent=()=>{
 6 |     console.log('parent rendering');
 7 |     const [color,setColor]=useColor('red');
 8 |     const [name,setName]=useState('salih');
 9 |     return(
10 |         <>
11 |         <h1>parent</h1>
12 |         <button style={{backgroundColor:color}} onClick={()=>setColor(color=>color==='red'?'black':'red')}> click me</button>
13 |         <button onClick={()=>setName('nidha')}> click me</button>
14 |         <MemoChild name={name}/>
15 |         </>
16 |     )
17 | }
18 | export default Parent;


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/src/App.js:
--------------------------------------------------------------------------------
 1 | 
 2 | import { useState } from 'react';
 3 | import Child3 from './child3';
 4 | import Rating from './machine task rating'
 5 | import './App.css';
 6 | 
 7 | function App() {
 8 |   
 9 |   const [display,setdisplay]=useState(false)
10 |   // const name='salih';
11 |   // const age=20;
12 |   const obj={
13 |     name:'salih',
14 |     age:20
15 |   }
16 |  return(
17 |   <div className='container'>
18 |  <div className='child a' onClick={()=>setdisplay(!display)}><h1>{display ? obj.name:obj.age}</h1></div>
19 |  <div className='child b'> 2</div>
20 |  <Child3 setdisplay={setdisplay} display={display} obj={obj}/>
21 |  <Rating/>
22 |   </div>
23 |  )
24 | }
25 | 
26 | export default App;
27 | 


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/src/usereducer1.js:
--------------------------------------------------------------------------------
 1 | import { useReducer } from "react"
 2 | import Reducer from "./usereducerfn1";
 3 | 
 4 | 
 5 | const Usereducer1=()=>{
 6 |     // const[count,setCount]=useState(0);
 7 |     const[state,dispatch]=useReducer(Reducer,{color:'red',value:0});
 8 |     
 9 |     return(
10 |         <>
11 |         <button onClick={()=>dispatch({type:'change-value',payload:1})}>increment</button>
12 |         {state.value}
13 |         <button onClick={()=>dispatch({type:'change-value',payload:-1})}>Decrement</button>
14 | ``
15 |         
16 |         <button style={{background:state.color}} onClick={()=>dispatch({type:'change-color',payload:state.color==='red'?'green':'red'})}>switch</button>
17 |         </>
18 |     )
19 | }
20 | export default Usereducer1;


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/src/usememo/usememo parent.js:
--------------------------------------------------------------------------------
 1 | import { useMemo, useState } from "react"
 2 | 
 3 | const Usememoparent=()=>{
 4 |     const[count1,setCount1]=useState(0);
 5 |     const[count2,setCount2]=useState(0);
 6 |     const isEven= useMemo(()=>{
 7 |         let i=0;
 8 |         while(i<2000000000)i++;
 9 |         return count1 %2===0;
10 |     },[count1])
11 |     // const isEven=()=>{
12 |     // let i=0;
13 |     // while(i<2000000000)i++;
14 |     // return count1 %2===0;
15 |     // }
16 | 
17 |     return(
18 |         <>
19 |         <button onClick={()=>setCount1(count1+1)}>click :{count1}</button><br/>
20 |         <span>{isEven?"EVEN":'ODD'}</span><br/>
21 |         <button onClick={()=>setCount2(count2+1)}>click :{count2}</button>
22 |         </>
23 |     )
24 | }
25 | export default Usememoparent;


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/src/usreducerfunc.js:
--------------------------------------------------------------------------------
 1 | // function Reducer(state,action) {
 2 | // switch(action){
 3 | //     case 'increment':return {...state,value:state.value+1};
 4 | //     case 'decrement':return {...state,value:state.value-1};   
 5 | //     case 'red':return {...state,color:'red'};
 6 | //     case 'green':return {...state,color:'green'};
 7 | //     default:break;
 8 | // }
 9 |  
10 |     
11 | // }
12 | 
13 | function Reducer(state,action) {
14 |     switch(action.type){
15 |         case 'change-value':return {
16 |             ...state,
17 |             value:state.value+action.payload
18 |         }
19 |         case 'change-color':return {
20 |             ...state,
21 |             color:action.color
22 |         }
23 |         default:break;
24 |     }
25 |      
26 |         
27 |     }
28 | export default Reducer


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/src/react memo  child.js:
--------------------------------------------------------------------------------
 1 | // import useColor from "./custom hooks";
 2 | 
 3 | import React from "react";
 4 | 
 5 | 
 6 | 
 7 | // import axios from "axios";
 8 | const Child=({name})=>{
 9 |     console.log('child rendering');
10 |     //axios 
11 |     // const fetchData = async () => {
12 |     //     try {
13 |     //       const response = await axios.get('https://reqres.in/api/users');
14 |     //       console.log(response.data);
15 |     //     } catch (error) {
16 |     //       console.error('Error fetching data:', error);
17 |     //     }
18 |     //   };
19 |     //   fetchData(); 
20 |     // const [color,setColor]=useColor();
21 |     return(
22 |         <>
23 |         <h1>{name}</h1>
24 |         {/* <button style={{backgroundColor:color}} onClick={()=>setColor(color=>color==='red'?'black':'red')}> click me</button> */}
25 |        
26 |         </>
27 |     )
28 | }
29 | 
30 | 
31 | export default React.memo(Child)


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/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "switch-theme",
 3 |   "version": "0.1.0",
 4 |   "private": true,
 5 |   "dependencies": {
 6 |     "@testing-library/jest-dom": "^5.17.0",
 7 |     "@testing-library/react": "^13.4.0",
 8 |     "@testing-library/user-event": "^13.5.0",
 9 |     "axios": "^1.7.2",
10 |     "react": "^18.3.1",
11 |     "react-dom": "^18.3.1",
12 |     "react-scripts": "5.0.1",
13 |     "web-vitals": "^2.1.4"
14 |   },
15 |   "scripts": {
16 |     "start": "react-scripts start",
17 |     "build": "react-scripts build",
18 |     "test": "react-scripts test",
19 |     "eject": "react-scripts eject"
20 |   },
21 |   "eslintConfig": {
22 |     "extends": [
23 |       "react-app",
24 |       "react-app/jest"
25 |     ]
26 |   },
27 |   "browserslist": {
28 |     "production": [
29 |       ">0.2%",
30 |       "not dead",
31 |       "not op_mini all"
32 |     ],
33 |     "development": [
34 |       "last 1 chrome version",
35 |       "last 1 firefox version",
36 |       "last 1 safari version"
37 |     ]
38 |   }
39 | }
40 | 


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/src/machine task rating.js:
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 1 | import { useState } from "react";
 2 | 
 3 | 
 4 | 
 5 | const Rating=()=>{
 6 |    const [color1,setColor1]=useState('red');
 7 |    const [color2,setColor2]=useState('red');
 8 |    const [color3,setColor3]=useState('red');
 9 |    const [color4,setColor4]=useState('red');
10 |     
11 |  return(
12 |     <div style={{display:'flex'}}>
13 |     
14 |     <div onClick={()=>{setColor1('black');setColor2('red');setColor3('red');setColor4('red')}} style={{width:'20px',height:'20px',background:color1,marginLeft:'40px'}}></div>
15 |     <div onClick={()=>{setColor1('black');setColor2('black');setColor3('red');setColor4('red')}} style={{width:'20px',height:'20px',border:'black',background:color2,marginLeft:'40px'}}></div>
16 |     <div onClick={()=>{setColor1('black');setColor2('black');setColor3('black');setColor4('red')}} style={{width:'20px',height:'20px',border:'black',background:color3,marginLeft:'40px'}}></div>
17 |     <div onClick={()=>{setColor1('black');setColor2('black');setColor3('black');setColor4('black')}} style={{width:'20px',height:'20px',border:'black',background:color4,marginLeft:'40px'}}></div>
18 |     </div>
19 |  )
20 | 
21 | }
22 | export default Rating;


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/src/usereducer.js:
--------------------------------------------------------------------------------
 1 | 
 2 | 
 3 | import { useReducer } from "react";
 4 | import Reducer from "./usreducerfunc";
 5 | 
 6 | 
 7 | 
 8 | // function Usereducer() {
 9 | //     
10 | //     const [state,dispatch]=useReducer(Reducer,{value:0})
11 | //     return(
12 | //         <>
13 | //         <div style={{backgroundColor:state.color}}>{state.value}</div>
14 | //         <button onClick={()=>dispatch('increment')}>increment</button>
15 | //         <button onClick={()=>dispatch('decrement')}>decrement</button>
16 | //         <button onClick={()=>dispatch('red')}>red</button>
17 | //         <button onClick={()=>dispatch('green')}>green</button>
18 | 
19 | //         </>
20 | //     )
21 | // }
22 | function Usereducer() {
23 |    
24 |     const [state,dispatch]=useReducer(Reducer,{value:0})
25 |     return(
26 |         <>
27 |         <div style={{backgroundColor:state.color}}>{state.value}</div>
28 |         <button onClick={()=>{
29 |             dispatch({type:'change-value',
30 |                 payload:1
31 |             });
32 |             
33 | 
34 |             }}>increment</button>
35 |         <button onClick={()=>{
36 |             dispatch({type:'change-value',
37 |                 payload:-1
38 |             });
39 |             
40 | 
41 |             }}>decrement</button>
42 |         <button onClick={()=>{
43 |             dispatch({type:'change-color',
44 |                 color:'red'
45 |             });
46 |             
47 | 
48 |             }}>red</button>
49 |         <button onClick={()=>{
50 |             dispatch({type:'change-color',
51 |                 color:'green'
52 |             });
53 |             
54 | 
55 |             }}>green</button>
56 | 
57 |         </>
58 |     )
59 | }
60 | export default Usereducer;


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/public/index.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 |   <head>
 4 |     <meta charset="utf-8" />
 5 |     <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
 6 |     <meta name="viewport" content="width=device-width, initial-scale=1" />
 7 |     <meta name="theme-color" content="#000000" />
 8 |     <meta
 9 |       name="description"
10 |       content="Web site created using create-react-app"
11 |     />
12 |     <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
13 |     <!--
14 |       manifest.json provides metadata used when your web app is installed on a
15 |       user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
16 |     -->
17 |     <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
18 |     <!--
19 |       Notice the use of %PUBLIC_URL% in the tags above.
20 |       It will be replaced with the URL of the `public` folder during the build.
21 |       Only files inside the `public` folder can be referenced from the HTML.
22 | 
23 |       Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
24 |       work correctly both with client-side routing and a non-root public URL.
25 |       Learn how to configure a non-root public URL by running `npm run build`.
26 |     -->
27 |     <title>React App</title>
28 |   </head>
29 |   <body>
30 |     <noscript>You need to enable JavaScript to run this app.</noscript>
31 |     <div id="root"></div>
32 |     <!--
33 |       This HTML file is a template.
34 |       If you open it directly in the browser, you will see an empty page.
35 | 
36 |       You can add webfonts, meta tags, or analytics to this file.
37 |       The build step will place the bundled scripts into the <body> tag.
38 | 
39 |       To begin the development, run `npm start` or `yarn start`.
40 |       To create a production bundle, use `npm run build` or `yarn build`.
41 |     -->
42 |   </body>
43 | </html>
44 | 


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/README.md:
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 1 | # Getting Started with Create React App
 2 | 
 3 | This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
 4 | 
 5 | ## Available Scripts
 6 | 
 7 | In the project directory, you can run:
 8 | 
 9 | ### `npm start`
10 | 
11 | Runs the app in the development mode.\
12 | Open [http://localhost:3000](http://localhost:3000) to view it in your browser.
13 | 
14 | The page will reload when you make changes.\
15 | You may also see any lint errors in the console.
16 | 
17 | ### `npm test`
18 | 
19 | Launches the test runner in the interactive watch mode.\
20 | See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information.
21 | 
22 | ### `npm run build`
23 | 
24 | Builds the app for production to the `build` folder.\
25 | It correctly bundles React in production mode and optimizes the build for the best performance.
26 | 
27 | The build is minified and the filenames include the hashes.\
28 | Your app is ready to be deployed!
29 | 
30 | See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
31 | 
32 | ### `npm run eject`
33 | 
34 | **Note: this is a one-way operation. Once you `eject`, you can't go back!**
35 | 
36 | If you aren't satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project.
37 | 
38 | Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you're on your own.
39 | 
40 | You don't have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn't feel obligated to use this feature. However we understand that this tool wouldn't be useful if you couldn't customize it when you are ready for it.
41 | 
42 | ## Learn More
43 | 
44 | You can learn more in the [Create React App documentation](https://facebook.github.io/create-react-app/docs/getting-started).
45 | 
46 | To learn React, check out the [React documentation](https://reactjs.org/).
47 | 
48 | ### Code Splitting
49 | 
50 | This section has moved here: [https://facebook.github.io/create-react-app/docs/code-splitting](https://facebook.github.io/create-react-app/docs/code-splitting)
51 | 
52 | ### Analyzing the Bundle Size
53 | 
54 | This section has moved here: [https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size](https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size)
55 | 
56 | ### Making a Progressive Web App
57 | 
58 | This section has moved here: [https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app](https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app)
59 | 
60 | ### Advanced Configuration
61 | 
62 | This section has moved here: [https://facebook.github.io/create-react-app/docs/advanced-configuration](https://facebook.github.io/create-react-app/docs/advanced-configuration)
63 | 
64 | ### Deployment
65 | 
66 | This section has moved here: [https://facebook.github.io/create-react-app/docs/deployment](https://facebook.github.io/create-react-app/docs/deployment)
67 | 
68 | ### `npm run build` fails to minify
69 | 
70 | This section has moved here: [https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify](https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify)
71 | 


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