Asabeneh
5 years ago
parent
56f5f03913
commit
fc36b2a400
@ -1,7 +1,6 @@
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draft.md
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react-for-everyone.md
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component.md
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09_Day_Conditional_Rendering
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10_Day_Events
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11_Day_Forms
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@ -0,0 +1,790 @@
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<div align="center">
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<h1> 30 Days Of React: Conditional Rendering</h1>
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<a class="header-badge" target="_blank" href="https://www.linkedin.com/in/asabeneh/">
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<img src="https://img.shields.io/badge/style--5eba00.svg?label=LinkedIn&logo=linkedin&style=social">
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</a>
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<a class="header-badge" target="_blank" href="https://twitter.com/Asabeneh">
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<img alt="Twitter Follow" src="https://img.shields.io/twitter/follow/asabeneh?style=social">
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</a>
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<sub>Author:
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<a href="https://www.linkedin.com/in/asabeneh/" target="_blank">Asabeneh Yetayeh</a><br>
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<small> October, 2020</small>
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</sub>
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</div>
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[<< Day 8](../08_Day_States/08_states.md) | [Day 10 >>](../10_Day_Events/10_events.md)
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# Conditional Rendering
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As we can understand from the term, conditional rendering is a way to render different JSX or component at different condition. We can implement conditional rendering using regular if and else statement, ternary operator and &&. Let's implement a different conditional rendering.
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## Conditional Rendering using If and Else statement
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In the code below, we have an initial state of loggedIn which is false. If the state is false we inform user to log in otherwise we welcome the user.
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```js
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// index.js
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import React from 'react'
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import ReactDOM from 'react-dom'
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// class based component
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class Header extends React.Component {
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render() {
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console.log(this.props.data)
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const {
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welcome,
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title,
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subtitle,
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author: { firstName, lastName },
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date,
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} = this.props.data
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return (
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<header style={this.props.styles}>
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<div className='header-wrapper'>
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<h1>{welcome}</h1>
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<h2>{title}</h2>
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<h3>{subtitle}</h3>
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<p>
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{firstName} {lastName}
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</p>
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<small>{date}</small>
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<p>Select a country for your next holiday</p>
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</div>
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</header>
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)
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}
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}
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class App extends React.Component {
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state = {
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loggedIn: false,
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}
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render() {
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const data = {
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welcome: '30 Days Of React',
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title: 'Getting Started React',
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subtitle: 'JavaScript Library',
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author: {
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firstName: 'Asabeneh',
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lastName: 'Yetayeh',
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},
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date: 'Oct 7, 2020',
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}
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// conditional rendering using if and else statement
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let status
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if (this.state.loggedIn) {
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status = <h3>Welcome to 30 Days Of React</h3>
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} else {
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status = <h3>Please Login</h3>
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}
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return (
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<div className='app'>
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{this.state.backgroundColor}
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<Header data={data} />
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{status}
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</div>
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)
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}
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}
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const rootElement = document.getElementById('root')
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ReactDOM.render(<App />, rootElement)
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```
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Let's add a method which allow as to toggle the status of the user. We should have a button to handle event for logging in and logging out.
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```js
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// index.js
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import React from 'react'
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import ReactDOM from 'react-dom'
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// A button component
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const Button = ({ text, onClick, style }) => (
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<button style={style} onClick={onClick}>
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{text}
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</button>
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)
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// CSS styles in JavaScript Object
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const buttonStyles = {
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backgroundColor: '#61dbfb',
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padding: 10,
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border: 'none',
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borderRadius: 5,
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margin: 3,
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cursor: 'pointer',
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fontSize: 22,
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color: 'white',
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margin: '0 auto',
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}
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// class based component
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class Header extends React.Component {
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render() {
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console.log(this.props.data)
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const {
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welcome,
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title,
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subtitle,
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author: { firstName, lastName },
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date,
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} = this.props.data
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return (
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<header style={this.props.styles}>
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<div className='header-wrapper'>
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<h1>{welcome}</h1>
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<h2>{title}</h2>
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<h3>{subtitle}</h3>
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<p>
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{firstName} {lastName}
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</p>
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<small>{date}</small>
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</div>
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</header>
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)
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}
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}
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class App extends React.Component {
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state = {
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loggedIn: false,
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}
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handleLogin = () => {
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this.setState({
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loggedIn: !this.state.loggedIn,
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})
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}
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render() {
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const data = {
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welcome: '30 Days Of React',
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title: 'Getting Started React',
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subtitle: 'JavaScript Library',
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author: {
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firstName: 'Asabeneh',
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lastName: 'Yetayeh',
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},
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date: 'Oct 9, 2020',
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}
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let status
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let text
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if (this.state.loggedIn) {
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status = <h1>Welcome to 30 Days Of React</h1>
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text = 'Logout'
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} else {
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status = <h3>Please Login</h3>
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text = 'Login'
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}
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return (
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<div className='app'>
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{this.state.backgroundColor}
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<Header data={data} />
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{status}
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<Button text={text} style={buttonStyles} onClick={this.handleLogin} />
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</div>
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)
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}
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}
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const rootElement = document.getElementById('root')
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ReactDOM.render(<App />, rootElement)
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```
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How about if our condition is more than two? Like pure JavaScript we can use if else if statement. In general, conditional rendering is not different from pure JavaScript conditional statement.
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## Conditional Rendering using Ternary Operator
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Ternary operator is an an alternative for if else statement. However, there is more use cases for ternary operator than if else statement. For example, use can use ternary operator inside styles, className or many places in a component than regular if else statement.
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```js
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// index.js
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import React from 'react'
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import ReactDOM from 'react-dom'
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// A button component
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const Button = ({ text, onClick, style }) => (
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<button style={style} onClick={onClick}>
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{text}
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</button>
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)
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// CSS styles in JavaScript Object
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const buttonStyles = {
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backgroundColor: '#61dbfb',
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padding: 10,
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border: 'none',
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borderRadius: 5,
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margin: 3,
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cursor: 'pointer',
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fontSize: 22,
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color: 'white',
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margin: '0 auto',
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}
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// class based component
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class Header extends React.Component {
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render() {
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console.log(this.props.data)
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const {
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welcome,
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title,
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subtitle,
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author: { firstName, lastName },
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date,
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} = this.props.data
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return (
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<header style={this.props.styles}>
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<div className='header-wrapper'>
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<h1>{welcome}</h1>
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<h2>{title}</h2>
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<h3>{subtitle}</h3>
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<p>
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{firstName} {lastName}
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</p>
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<small>{date}</small>
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</div>
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</header>
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)
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}
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}
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class App extends React.Component {
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state = {
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loggedIn: false,
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}
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handleLogin = () => {
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this.setState({
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loggedIn: !this.state.loggedIn,
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})
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}
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render() {
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const data = {
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welcome: '30 Days Of React',
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title: 'Getting Started React',
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subtitle: 'JavaScript Library',
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author: {
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firstName: 'Asabeneh',
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lastName: 'Yetayeh',
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},
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date: 'Oct 9, 2020',
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}
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let status = this.state.loggedIn ? (
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<h1>Welcome to 30 Days Of React</h1>
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) : (
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<h3>Please Login</h3>
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)
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return (
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<div className='app'>
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{this.state.backgroundColor}
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<Header data={data} />
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{status}
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<Button
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text={this.state.loggedIn ? 'Logout' : 'Login'}
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style={buttonStyles}
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onClick={this.handleLogin}
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/>
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</div>
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)
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}
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}
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const rootElement = document.getElementById('root')
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ReactDOM.render(<App />, rootElement)
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```
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In addition to JSX, we can also conditionally render a component. Let's change the above conditional JSX to a component.
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```js
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// index.js
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import React from 'react'
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import ReactDOM from 'react-dom'
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// A button component
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const Button = ({ text, onClick, style }) => (
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<button style={style} onClick={onClick}>
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{text}
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</button>
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)
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// CSS styles in JavaScript Object
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const buttonStyles = {
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backgroundColor: '#61dbfb',
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padding: 10,
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border: 'none',
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borderRadius: 5,
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margin: 3,
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cursor: 'pointer',
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fontSize: 22,
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color: 'white',
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margin: '0 auto',
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}
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// class based component
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class Header extends React.Component {
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render() {
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console.log(this.props.data)
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const {
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welcome,
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title,
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subtitle,
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author: { firstName, lastName },
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date,
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} = this.props.data
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return (
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<header style={this.props.styles}>
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<div className='header-wrapper'>
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<h1>{welcome}</h1>
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<h2>{title}</h2>
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<h3>{subtitle}</h3>
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<p>
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{firstName} {lastName}
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</p>
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<small>{date}</small>
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</div>
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</header>
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)
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}
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}
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class App extends React.Component {
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state = {
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loggedIn: false,
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}
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handleLogin = () => {
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this.setState({
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loggedIn: !this.state.loggedIn,
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})
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}
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render() {
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const data = {
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welcome: '30 Days Of React',
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title: 'Getting Started React',
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subtitle: 'JavaScript Library',
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author: {
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firstName: 'Asabeneh',
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lastName: 'Yetayeh',
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},
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date: 'Oct 9, 2020',
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}
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const Login = () => (
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<div>
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<h3>Please Login</h3>
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</div>
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)
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const Welcome = (props) => (
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<div>
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<h1>Welcome to 30 Days Of React</h1>
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</div>
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)
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const status = this.state.loggedIn ? <Welcome /> : <Login />
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return (
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<div className='app'>
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{this.state.backgroundColor}
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<Header data={data} />
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{status}
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<Button
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text={this.state.loggedIn ? 'Logout' : 'Login'}
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style={buttonStyles}
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onClick={this.handleLogin}
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/>
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</div>
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)
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}
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}
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const rootElement = document.getElementById('root')
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ReactDOM.render(<App />, rootElement)
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```
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## Conditional Rendering using && Operator
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The && operator render the right JSX operand if the left operand(expression) is true.
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```js
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// index.js
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import React from 'react'
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import ReactDOM from 'react-dom'
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// A button component
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const Button = ({ text, onClick, style }) => (
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<button style={style} onClick={onClick}>
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{text}
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</button>
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)
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// CSS styles in JavaScript Object
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const buttonStyles = {
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backgroundColor: '#61dbfb',
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padding: 10,
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border: 'none',
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borderRadius: 5,
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margin: 3,
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cursor: 'pointer',
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fontSize: 22,
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color: 'white',
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margin: '0 auto',
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}
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// class based component
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class Header extends React.Component {
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render() {
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console.log(this.props.data)
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const {
|
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welcome,
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title,
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subtitle,
|
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author: { firstName, lastName },
|
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date,
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} = this.props.data
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return (
|
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<header style={this.props.styles}>
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<div className='header-wrapper'>
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<h1>{welcome}</h1>
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<h2>{title}</h2>
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<h3>{subtitle}</h3>
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<p>
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{firstName} {lastName}
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</p>
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<small>{date}</small>
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</div>
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</header>
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)
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}
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}
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const Login = () => (
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<div>
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<h3>Please Login</h3>
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</div>
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)
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const Welcome = (props) => (
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<div>
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<h1>Welcome to 30 Days Of React</h1>
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</div>
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)
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class App extends React.Component {
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state = {
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loggedIn: false,
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techs: ['HTML', 'CSS', 'JS'],
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}
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handleLogin = () => {
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this.setState({
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loggedIn: !this.state.loggedIn,
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})
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}
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render() {
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const data = {
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welcome: '30 Days Of React',
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title: 'Getting Started React',
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subtitle: 'JavaScript Library',
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author: {
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firstName: 'Asabeneh',
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lastName: 'Yetayeh',
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},
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date: 'Oct 9, 2020',
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}
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const status = this.state.loggedIn ? <Welcome /> : <Login />
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return (
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<div className='app'>
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{this.state.backgroundColor}
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<Header data={data} />
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{status}
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<Button
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text={this.state.loggedIn ? 'Logout' : 'Login'}
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style={buttonStyles}
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onClick={this.handleLogin}
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/>
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{this.state.techs.length === 3 && (
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<p>You have all the prerequisite courses to get started React</p>
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)}
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{!this.state.loggedIn && (
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<p>
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Please login to access more information about 30 Days Of React
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||||
challenge
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</p>
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)}
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</div>
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)
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}
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}
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const rootElement = document.getElementById('root')
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ReactDOM.render(<App />, rootElement)
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```
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|
||||
In the previous section, we used alert box to greet people and also to display time. Let's render the greeting and time on browser DOM instead of displaying on alert box.
|
||||
|
||||
```js
|
||||
// index.js
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import React from 'react'
|
||||
import ReactDOM from 'react-dom'
|
||||
|
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// class based component
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||||
class Header extends React.Component {
|
||||
render() {
|
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console.log(this.props.data)
|
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const {
|
||||
welcome,
|
||||
title,
|
||||
subtitle,
|
||||
author: { firstName, lastName },
|
||||
date,
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||||
} = this.props.data
|
||||
|
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return (
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||||
<header style={this.props.styles}>
|
||||
<div className='header-wrapper'>
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||||
<h1>{welcome}</h1>
|
||||
<h2>{title}</h2>
|
||||
<h3>{subtitle}</h3>
|
||||
<p>
|
||||
{firstName} {lastName}
|
||||
</p>
|
||||
<small>{date}</small>
|
||||
</div>
|
||||
</header>
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
const Message = ({ message }) => (
|
||||
<div>
|
||||
<h1>{message}</h1>
|
||||
</div>
|
||||
)
|
||||
const Login = () => (
|
||||
<div>
|
||||
<h3>Please Login</h3>
|
||||
</div>
|
||||
)
|
||||
const Welcome = (props) => (
|
||||
<div>
|
||||
<h1>Welcome to 30 Days Of React</h1>
|
||||
</div>
|
||||
)
|
||||
|
||||
// A button component
|
||||
const Button = ({ text, onClick, style }) => (
|
||||
<button style={style} onClick={onClick}>
|
||||
{text}
|
||||
</button>
|
||||
)
|
||||
|
||||
// TechList Component
|
||||
// class base component
|
||||
class TechList extends React.Component {
|
||||
render() {
|
||||
const { techs } = this.props
|
||||
const techsFormatted = techs.map((tech) => <li key={tech}>{tech}</li>)
|
||||
return techsFormatted
|
||||
}
|
||||
}
|
||||
|
||||
// Main Component
|
||||
// Class Component
|
||||
class Main extends React.Component {
|
||||
render() {
|
||||
const {
|
||||
techs,
|
||||
greetPeople,
|
||||
handleTime,
|
||||
loggedIn,
|
||||
handleLogin,
|
||||
message,
|
||||
} = this.props
|
||||
console.log(message)
|
||||
|
||||
const status = loggedIn ? <Welcome /> : <Login />
|
||||
return (
|
||||
<main>
|
||||
<div className='main-wrapper'>
|
||||
<p>Prerequisite to get started react.js:</p>
|
||||
<ul>
|
||||
<TechList techs={this.props.techs} />
|
||||
</ul>
|
||||
{techs.length === 3 && (
|
||||
<p>You have all the prerequisite courses to get started React</p>
|
||||
)}
|
||||
<div>
|
||||
<Button
|
||||
text='Show Time'
|
||||
onClick={handleTime}
|
||||
style={buttonStyles}
|
||||
/>{' '}
|
||||
<Button
|
||||
text='Greet People'
|
||||
onClick={greetPeople}
|
||||
style={buttonStyles}
|
||||
/>
|
||||
{!loggedIn && <p>Please login to access more information about 30 Days Of React challenge</p>}
|
||||
</div>
|
||||
<div style={{ margin: 30 }}>
|
||||
<Button
|
||||
text={loggedIn ? 'Logout' : 'Login'}
|
||||
style={buttonStyles}
|
||||
onClick={handleLogin}
|
||||
/>
|
||||
<br />
|
||||
{status}
|
||||
</div>
|
||||
<Message message={message} />
|
||||
</div>
|
||||
</main>
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
// CSS styles in JavaScript Object
|
||||
const buttonStyles = {
|
||||
backgroundColor: '#61dbfb',
|
||||
padding: 10,
|
||||
border: 'none',
|
||||
borderRadius: 5,
|
||||
margin: 3,
|
||||
cursor: 'pointer',
|
||||
fontSize: 22,
|
||||
color: 'white',
|
||||
margin: '0 auto',
|
||||
}
|
||||
|
||||
// Footer Component
|
||||
// Class component
|
||||
class Footer extends React.Component {
|
||||
constructor(props) {
|
||||
super(props)
|
||||
}
|
||||
render() {
|
||||
return (
|
||||
<footer>
|
||||
<div className='footer-wrapper'>
|
||||
<p>Copyright {this.props.date.getFullYear()}</p>
|
||||
</div>
|
||||
</footer>
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
class App extends React.Component {
|
||||
state = {
|
||||
loggedIn: false,
|
||||
techs: ['HTML', 'CSS', 'JS'],
|
||||
message: 'Click show time or Greet people to change me',
|
||||
}
|
||||
handleLogin = () => {
|
||||
this.setState({
|
||||
loggedIn: !this.state.loggedIn,
|
||||
})
|
||||
}
|
||||
showDate = (time) => {
|
||||
const months = [
|
||||
'January',
|
||||
'February',
|
||||
'March',
|
||||
'April',
|
||||
'May',
|
||||
'June',
|
||||
'July',
|
||||
'August',
|
||||
'September',
|
||||
'October',
|
||||
'November',
|
||||
'December',
|
||||
]
|
||||
|
||||
const month = months[time.getMonth()].slice(0, 3)
|
||||
const year = time.getFullYear()
|
||||
const date = time.getDate()
|
||||
return `${month} ${date}, ${year}`
|
||||
}
|
||||
handleTime = () => {
|
||||
let message = this.showDate(new Date())
|
||||
this.setState({ message })
|
||||
}
|
||||
greetPeople = () => {
|
||||
let message = 'Welcome to 30 Days Of React Challenge, 2020'
|
||||
this.setState({ message })
|
||||
}
|
||||
|
||||
render() {
|
||||
const data = {
|
||||
welcome: '30 Days Of React',
|
||||
title: 'Getting Started React',
|
||||
subtitle: 'JavaScript Library',
|
||||
author: {
|
||||
firstName: 'Asabeneh',
|
||||
lastName: 'Yetayeh',
|
||||
},
|
||||
date: 'Oct 9, 2020',
|
||||
}
|
||||
const techs = ['HTML', 'CSS', 'JavaScript']
|
||||
|
||||
return (
|
||||
<div className='app'>
|
||||
{this.state.backgroundColor}
|
||||
<Header data={data} />
|
||||
|
||||
<Main
|
||||
techs={techs}
|
||||
handleTime={this.handleTime}
|
||||
greetPeople={this.greetPeople}
|
||||
loggedIn={this.state.loggedIn}
|
||||
handleLogin={this.handleLogin}
|
||||
message={this.state.message}
|
||||
/>
|
||||
|
||||
<Footer date={new Date()} />
|
||||
</div>
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
const rootElement = document.getElementById('root')
|
||||
ReactDOM.render(<App />, rootElement)
|
||||
```
|
||||
|
||||
## Exercises
|
||||
|
||||
### Exercises: Level 1
|
||||
|
||||
1. What is conditional rendering?
|
||||
2. How do you implement conditional rendering?
|
||||
3. Which method of conditional rendering do you prefer?
|
||||
|
||||
### Exercises: Level 2
|
||||
|
||||
Coming
|
||||
|
||||
### Exercises: Level 3
|
||||
|
||||
Coming
|
||||
|
||||
🎉 CONGRATULATIONS ! 🎉
|
||||
|
||||
[<< Day 8](../08_Day_States/08_states.md) | [Day 10 >>](../10_Day_Events/10_events.md)
|
||||
@ -0,0 +1,23 @@
|
||||
# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
|
||||
|
||||
# dependencies
|
||||
/node_modules
|
||||
/.pnp
|
||||
.pnp.js
|
||||
|
||||
# testing
|
||||
/coverage
|
||||
|
||||
# production
|
||||
/build
|
||||
|
||||
# misc
|
||||
.DS_Store
|
||||
.env.local
|
||||
.env.development.local
|
||||
.env.test.local
|
||||
.env.production.local
|
||||
|
||||
npm-debug.log*
|
||||
yarn-debug.log*
|
||||
yarn-error.log*
|
||||
@ -0,0 +1,5 @@
|
||||
# 30 Days of React App: Day 3
|
||||
|
||||
In the project directory, you can run to start the project
|
||||
|
||||
### `npm start`
|
||||
@ -0,0 +1,34 @@
|
||||
{
|
||||
"name": "30-days-of-react",
|
||||
"version": "0.1.0",
|
||||
"private": true,
|
||||
"dependencies": {
|
||||
"@testing-library/jest-dom": "^4.2.4",
|
||||
"@testing-library/react": "^9.3.2",
|
||||
"@testing-library/user-event": "^7.1.2",
|
||||
"react": "^16.13.1",
|
||||
"react-dom": "^16.13.1",
|
||||
"react-scripts": "3.4.3"
|
||||
},
|
||||
"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"
|
||||
]
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,111 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta charset="utf-8" />
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1" />
|
||||
<link
|
||||
href="https://fonts.googleapis.com/css?family=Montserrat:300,400,500|Roboto:300,400,500&display=swap"
|
||||
rel="stylesheet"
|
||||
/>
|
||||
<meta
|
||||
name="description"
|
||||
content="Web site created using create-react-app"
|
||||
/>
|
||||
|
||||
<title>30 Days Of React App</title>
|
||||
<style>
|
||||
|
||||
/* == General style === */
|
||||
|
||||
* {
|
||||
box-sizing: border-box;
|
||||
padding: 0;
|
||||
margin: 0;
|
||||
}
|
||||
|
||||
html,
|
||||
body {
|
||||
height: 100%;
|
||||
line-height: 1.5;
|
||||
font-family: 'Montserrat';
|
||||
font-weight: 300;
|
||||
color: black;
|
||||
}
|
||||
|
||||
.root {
|
||||
min-height: 100%;
|
||||
position: relative;
|
||||
}
|
||||
|
||||
.header-wrapper,
|
||||
.main-wrapper,
|
||||
.footer-wrapper {
|
||||
width: 85%;
|
||||
margin: auto;
|
||||
}
|
||||
|
||||
.header-wrapper,
|
||||
.main-wrapper {
|
||||
padding: 10px;
|
||||
margin: 2px auto;
|
||||
}
|
||||
|
||||
h1 {
|
||||
font-size: 70px;
|
||||
font-weight: 300;
|
||||
}
|
||||
|
||||
h2,
|
||||
h3 {
|
||||
font-weight: 300;
|
||||
}
|
||||
|
||||
header {
|
||||
background-color: #61dbfb;
|
||||
padding: 25;
|
||||
padding: 10px;
|
||||
}
|
||||
|
||||
main {
|
||||
padding: 10px;
|
||||
padding-bottom: 60px;
|
||||
/* Height of the footer */
|
||||
}
|
||||
|
||||
ul {
|
||||
margin-left: 15px;
|
||||
}
|
||||
|
||||
ul li {
|
||||
list-style: none;
|
||||
}
|
||||
|
||||
footer {
|
||||
position: absolute;
|
||||
bottom: 0;
|
||||
width: 100%;
|
||||
height: 60px;
|
||||
/* Height of the footer */
|
||||
background: #6cf;
|
||||
}
|
||||
|
||||
.footer-wrapper {
|
||||
font-weight: 400;
|
||||
text-align: center;
|
||||
line-height: 60px;
|
||||
}
|
||||
.user-card {
|
||||
margin-top: 10px;
|
||||
}
|
||||
.user-card > img {
|
||||
border-radius: 50%;
|
||||
width: 14%;
|
||||
}
|
||||
|
||||
</style>
|
||||
|
||||
</head>
|
||||
<body>
|
||||
<div id="root"></div>
|
||||
</body>
|
||||
</html>
|
||||
File diff suppressed because it is too large
Load Diff
@ -0,0 +1,13 @@
|
||||
export const tenHighestPopulation = [
|
||||
{ country: 'World', population: 7693165599 },
|
||||
{ country: 'China', population: 1377422166 },
|
||||
{ country: 'India', population: 1295210000 },
|
||||
{ country: 'United States of America', population: 323947000 },
|
||||
{ country: 'Indonesia', population: 258705000 },
|
||||
{ country: 'Brazil', population: 206135893 },
|
||||
{ country: 'Pakistan', population: 194125062 },
|
||||
{ country: 'Nigeria', population: 186988000 },
|
||||
{ country: 'Bangladesh', population: 161006790 },
|
||||
{ country: 'Russian Federation', population: 146599183 },
|
||||
{ country: 'Japan', population: 126960000 },
|
||||
]
|
||||
|
After Width: | Height: | Size: 20 KiB |
|
After Width: | Height: | Size: 82 KiB |
|
After Width: | Height: | Size: 18 KiB |
|
After Width: | Height: | Size: 12 KiB |
|
After Width: | Height: | Size: 40 KiB |
@ -0,0 +1,230 @@
|
||||
// index.js
|
||||
import React from 'react'
|
||||
import ReactDOM from 'react-dom'
|
||||
|
||||
// class based component
|
||||
class Header extends React.Component {
|
||||
render() {
|
||||
console.log(this.props.data)
|
||||
const {
|
||||
welcome,
|
||||
title,
|
||||
subtitle,
|
||||
author: { firstName, lastName },
|
||||
date,
|
||||
} = this.props.data
|
||||
|
||||
return (
|
||||
<header style={this.props.styles}>
|
||||
<div className='header-wrapper'>
|
||||
<h1>{welcome}</h1>
|
||||
<h2>{title}</h2>
|
||||
<h3>{subtitle}</h3>
|
||||
<p>
|
||||
{firstName} {lastName}
|
||||
</p>
|
||||
<small>{date}</small>
|
||||
</div>
|
||||
</header>
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
const Message = ({ message }) => (
|
||||
<div>
|
||||
<h1>{message}</h1>
|
||||
</div>
|
||||
)
|
||||
const Login = () => (
|
||||
<div>
|
||||
<h3>Please Login</h3>
|
||||
</div>
|
||||
)
|
||||
const Welcome = (props) => (
|
||||
<div>
|
||||
<h1>Welcome to 30 Days Of React</h1>
|
||||
</div>
|
||||
)
|
||||
|
||||
// A button component
|
||||
const Button = ({ text, onClick, style }) => (
|
||||
<button style={style} onClick={onClick}>
|
||||
{text}
|
||||
</button>
|
||||
)
|
||||
|
||||
// TechList Component
|
||||
// class base component
|
||||
class TechList extends React.Component {
|
||||
render() {
|
||||
const { techs } = this.props
|
||||
const techsFormatted = techs.map((tech) => <li key={tech}>{tech}</li>)
|
||||
return techsFormatted
|
||||
}
|
||||
}
|
||||
|
||||
// Main Component
|
||||
// Class Component
|
||||
class Main extends React.Component {
|
||||
render() {
|
||||
const {
|
||||
techs,
|
||||
greetPeople,
|
||||
handleTime,
|
||||
loggedIn,
|
||||
handleLogin,
|
||||
message,
|
||||
} = this.props
|
||||
console.log(message)
|
||||
|
||||
const status = loggedIn ? <Welcome /> : <Login />
|
||||
return (
|
||||
<main>
|
||||
<div className='main-wrapper'>
|
||||
<p>Prerequisite to get started react.js:</p>
|
||||
<ul>
|
||||
<TechList techs={this.props.techs} />
|
||||
</ul>
|
||||
{techs.length === 3 && (
|
||||
<p>You have all the prerequisite courses to get started React</p>
|
||||
)}
|
||||
<div>
|
||||
<Button
|
||||
text='Show Time'
|
||||
onClick={handleTime}
|
||||
style={buttonStyles}
|
||||
/>{' '}
|
||||
<Button
|
||||
text='Greet People'
|
||||
onClick={greetPeople}
|
||||
style={buttonStyles}
|
||||
/>
|
||||
{!loggedIn && (
|
||||
<p>
|
||||
Please login to access more information about 30 Days Of React
|
||||
challenge
|
||||
</p>
|
||||
)}
|
||||
</div>
|
||||
<div style={{ margin: 30 }}>
|
||||
<Button
|
||||
text={loggedIn ? 'Logout' : 'Login'}
|
||||
style={buttonStyles}
|
||||
onClick={handleLogin}
|
||||
/>
|
||||
<br />
|
||||
{status}
|
||||
</div>
|
||||
<Message message={message} />
|
||||
</div>
|
||||
</main>
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
// CSS styles in JavaScript Object
|
||||
const buttonStyles = {
|
||||
backgroundColor: '#61dbfb',
|
||||
padding: 10,
|
||||
border: 'none',
|
||||
borderRadius: 5,
|
||||
margin: 3,
|
||||
cursor: 'pointer',
|
||||
fontSize: 22,
|
||||
color: 'white',
|
||||
margin: '0 auto',
|
||||
}
|
||||
|
||||
// Footer Component
|
||||
// Class component
|
||||
class Footer extends React.Component {
|
||||
constructor(props) {
|
||||
super(props)
|
||||
}
|
||||
render() {
|
||||
return (
|
||||
<footer>
|
||||
<div className='footer-wrapper'>
|
||||
<p>Copyright {this.props.date.getFullYear()}</p>
|
||||
</div>
|
||||
</footer>
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
class App extends React.Component {
|
||||
state = {
|
||||
loggedIn: false,
|
||||
techs: ['HTML', 'CSS', 'JS'],
|
||||
message: 'Click show time or Greet people to change me',
|
||||
}
|
||||
handleLogin = () => {
|
||||
this.setState({
|
||||
loggedIn: !this.state.loggedIn,
|
||||
})
|
||||
}
|
||||
showDate = (time) => {
|
||||
const months = [
|
||||
'January',
|
||||
'February',
|
||||
'March',
|
||||
'April',
|
||||
'May',
|
||||
'June',
|
||||
'July',
|
||||
'August',
|
||||
'September',
|
||||
'October',
|
||||
'November',
|
||||
'December',
|
||||
]
|
||||
|
||||
const month = months[time.getMonth()].slice(0, 3)
|
||||
const year = time.getFullYear()
|
||||
const date = time.getDate()
|
||||
return `${month} ${date}, ${year}`
|
||||
}
|
||||
handleTime = () => {
|
||||
let message = this.showDate(new Date())
|
||||
this.setState({ message })
|
||||
}
|
||||
greetPeople = () => {
|
||||
let message = 'Welcome to 30 Days Of React Challenge, 2020'
|
||||
this.setState({ message })
|
||||
}
|
||||
|
||||
render() {
|
||||
const data = {
|
||||
welcome: '30 Days Of React',
|
||||
title: 'Getting Started React',
|
||||
subtitle: 'JavaScript Library',
|
||||
author: {
|
||||
firstName: 'Asabeneh',
|
||||
lastName: 'Yetayeh',
|
||||
},
|
||||
date: 'Oct 9, 2020',
|
||||
}
|
||||
const techs = ['HTML', 'CSS', 'JavaScript']
|
||||
|
||||
return (
|
||||
<div className='app'>
|
||||
{this.state.backgroundColor}
|
||||
<Header data={data} />
|
||||
|
||||
<Main
|
||||
techs={techs}
|
||||
handleTime={this.handleTime}
|
||||
greetPeople={this.greetPeople}
|
||||
loggedIn={this.state.loggedIn}
|
||||
handleLogin={this.handleLogin}
|
||||
message={this.state.message}
|
||||
/>
|
||||
|
||||
<Footer date={new Date()} />
|
||||
</div>
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
const rootElement = document.getElementById('root')
|
||||
ReactDOM.render(<App />, rootElement)
|
||||
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