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W14/W14D3/react-calculator-solution/package-lock.json
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| { | ||
| "name": "calculator", | ||
| "version": "0.1.0", | ||
| "private": true, | ||
| "dependencies": { | ||
| "@testing-library/jest-dom": "^4.2.4", | ||
| "@testing-library/react": "^9.5.0", | ||
| "@testing-library/user-event": "^7.2.1", | ||
| "react": "^16.13.1", | ||
| "react-dom": "^16.13.1", | ||
| "react-scripts": "3.4.1" | ||
| }, | ||
| "scripts": { | ||
| "start": "react-scripts start", | ||
| "build": "react-scripts build", | ||
| "test": "react-scripts test", | ||
| "eject": "react-scripts eject" | ||
| }, | ||
| "eslintConfig": { | ||
| "extends": "react-app" | ||
| }, | ||
| "browserslist": { | ||
| "production": [ | ||
| ">0.2%", | ||
| "not dead", | ||
| "not op_mini all" | ||
| ], | ||
| "development": [ | ||
| "last 1 chrome version", | ||
| "last 1 firefox version", | ||
| "last 1 safari version" | ||
| ] | ||
| } | ||
| } |
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|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| <!DOCTYPE html> | ||
| <html lang="en"> | ||
| <head> | ||
| <meta charset="utf-8" /> | ||
| <link rel="icon" href="%PUBLIC_URL%/favicon.ico" /> | ||
| <meta name="viewport" content="width=device-width, initial-scale=1" /> | ||
| <meta name="theme-color" content="#000000" /> | ||
| <meta | ||
| name="description" | ||
| content="Web site created using create-react-app" | ||
| /> | ||
| <title>React App</title> | ||
| </head> | ||
| <body> | ||
| <div id="root"></div> | ||
| </body> | ||
| </html> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,11 @@ | ||
| import React from 'react'; | ||
| import Calculator from './Calculator'; | ||
|
|
||
| const App = () => ( | ||
| <div className="App"> | ||
| <h1>Calculator</h1> | ||
| <Calculator /> | ||
| </div> | ||
| ); | ||
|
|
||
| export default App; |
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| Original file line number | Diff line number | Diff line change |
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| import React from "react"; | ||
|
|
||
| class Calculator extends React.Component { | ||
| constructor(props) { | ||
| super(props); | ||
| this.state = { | ||
| result: 0, | ||
| num1: "", | ||
| num2: "", | ||
| }; | ||
| } | ||
|
|
||
| handleFirstNum = e => { | ||
| const parsedNum = parseInt(e.target.value, 10); | ||
| const num1 = isNaN(parsedNum) ? "" : parsedNum; | ||
| this.setState({ num1 }); | ||
| } | ||
|
|
||
| handleSecondNum = e => { | ||
| const parsedNum = parseInt(e.target.value, 10); | ||
| const num2 = isNaN(parsedNum) ? "" : parsedNum; | ||
| this.setState({ num2 }); | ||
| } | ||
|
|
||
| add = () => { | ||
| const result = this.state.num1 + this.state.num2; | ||
| this.setState({ result }); | ||
| } | ||
|
|
||
| subtract = () => { | ||
| const result = this.state.num1 - this.state.num2; | ||
| this.setState({ result }); | ||
| } | ||
|
|
||
| multiply = () => { | ||
| const result = this.state.num1 * this.state.num2; | ||
| this.setState({ result }); | ||
| } | ||
|
|
||
| divide = () => { | ||
| const result = this.state.num1 / this.state.num2; | ||
| this.setState({ result }); | ||
| } | ||
|
|
||
| clear = () => { | ||
| this.setState({ num1: "", num2: "", result: 0 }); | ||
| } | ||
|
|
||
| render() { | ||
| const { num1, num2, result } = this.state; | ||
| return ( | ||
| <div> | ||
| <h1>Result: {result}</h1> | ||
| <input onChange={this.handleFirstNum} value={num1} placeholder="First number" /> | ||
| <input onChange={this.handleSecondNum} value={num2} placeholder="Second number" /> | ||
| <br /> | ||
| <button onClick={this.add}>+</button> | ||
| <button onClick={this.subtract}>-</button> | ||
| <button onClick={this.multiply}>*</button> | ||
| <button onClick={this.divide}>/</button> | ||
| <button onClick={this.clear}>Clear</button> | ||
| </div> | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| export default Calculator; |
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| Original file line number | Diff line number | Diff line change |
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| import React from 'react'; | ||
| import ReactDOM from 'react-dom'; | ||
| import App from './App'; | ||
|
|
||
| ReactDOM.render( | ||
| <React.StrictMode> | ||
| <App /> | ||
| </React.StrictMode>, | ||
| document.getElementById('root') | ||
| ); |
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