We Keep Coding

How to assign props values to inline styles

I'm using create react app and I need to assign props values to a styles of the component. In this case background image 'url' is need to pass as props to styles.
I have tried a lot of solutions but none of them worked
I'm making a component named HeroSection with props including backgroundURL and videoURL, I'm then using a statement to assign backgroundImage if the prop videoURL is empty
Home.js
import React from "react";
import HeroSection from "./components/HeroSection";
function Home() {
return (
<div className="home">
<HeroSection
firstLine="Not just a team,"
secondLine="We are a "
autoType={[
"family of rebels",
"movement of ideas",
"collection of culture",
]}
backgroundURL="../assets/hero_pic.jpg"
videoURL=""
/>
</div>
);
}
export default Home;
HeroSection.jsx
import React from "react";
import Typed from "react-typed";
function HeroSection(props) {
return (
<div
className={
props.videoURL === "" ? "hero-section img-background" : "hero-section"
}
style={{
backgroundImage:
props.videoURL === "" ? `url(${this.props.backgroundURL})` : "none",
}}
>
<h2>
<span className="first-line">{props.firstLine}</span>
<br />
<span className="second-line">{props.secondLine}</span>
<Typed
strings={props.autoType}
typeSpeed={40}
loop={true}
backDelay={2000}
backSpeed={20}
/>
</h2>
</div>
);
}
export default HeroSection;
I HAVE ALSO TRIED THESE STATMENTS AND NONE OF THEM WORKED
props.videoURL === "" ? `url(${props.backgroundURL})` : "none",
props.videoURL === "" ? `url('file://${props.backgroundURL}')` : "none",

So the solution was very simple
It's due to how webpack handle your assets. Since I pass it just as a string, it can't know that it needs to bundle your png as an asset. In HeroSection I added import backgroundPic from '../assets/hero_pic.jpg' and then used it in the props backgroundURL={backgroundPic} of HeroSection
Thanks for #user3252327 for commenting the solution

Getting a Render not Function Error, when I run this Code Context API and Reactjs

Thanks for taking the time to read this. I have been at this now for a few hours and nearly got it right except now, Im Getting a "TypeError: render is not a function" Error and Can not figure it out, using Context API and Reactjs Please help
I have changed around States and props and back again this is the closest I got it to work
this is my parent file where I pass the UserProvider
import React, { Component } from "react";
import Group from "./Groups";
import JsonData from "../data/export";
import { UserProvider } from "./context/UserContext";
class GroupGrid extends Component {
render() {
// console.log(JsonData);
return (
<UserProvider value={JsonData}>
<div className='cards'>
<Group />
</div>
</UserProvider>
);
}
}
export default GroupGrid;
this is the child file
import React, { Component } from "react";
import UserContext from "../components/context/UserContext";
import { UserConsumer } from "../components/context/UserContext";
class GroupDetails extends Component {
static contextType = UserContext;
componentDidMount() {
const data = this.context;
// console.log(data); // { name: 'Tania', loggedIn: true }
}
render() {
return (
<UserConsumer>
{this.context.TransportGrid.GROUPS.map((value, index) => (
<div key={value.GROUP_ID} className='GroupDetail'>
<div className='groupRow1'>
<span className='Date_label'>Date:</span>
<span className='GroupDate'>
{value.GROUP_DATE}
</span>
<span className='Group_label'>Group No:</span>
<span className='GroupID'>{value.GROUP_ID}</span>
</div>
<div className='groupRow2'>
<span className='Driver_label'>Driver:</span>
<span className='DriverName'>
{value.DRIVER_NAME}
</span>
<span className='Reg_label'>Artic:</span>
<span className='VehcileReg'>
{value.VEHICLE_REG}
</span>
</div>
</div>
))}
</UserConsumer>
);
}
}
export default GroupDetails;
and this an example of the JSON it looking at
{
"TransportGrid": {
"GROUPS": [
{
"GROUP_ID": "1234",
"GROUP_DATE": "20/08/2019",
"DRIVER_ID": "22",
"DRIVER_NAME": "JIMMY BLOGGS",
"VEHICLE_REG": "XSRFDFDDF",
"START_COUNTRY": "COUNTRY1",
"END_COUNTRY": "COUNRTY2",
"MOVEMENTS": [
{
this is repeated like 180 times ANyone got any idea's?
Thanks in Advance

Problem is that your consumer from context API needs to just have a single children element as a function whereas you are having an array of JSX elements as children.
Also since you are using the latest context API you don't need to use the Consumer component, you could simply write your code as
class GroupDetails extends Component {
static contextType = UserContext;
componentDidMount() {
const data = this.context;
// console.log(data); // { name: 'Tania', loggedIn: true }
}
render() {
return (
<React.Fragment>
{this.context.TransportGrid.GROUPS.map((value, index) => (
<div key={value.GROUP_ID} className='GroupDetail'>
<div className='groupRow1'>
<span className='Date_label'>Date:</span>
<span className='GroupDate'>
{value.GROUP_DATE}
</span>
<span className='Group_label'>Group No:</span>
<span className='GroupID'>{value.GROUP_ID}</span>
</div>
<div className='groupRow2'>
<span className='Driver_label'>Driver:</span>
<span className='DriverName'>
{value.DRIVER_NAME}
</span>
<span className='Reg_label'>Artic:</span>
<span className='VehcileReg'>
{value.VEHICLE_REG}
</span>
</div>
</div>
))}
</React.Fragment>
);
}
}
export default GroupDetails;

Fallback message for empty object meteor/react

I would like to show a message if there aren't objects to be returned. Something like: 'currently there are no customers available'.
I tried to tinker a bit with Object.getOwnPropertyNames() but could not get it working because the mapping function does not being called. I'm not sure where to put this check, inside the rendering function, in the with tracker or render call inside the template.
I use Meteor/react and my code looks like this:
import React, {Component} from 'react';
import {withTracker} from 'meteor/react-meteor-data';
import {Link} from 'react-router-dom';
class ArchiveCustomerOverview extends Component {
renderCustomerList() {
return this.props.users.map( user => {
return(
<div className="row" key={user._id}>
<Link to={}>
<span className="medium-1">{user.profile.name}</span>
<span className="medium-4">{user.profile.company}</span>
<span className="medium-3">{user.profile.phone}</span>
<span className="medium-3">{user.emails[0].address}</span>
</Link>
</div>
)
});
}
render() {
return (
<div>
<div className="list-overview">
<div className="list-wrapper">
<div className="list-box clear">
{this.renderCustomerList()}
</div>
</div>
</div>
</div>
);
}
}
export default withTracker( (props) => {
Meteor.subscribe('users');
return {
users: Meteor.users.find({
'profile.isArchived': 0,
'roles.customers' : 'customer'
}).fetch()
};
})(ArchiveCustomerOverview);

Just check on the number of users before you render them like this:
renderCustomerList() {
if (this.props.users.length === 0) {
return (<div>Currently there are no customers available</div>)
}
return this.props.users.map( user => {
But a word of warning: you may not get what you want from the users collection - for security reasons it is treated differently from other collections.

Proper way to build bootstrap modals and notifications in React JS?

I would like to have modals and notifications in my app and coming from using old jQuery Bootstrap, creating modals and notifications were really easy but now I am pretty confused on how to implement this in the virtual DOM using the react component system.
This is what I believe the standard react way to build modals in React within a component:
Index/Router Component >
Main Layout Component >
{...Page Components... }
{...Child Component}
{<Modal /> or <Notification />}
The issue with this is I dont want to constantly have to import and create a <Modal> or <Notification /> component within my sub components, instead maybe just call a utility function such as {app.notify({type: 'success', message: 'some message'})} or app.modal({...customconfig}) and have both defined within my Main layout component which get triggerd through any child components.
Any help on this would be great, thanks!

You do not need to keep your Modal component in a hierarchy. Your Modal component should be an independent component which would take appropriate props to decide what needs to be displayed. E.g.
<Modal message={"This is my modal"} showOkCancel={true} showYesNo={false} handleOkYes={()=>console.log("OK clicked")} handleCancelNo={()=>console.log("Cancel clicked"} />
In the above example, the Modal accepts a number of props which would help it decide the message to display, the buttons to display and the actions that need to take on said button click.
This kind of a component can reside outside your component hierarchy and can be imported into any component that needs to show a modal. The parent component would just need to pass the appropriate props to show the modal.
Hope this helps.

So here is the approach I took to resolve this.
First here is how you want to structure the modal and notification components:
{Index/Router Component}
{Main Layout Component <Modal /> or <Notification />}
{...Page Components... }
{...Child Component calls app.modal({...config}) or app.notify(...config)}
For notifications, I used a plugin called react-notification-system and for modal, I just wrote it myself.
Here is my code:
Layout.js
import React from "react";
import {Link} from 'react-router';
import NotificationSystem from 'react-notification-system';
import AppHeader from "#/ui/header/AppHeader";
import AppFooter from "#/ui/footer/AppFooter";
import Modal from "#/ui/modals/modal/Modal";
import "#/main.scss";
import './layout.scss';
export default class Layout extends React.Component {
constructor(props) {
super(props);
}
componentDidMount() {
app.notify.clear = this.refs.notificationSystem.clearNotifications;
app.notify = this.refs.notificationSystem.addNotification;
app.modal = this.refs.modal.updateProps;
}
render() {
return (
<div class="app">
<div class="header">
<AppHeader page={this.props.location.pathname.replace('/', '')}/>
</div>
<div class="body">
{this.props.children}
</div>
<div class="footer">
<AppFooter />
</div>
<NotificationSystem ref="notificationSystem" style={false} />
<Modal ref="modal" />
</div>
);
};
}
Modal.js
import React from "react";
import ReactDOM from 'react-dom';
import SVGInline from "react-svg-inline";
import {closeSvg} from '#/utils/Svg';
export default class Modal extends React.Component {
constructor(props) {
super(props);
this.state = {
showHeader: true,
showFooter: false,
title: "",
size: '',
className: '',
id: '',
footerContent: null,
showSubmitBtn: true,
showCancelBtn: true,
cancelBtnText: "Cancel",
successBtnText: "Save Changes",
onModalClose: () => {},
showModal: false,
html: () => {}
}
this.updateProps = this.updateProps.bind(this);
this.hideModal = this.hideModal.bind(this);
}
componentWillMount() {
var self = this;
var $modal = $(ReactDOM.findDOMNode(this));
}
componentDidUpdate(prevProps, prevState) {
if(this.state.showModal) {
$('body').addClass('modal-open');
} else {
$('body').removeClass('modal-open');
}
}
componentWillUnmount() {
// $('body').removeClass("modal-open");
}
componentWillReceiveProps(nextProps) {
console.log(nextProps);
}
updateProps(args) {
let merged = {...this.state, ...args};
this.setState(merged);
}
hideModal() {
this.setState({
showModal: false
});
this.state.onModalClose();
}
buildFooter() {
if(this.props.footerContent) {
return (
<div class="content">
{this.props.footerContent}
</div>
)
} else if(this.props.showCancelBtn && this.props.showSubmitBtn) {
return (
<div class="buttons">
<button type="button" class="btn btn-default" data-dismiss="modal" onClick={this.props.onModalClose}>{this.props.cancelBtnText}</button>
<button type="button" class="btn btn-success">{this.props.successBtnText}</button>
</div>
);
} else if(this.props.showCancelBtn) {
return (<button type="button" class="btn btn-default" data-dismiss="modal" onClick={this.props.onModalClose}>Close</button>);
} else if(this.props.showSubmitBtn) {
return (<button type="button" class="btn btn-success">Save changes</button>);
}
}
render() {
let {
id,
className,
onModalClose,
size,
showHeader,
title,
children,
showFooter,
showModal,
html
} = this.state;
return (
<div class={`modal-wrapper`} >
{
showModal ?
<div class={`modal fade in ${className}`} role="dialog">
<div class="bg" ></div>
<div class={`modal-dialog ${size}`}>
<div class="modal-content">
{ showHeader ?
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">
<SVGInline svg={closeSvg} />
</button>
<h4 class="modal-title">{ title }</h4>
</div> : '' }
<div class="modal-body" >
{html()}
</div>
{ showFooter ?
<div class="modal-footer">
{ this.buildFooter() }
</div> : ''
}
</div>
</div>
</div>
: ''
}
</div>
);
}
}
then in any of your child components you can just call within your render function:
app.notify({
message: message,
level: 'error'
});
or
app.modal({
showModal: true,
className: "fullscreen-image-modal",
size: "modal-lg",
html: () => {
return (<img src={listingManager.LISTINGS_PATH + imgUrl} />);
}
})

Apanding external HTML to a react component is not working

Basically I want to add an static HTML to a react component from external script.
So I'm saving the reference of this to window variable as follows:
let { PropTypes } = React;
export default class Body extends React.Component {
constructor(){
super();
let frmTrgt={};
frmTrgt.refff=this;
console.log("tthis: ",this);
window.bdyRefrence=frmTrgt;
}
static defaultProps = {
items: []
};
static propTypes = {
items: PropTypes.array.isRequired
};
render() {
return (
<div className={styles.body}>
<h1 className={styles.header}>React Seed</h1>
<p>This is an example seed app, powered by React, ES6 & webpack.</p>
<p>Here is some example data:</p>
<Menu items={this.props.items} />
<div>
<h1>Dynamic Content</h1>
<div id="myDynamicContent"></div>
</div>
</div>
);
}
}
and in my script tag in INDEX.html( Outside Script) I'm doing like following:
function addPHtml() {
try {
window.bdyRefrence.refff.refs.formTarget.insertAdjacentHTML("<p id='mhere'>paragraph 2</p>");
}catch (err){
console.log("err: ",err);
}
}
but when I'm calling addPHtml it is giving following error:
err: TypeError: Cannot read property 'insertAdjacentHTML' of undefined
at addPHtml ((index):19)
at <anonymous>:1:1

What your trying to do is not the correct way to insert the element in React, still for you requirement please refer below mentioned code
Your render function should be like
return(
<div>
<div ref="formTarget"></div>
<h1 >React Seed</h1>
<p>This is an example seed app, powered by React, ES6 & webpack.</p>
<p>Here is some example data:</p>
<div>
<h1>Dynamic Content</h1>
<div id="myDynamicContent"></div>
</div>
</div>
)
Please check Demo here Demo
In case using new React syntax (Createclass is deprecated now) use
window.refferedItem.refs.formTarget.getDOMNode().insertAdjacentHTML