React component not showing - javascript

I'm trying out the examples in a book called Fullstack React. I don't know why the Product component isn't showing. I'm also a newbie to React and StackOverflow. Sorry for the mistakes I might make.
class Product extends React.component {
render() {
return (
<div className='item'>
<div className='image'>
<img src='images/products/image-aqua.png' />
</div>
<div className='middle aligned content'>
<div className='description'>
<a> Fort Knight </a>
<p> Authentic renaissance actors, delivered in just two weeks.</p>
</div>
<div className='extra'>
<span> Submitted by:</span>
<img
className='ui avatar image'
src='images/avatars/daniel.png'
/>
</div>
</div>
</div>
);
}
}
class ProductList extends React.Component {
render() {
return (
<div className='ui unstackable items'>
<Product />
</div>
);
}
}
And it also uses the semantic framework.

React.component should be React.Component
You can also import Component at the same time as main React, e.g.
import React, { Component } from 'react'

Related

Nested react component not rendering been stuck for hours

I'm just getting started with react and javascript development in general, i'm trying to nest a component. The Home component is rendering fine, the testComp is not showing up, very stuck pls help. Thanks!
home.component.js
import React, { Component } from 'react';
import "bootstrap/dist/css/bootstrap.min.css";
import testComp from "./test.component";
export default class Home extends Component {
render() {
return (
<div class="container-fluid">
<div class="row">
<div class="col-sm">
<testComp />
</div>
<div class="col-sm">
One of four columns
</div>
<div class="col-sm">
One of four columns
</div>
<div class="col-sm">
One of four columns
</div>
</div>
</div>
);
}
}
test.component.js
import React, { Component } from 'react';
import "bootstrap/dist/css/bootstrap.min.css";
export default class testComp extends Component {
render() {
return (
<p> TEST TEXT </p>
);
}
}
This may seem weird at first, but you have to use a capital letter at the start of the component. Try changing to:
export default class TestComp extends Component {
render() {
return (
<p> TEST TEXT </p>
);
}
}
and inside home component:
import TestComp from "./test.component";
<div class="col-sm">
<TestComp />
</div>
You will see the component renders. Here is a codesandbox example of the working case. You can read more about it

Add style to the imported component is React

I have one independent component 'notification' with its own CSS style. I want to show the notification component in my header component but with different styling. I imported the component in the header, but I unable to add style on it. Please help. I didn't want to change the notification component local style as it broke the notification functionality.
Code for importing notification component.
import React from 'react';
import bell from '../../../assets/icons/bell.svg';
import NotificationList from '../notification/NotificationList';
class Search extends React.Component{
constructor()
{
super()
this.state={
notificationStatus:false
}
}
render()
{
const style={
position:'absolute',
top:'70px',
left:'0px',
width:'100%',
height:'auto',
zindex:'2'
}
return(
<div className="col-md-8 col-sm-8">
<div className="row">
<div className="col-md-11 col-sm-11 search-container">
<input type="text" className="form-control" name="search" placeholder="Search" />
<i className="fa fa-search"></i>
</div>
<div className="col-md-1 col-sm-1 bell-container flex all-center relative">
<img src={bell} alt="bell icon" />
</div>
</div>
<NotificationList style={style} className="notification-component" />
</div>
)
}
}
export default Search;
Notification list component
import React from 'react';
class NotificationList extends React.Component{
constructor(props)
{
super(props)
this.state={
}
}
render()
{
const title={
marginBottom:'0px'
}
return(
<div className="col-md-10 col-md-offsest-1 default-shadow offset-md-1 bg-white pd-10-0 border-radius-10">
<div className="row">
<div className="col-md-12 flex pd-10-0 notification-main-block">
<div className="col-md-11">
<p className="paragraph" style={title}>Notification title comes here.</p>
<p className="small-paragraph" style={title}>2 min ago</p>
</div>
</div>
<div className="col-md-12 flex pd-10-0 notification-main-block">
<div className="col-md-11">
<p className="paragraph" style={title}>Notification title comes here.</p>
<p className="small-paragraph" style={title}>2 min ago</p>
</div>
</div>
<div className="col-md-12 flex pd-10-0 notification-main-block">
<div className="col-md-11">
<p className="paragraph" style={title}>Notification title comes here.</p>
<p className="small-paragraph" style={title}>2 min ago</p>
</div>
</div>
</div>
</div>
)
}
}
export default NotificationList;
I see you have included the style prop in your notification component,
<NotificationList style={style} className="notification-component" />
But you forgot to apply it again in your own export component Notification list component
(I tend to forget sometime, it happened to the best of us.)
<div style={this.props.style} className="col-md-10 col-md-offsest-1 default-shadow offset-md-1 bg-white pd-10-0 border-radius-10">
I highly recommend styled-components for dealing with this styling stuff. Check it out here
Edited:
After reading again, I see you misunderstand a little bit of the style,
you can apply style on most primitive html component, such as div, span, section and etc. But when it comes to component, the style actually will not automatically applied, it is purposely designed that way, and the style will be goes to you props. You have to apply it again.
Example:
const Parent = ()=>{
return (
<div>
<MyCustomChild style={{fontSize:10}}>Some text</MyCustomChild>
</div>
)
}
export const MyCustomChild = (/* Properties */ props)=>
{
const {style, children} = props // extract your 'applied' property
return (
<div style={style /* passing it here */}>
{children}
</div>
)
}
You have only passed style but not used in Notification component.
You can access it using props which in your case is this.props.style.
Ex.
<div style={this.props.style} className="col-md-10 col-md-offsest-1 default-shadow offset-md-1 bg-white pd-10-0 border-radius-10">

how to show specific post details by clicking using react-router-parameters?

I'm using map to view all posts using axios. And I just want show when I click a specific post to see more information. I'm using react parameters. But it's not working.
Here is my one component
import React, {Component} from 'react';
import Album from './album'
import {Link, BrowserRouter as Router, Route} from 'react-router-dom'
import axios from "axios"
class ViewDataAPI extends Component{
state = {
posts: []
}
componentDidMount(){
axios.get('https://jsonplaceholder.typicode.com/comments')
.then(response => {
this.setState({
posts: response.data
})
})
.catch(error => console.log('error'))
}
render(){
let { posts } = this.state
if(posts.length === 0){
return <h1>Loading...</h1>
}
else{
return(
<Router>
<div className="header">
<div className="container">
<div className="row">
<div className="col-lg-12 col-sm-12 col-xs-12">
<div className="text-center mb-20">
<h1>View Data From API</h1>
<p>using jsx-component, props, state, map in react </p>
</div>
</div>
</div>
<div className="row">
{
posts.map(post =>
{
return (
<Album
key={post.id}
name={post.name}
email = {post.email}
body = {post.body}
view = {post.id}
/>
)
}
)
}
</div>
{/* here is im using params, and to match by clicking specific id to show/view more information */}
<div className="row">
{posts && (
<Route path="/album/:albumId"
render = {({match}) => (
<ViewPosts {...posts.find(pv => pv.id === match.params.albumId)} />
)}
/>
)}
</div>
</div>
</div>
</Router>
)
}
}
}
export default ViewDataAPI;
// This component using for show details
const ViewPosts = ({posts}) =>{
return(
<div className="col-lg-6">
<div className="card border-dark mb-3">
<div className="card-body text-dark">
<div className="album">
<h3>{posts.name}</h3>
<h3>{posts.email}</h3>
<Link to="./">Back To Home</Link>
</div>
</div>
</div>
</div>
);
}
This is album component that has a link
import React, {Component} from 'react'
import {Link} from "react-router-dom"
class Album extends Component{
render(){
return(
<div className="col-lg-6">
<div className="card border-dark mb-3">
<div className="card-body text-dark">
<div className="album">
<h3>{this.props.name}</h3>
<p>{this.props.email}</p>
<p>{this.props.body}</p>
<Link to={`/album/${this.props.view}`}>View</Link>
</div>
</div>
</div>
</div>
);
}
}
export default Album;
https://react-pin.netlify.com/
Please follow the above link to what I'm trying to do. Please first go to one "View Data From API"
My github link https://github.com/sultan0/reactpin
The route param is a string. There is no implicit type conversion
with === Operator. Therefore you have to do it explicitly. Pls. see
Comparison operators for a further explanation.
The spread ... Operator is misplaced here.
The solution is:
<ViewPosts posts={posts.find(pv => pv.id === parseInt(match.params.albumId))} />
Update
You would like to use the Switch component from react router:
Switch is unique in that it renders a route exclusively. In contrast, every Route that matches the location renders inclusively.
Pls refer to react router documentation.
I created a pull request as an example. Hope it helps.

Building a small site in React with one module VS in Html/css/js

I'm new to React.. If I load all my content like so in App.js in the React framework (all as one component). I'm guessing I'm not really using React in the proper way. But does this one component for a whole website approach have any advantage/disadvantage over building it in the normal HTML/CSS/JS format? Would this actually be slower as a site ?
import React, { Component } from 'react';
import WebFont from 'webfontloader';
import urban_tribal_stfregular from './fonts/urban_tribal_stfregular.ttf';
import urban_brush_zoneregular from './fonts/urban_brush_zoneregular.ttf';
import urbanpaintsregular from './fonts/urbanpaintsregular.ttf';
import urbantrailsregular from './fonts/urbantrailsregular.ttf';
import urbanposterregular from './fonts/urbanposterregular.ttf';
import urban_rubberregular from './fonts/urban_rubberregular.ttf';
import logo from './img/logo.png';
import leaf from './img/leaf.png';
import hq from './img/hq.png';
import eyeSprinkle from './img/eye-sprinkle.png';
import docturDotHead from './img/doctur-dot-head.png';
import johnnyVenus from './img/johnny-venus.png';
import pyramid from './img/pyramid.png';
import goldElevator from './img/gold-elevator.png';
import demon from './img/demon.png';
import sword from './img/sword.png';
import stage1 from './img/stage-1.png';
import stage1Fire1 from './img/stage-1-fire-1.png';
import stage1Fire2 from './img/stage-1-fire-2.png';
import stage2Fire1 from './img/stage-2-fire-1.png';
import cloud1 from './img/cloud-1.png';
import cloud2 from './img/cloud-2.png';
import stage2 from './img/stage-2.png';
import footerShim from './img/840.png';
import footer from './img/footer.png';
import './App.css';
const styles = {
urban_tribal_stfregular: {
fontFamily: 'urban_tribal_stfregular'
},
urban_brush_zoneregular: {
fontFamily: 'urban_brush_zoneregular'
},
urbanpaintsregular: {
fontFamily: 'urbanpaintsregular'
},
urbantrailsregular: {
fontFamily: 'urbantrailsregular'
},
urbanposterregular: {
fontFamily: 'urbanposterregular'
}
};
// CONFIG OBJECT TO PASS TO HOC
class App extends Component {
render() {
let projectTitle = 'Earthgang'
return (
<div className="App">
<div className="background-enhance">
<header className="App-header">
<div style={{flexDirection:"row"}}>
{/* new wrap for dat perspective ting */}
<div className="wrap">
<div className="bg">
{/* perspective level 1 (back)*/}
<div style={{ position: "absolute", width: "100%" }}>
<div className="plate">
<br />
</div>
<img src={hq} className="hq" alt="HQ" />
<div id="imageEye" className="spriteEye"></div>
<img src={leaf} className="leaf" alt="weed" />
<img src={leaf} className="leaf leaf_right" alt="grass" />
</div>
<div className="bg">
{/* perspective level 2*/}
<div id="imageHeadJohny" className="spriteHeadJohny"></div>
<div id="imageHeadDot" className="spriteHeadDot"></div>
<div className="bg">
{/* perspective level 3*/}
<img alt="" id="myButtn" className="logoTop" src={logo} />
<div className="pyramid-box">
<img src={pyramid} className="pyramid" alt="pyramid" />
<img src={goldElevator} className="gold-elevator" alt="pain profit" />
<img src={eyeSprinkle} className="eye-sprinkle" alt="eye" />
<img src={demon} className="demon" alt="demon" />
<div className="stages stage-1-box">
<img src={stage1}className="stage-1" alt="Stage 1" />
<img src={stage1Fire1} className="stage-1-fire-1" alt="Stage 1 Fire 1" />
<img src={stage1Fire2} className="stage-1-fire-2" alt="Stage 1 Fire 2" />
</div>
<div className="stages stage-2-box">
<img src={stage2} className="stage-2" alt="Stage 2" />
<img src={stage2Fire1} className="stage-2-fire-1" alt="Stage 2 Fire 1" />
</div>
</div>
<div id="imageApe" className="spriteApe"></div>
<div id="imageHyena" className="spriteHyena"></div>
</div>
</div>
</div>
</div>
{/* End of new wrap for dat perspective ting */}
</div>
</header>
<div id="footer1">
</div>
<div id="footer2">
<p>Footer (or other) content here</p>
</div>
<div style={{flexDirection:"row"}}>
<div>
</div>
</div>
</div>
</div>
);
}
}
export default App;
Well , this is entirely just my own opinion which may be wrong .
If you are building with this single component website approach , then there is no need to use react really . You are just loading extra 57 kb or something according to this link React file size since you are not loading extra libraries.
But obviously maintaining this would not be an easy job and you are better off using react features to make you life easier and make the app scalable

Why does the twitter widget not re-render reactjs

I am using the twitter embedded timeline on my application to show the twitter feed of a companies twitter account.
When I get a result from an API, the state changes to the correct values, but the twitter widget does not appear to change
TwitterCard.js
import React from "react";
export class TwitterCard extends React.Component{
render() {
return (
<a className="twitter-timeline" href={this.props.href} data-height="100%">Tweets by {this.props.ticker}</a>
)
}
}
I have attached screenshots of the react plugin output for proof of state change.
The parent class is rather large, so I have posted the render method:
render() {
return (
<div>
<NavBar/>
<div className="container-fluid">
<div className="row">
<NavBarSide clickHandler={(url) => this.handleNavClick(url)}/>
<Dashboard
errorChart={this.state.errorChart}
twitter={this.state.twitter}
status={this.state.status}
/>
</div>
</div>
</div>
)
}
The parent passes these values to the Dashboard:
import React from "react";
import { Switch, Route } from 'react-router-dom';
import { Chart } from "./Chart";
import { TwitterCard } from "./TwitterCard";
export class Dashboard extends React.Component {
render() {
return (
<div className="col-md-9 ml-sm-auto col-lg-10 pt-2 px-3">
<div className="row">
<div className="col-lg-8">
<div className="row">
<div className="col-lg-6">
<div className="card border-0">
<div className="card-body">
<Chart chart={this.props.errorChart}/>
</div>
</div>
</div>
</div>
</div>
<div className="col-lg-4">
<TwitterCard href={this.props.twitter} ticker={this.props.ticker}/>
</div>
</div>
</div>
)
}
}
You can force an update to the twitter component when the ticket changes by keying it with the ticker where you render it in your dashboard component:
<TwitterCard
key={this.props.ticker}
href={this.props.twitter}
ticker={this.props.ticker}
/>

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