I've been looking for about 2 hours into why I am not displaying any of the information to the page. I've console logged my response from a simple random quote api and it shows, Author: and Quote: in the console, however these are not appearing in my fields, All I am seeing is the button.
import React, { Component } from 'react';
import QuoteMachine from './Quotemachine';
const END_POINT = 'https://random-quote-
generator.herokuapp.com/api/quotes/random';
class App extends Component {
constructor(props) {
super(props);
this.state = {
quote: {
text: '',
author: ''
}
}
}
getQuote() {
fetch(END_POINT)
.then(response => response.json())
.then(response => {
this.setState = ({
quote: response
});
console.log(response);
})
}
componentDidMount() {
this.getQuote();
}
render() {
return (
<div className="App">
<div className="container">
<QuoteMachine quote= {this.state.quote} />
<button id="new-quote" className="primary-color-
background" onClick={() => this.getQuote()}>New quote</button>
</div>
</div>
);
}
}
export default App;
And then here is my Quotemachine.js
import React from 'react'
import PropTypes from 'prop-types';
const QuoteMachine = (props) => {
return (
<div className="quote-box">
<div className="text">
<span>{props.quote.text}</span>
</div>
<div className="author">
<span >{props.quote.author}</span>
</div>
</div>
);
};
QuoteMachine.propTypes = {
quote: PropTypes.object.isRequired
};
export default QuoteMachine;
It is only displaying the button, but the console.log shows
Object
author:
"Thomas Henry Huxley (1825-1895)"
quote:
"Try to learn something about everything and everything about something."
proto
:
Object
Install React Developer Tools plugin and check if your state is changing after the API call
Related
I'm attempting to render Markdown using 'react-markdown' and setting the content as state. This state is set in componentDidMount, and console logging the state successfully logs the content like so (it's just nonsense as this is an example while I set it up):
**Bold text**
*Italic text*
__Underlined text__
~~Strikethrough text~~
List
- Hello
Numbered list
1. Number one
Image
However, when I then try to render my content in my component, it just comes through as blank.... Which I can't figure out why it's happening.
Here's my component code:
import React, { Component } from 'react';
import Strapi from 'strapi-sdk-javascript/build/main';
import Moment from 'react-moment';
import Markdown from 'react-markdown';
import './blog.css';
import MainHeader from '../global/main-header'
import Footer from '../global/footer'
class IndividualBlogPost extends Component {
constructor(props) {
super(props)
this.state = {
title: '',
description: '',
datePosted: '',
content: '',
author: ''
}
}
async componentDidMount() {
const params = this.props.match.params.id
try {
const posts = await strapiInstance.getEntry('blog-posts', params)
this.setState({
title: posts.Title,
description: posts.Description,
datePosted: posts.created_at,
content: posts.Content,
author: `${posts.created_by.firstname} ${posts.created_by.lastname}`
})
console.log(this.state.content)
}
catch(err) {
console.log(err)
}
}
render() {
const content = this.state.content
return (
<div>
<MainHeader />
<section className="individual-blogpost-section">
<div className="individual-blogpost-container">
<h1 className="individual-blogpost-heading">{this.state.title}</h1>
<div className="individual-blogpost-author-datePosted">
<p className="individual-blog-post-title-paragraph">{this.state.author} | <Moment format="MMM Do YYYY">{this.state.datePosted}</Moment></p>
</div>
<h4 className="individual-blogpost-description">{this.state.description}</h4>
<div className="individual-blogpost-content">
<Markdown src={content} />
</div>
</div>
</section>
<Footer />
</div>
)
}
}
export default IndividualBlogPost
As you can hopefully see, I'm attempting to set a const named content as this.state.content, and then passing the source of the markdown in to the Markdown component.
This is the first time I'm using Markdown, so I'm probably doing something obviously wrong, but any help would be appreciated!
According to their documentation, the content is actually passed as children to Markdown.
So you can do this:
<div className="individual-blogpost-content">
<Markdown >
{content}
</Markdown>
</div>
i am add package npm i remarkable.
and wrote this code
import React from "react";
import { Remarkable } from "remarkable";
class MarkdownEditor extends React.Component {
constructor(props) {
super(props);
this.md = new Remarkable();
this.handleChange = this.handleChange.bind(this);
this.state = { value: "Hello, **world**!" };
}
handleChange(e) {
this.setState({ value: e.target.value });
}
getRawMarkup() {
return { __html: this.md.render(this.state.value) };
}
render() {
return (
<div className="MarkdownEditor">
<h3>Input</h3>
<label htmlFor="markdown-content">Enter some markdown</label>
<textarea
id="markdown-content"
onChange={this.handleChange}
defaultValue={this.state.value}
/>
<h3>Output</h3>
<div
className="content"
dangerouslySetInnerHTML={this.getRawMarkup()}
/>
</div>
);
}
}
export default MarkdownEditor;
Work Demo
I am writing a react application that outputs a list of books (image, title, category, and description).
My search bar and booklist are sibling components and the search bar will pass data to the booklist.
when clicking the search button, only "Sample Category" shows up but not anything else. There is no problem accessing the API and the data is not null.
Here is a sample API output: https://www.googleapis.com/books/v1/volumes?q=lordoftherings
My code is the following:
// App
import React, { Component } from 'react';
import Axios from 'axios';
import './App.css';
import SearchBar from './SearchBar';
import BookList from './BookList';
class App extends Component {
constructor(props) {
super(props);
this.state = {
books: []
};
this.search = this.search.bind(this);
}
search(title) {
const promise = Axios.get('https://www.googleapis.com/books/v1/volumes?q=' + title);
promise.then((response) => {
const books = response.data.items;
this.setState({ books: books });
console.log(this.state.books);
})
};
render() {
return (
<div className="App">
<SearchBar searchBooks = {this.search}/>
<BookList booklist = {this.state.books}/>
</div>
);
}
}
export default App;
// Search Bar
import React, { Component } from 'react';
import PropTypes from 'prop-types';
class SearchBar extends Component {
constructor(props) {
super(props);
this.state = { titleToSearch: 'harry potter' }
this.handleInputChange = this.handleInputChange.bind(this);
}
handleInputChange(e) {
this.setState({ titleToSearch: e.target.value });
};
render() {
return (
<form>
<input
type="text"
name="booksInput"
placeholder="Enter book title"
value={this.state.titleToSearch}
onChange={this.handleInputChange}
/>
<button type="button" onClick={() => this.props.searchBooks(this.state.titleToSearch)}>Search</button>
</form>
);
}
}
export default SearchBar;
// BookList
import React, { Component } from 'react';
class BookList extends Component {
render() {
const books = this.props.booklist;
return (
<div className="table">
{books.map((book) => {
console.log(book.id);
return (
<div className="box" key={book.id}>
<div className="img"><img src="assets/default-placeholder.jpg" alt="" /></div>
<div className="title">{book.title}</div>
<div className="category">Sample Category</div>
<div className="description">{book.description}</div>
</div>
);
})}
</div>
);
}
}
export default BookList;
In the sample code you provided, you're not actually dynamically outputting categories.
You've hard coded 'Sample category' in there.
book.category
...is not actually in the dataset.
There are categories which seem to be available under:
<div className="category">{book.volumeInfo.categories[0]}</div>
although you'll want to check if the array has length, and probably map or join each item in array to string.
just to be clear: the issue with your other fields is also that they're children of "volumeInfo"
I am trying to save the value of the button as a string.If i click residence button it will save the value in categoryName as 'residence' or 'commercial' and redirect to another page .I have built a Rest API in the backend to bind and save the value in database.The code is something like this
import React from 'react';
import PropTypes from 'prop-types';
import classNames from 'classnames';
class CustomizedButtons extends React.Component {
constructor(props) {
super(props);
this.state = {
apiUrl:config.publicRuntimeConfig.publicRuntimeConfigValue.apiUrl,
category: " ",
};
}
saveValue = () => {
console.log('savecategory');
axios.post( this.state.apiUrl+'/api/v1/leadsurvey/category', {
'categoryName':this.state.category,
}, {})
};
render() {
const { classes} = this.props;
return (
<div>
<div>
<p>What is the type of your property?</p>
<div>
<button onClick={() => this.saveValue()}>Residence</button>
<button onClick={() => this.saveValue()}>Commercial</button>
</div>
<div style={{marginTop: '90px'}}>
</div>
</div>
</div>
);
}
}
export default CustomizedButtons;
I am not getting how to make it work to bind and save.In case of saving form value i did something like this.
this.state = {
apiUrl:config.publicRuntimeConfig.publicRuntimeConfigValue.apiUrl,
FreeQuoteName :"",
};
this.handleFreeQuoteName = this.handleFreeQuoteName.bind(this);
saveFreeQuote = () => {
console.log('saveFreeQuote ...', this.state);
axios.post( this.state.apiUrl+'/api/v1/SalesLead/save', {
'name': this.state.FreeQuoteName,
}
}
handleFreeQuoteName(event) { this.setState({ FreeQuoteName: event.target.value }); }
<Form>
<p>Name*</p>
<input maxLength="30" onChange={this.handleFreeQuoteName} value={this.state.FreeQuoteName}
type="text" placeholder="Enter name here"/>
<div style={{textAlign:'center', marginTop:'35px', marginBottom:'22px'}} className={card.disable}>
<button disabled={isDisabled} type="button" fullwidth="true" variant="contained"
onClick={() => this.saveFreeQuote()} style={{padding: '9px 0px'}}>Submit</button>
</Form>
I want to do same for the value button.If i click the button it will save the value as a string and redirect to another page.How can i do it?
from your post I assumed that you want to save button value in state and also want to initiate the axios request while button click.
try to change like below
import React from 'react';
import PropTypes from 'prop-types';
import classNames from 'classnames';
import axios from 'axios';
class CustomizedButtons extends React.Component {
constructor(props) {
super(props);
this.state = {
apiUrl:config.publicRuntimeConfig.publicRuntimeConfigValue.apiUrl,
category: "",
};
}
saveValue = (e) => {
console.log('savecategory', e.target.innerHTML);
this.setState({
category: e.target.innerHTML
}, this.makeAxiosRequest);
};
makeAxiosRequest = () => {
axios.post( this.state.apiUrl+'/api/v1/leadsurvey/category', {
'categoryName':this.state.category,
}, {})
};
render() {
const { classes} = this.props;
return (
<div>
<div>
<p>What is the type of your property?</p>
<div>
<button onClick={this.saveValue}>Residence</button>
<button onClick={this.saveValue}>Commercial</button>
</div>
<div style={{marginTop: '90px'}}>
</div>
</div>
</div>
);
}
}
export default CustomizedButtons;
here am using callback function inside setState() to initiate axios request after button value saved in state.
Hope this helps.
I am following the current tutorial:
Youtube tutorial at 12:51 mins.
I expect to see bunch of posts on my screen but my screen remains blank.
It appears I have followed everything told in the tutorial.
import React, { Component } from 'react';
class Posts extends Component {
constructor(props) {
super(props);
this.state = {
posts: []
}
}
componentWillMount() {
fetch('https://jsonplaceholder.typicode.posts')
.then(res => res.json())
.then(data => this.setState({posts: data}))
}
render() {
const postItems = this.state.posts.map(post => (
<div key={post.id}>
<h3>{post.title}</h3>
<p>{post.body}</p>
</div>
));
return (
<div>
<h1>Posts</h1>
{ postItems }
</div>
);
}
}
export default Posts;
and
import React, { Component } from 'react';
import './App.css';
import Posts from './components/Posts'
class App extends Component {
render() {
return (
<div className="App">
<Posts />
</div>
);
}
}
export default App;
My browser screen remains blank and I do not see any errors on console.
What am I missing ?
Don't know about the tutorial but it looks outdated...
Here is your App.js (parent component):
import React, { Component } from 'react';
import Posts from './Posts';
export default class App extends Component {
state = { posts: [] };
//fetch the posts and store them in the state
componentDidMount() {
fetch('https://jsonplaceholder.typicode.com/posts')
.then(response => response.json())
.then(posts => this.setState({ posts }))
.catch(error => console.log(error));
}
render() {
return (
<div>
{/* pass the state (posts) as props to Posts */}
<Posts posts={this.state.posts} />
</div>
);
}
}
Here is your Posts.js:
import React from 'react';
// No need for a class based comp
// destructure the props and you have all your data
const Posts = ({ posts }) => (
<div>
{posts.map(post => (
<div key={post.id}>
<h3>{post.title}</h3>
<p>{post.body}</p>
<hr />
</div>
))}
</div>
);
export default Posts;
Live Demo: https://jsfiddle.net/ctszdue9/7/
Try putting side effect/ api call inside
componentDidMount() { }
Change URL
https://jsonplaceholder.typicode.posts/
TO
https://jsonplaceholder.typicode.com/posts
I'm attempting to consume a JSON API using fetch; the error mentioned above appears on the following line: **this.state.data.map( (dynamicData,key)=>**
This is my ReactJS code with the error line in bold:
import React, { Component } from 'react';
import './App.css';
class App extends Component {
//constructor
constructor() {
super();
this.state = {
data: [],
}
} //end constructor
componentDidMount(){
return fetch('https://jsonplaceholder.typicode.com/todos')
.then((response)=>response.json())
.then((responseJson)=>
{
this.setState({
data:responseJson.todos
})
console.log(this.state.data)
})
} // end component did mount
render() {
return (
<div>
<h2>Todo:</h2>
<div>
{
**this.state.data.map( (dynamicData,key)=>**
<div>
<span> {dynamicData.userId} </span>
<span> {dynamicData.id} </span>
</div>
)
}
</div>
</div>
);
}
}
export default App;
Could I get some help as to what I'm doing wrong? Thanks in advance
import React, { Component } from "react";
import { render } from "react-dom";
class App extends Component {
state = {
data:[],
url: "https://jsonplaceholder.typicode.com/todos"
};
componentDidMount() {
fetch(this.state.url)
.then(response => response.json())
.then(data => this.setState({ data }));
}
render() {
const { data } = this.state;
data && console.log(data);
return (
<div>
{data &&
data.map(item => <div> Hello User With Id: {item.userId} </div>)}
</div>
);
}
}
render(<App />, document.getElementById("root"));
Your didMount should look like mine also, setState takes a callback so if you wanted to see what the data looked like it would be like this
this.setState({ data }, () => console.log(this.state.data))
In your render it looks like you forgot the parenthesis after the arrow function in map.
render() {
return (
<div>
<h2>Todo:</h2>
<div>
{
this.state.data.map((dynamicData,key)=> (
<div>
<span> {dynamicData.userId} </span>
<span> {dynamicData.id} </span>
</div>
))
}
</div>
</div>
);
}