Microservices with Docker, Flask, and React

  • To connect the client to the server, add a method to the class: – – We’ll use Axios to manage the AJAX call: – – You should now have: – – To connect this to Flask, open a new terminal window, navigate to the flask-microservices-users, activate the virtual environment, and…
  • Kill the Create React App server, and then run: – – We still need to call the method, which we can do in the : – – Run the server – via – and then within Chrome DevTools, open the JavaScript Console.
  • What would happen if the AJAX request took longer than expected and the component was mounted before it was complete?
  • Finally, update the method to display the data returned from the AJAX call to the end user: – – Let’s create a new component for the users list.
  • Add a new file to that folder called UsersList.jsx: – – Why did we use a functional component here rather than a class-based component?

If you’re new to React, review the Quick Start and the excellent Why did we build React? blog post. You may also want to step through the Intro to React tutorial to learn more about Babel and Webpack.
Continue reading “Microservices with Docker, Flask, and React”

Easily display PDF files in your #ReactJS application: by @wojtekmaj91 #JavaScript

Easily display PDF files in your #ReactJS application:  by @wojtekmaj91 #JavaScript

  • We strongly recommend to use Node >= 6 and npm >= 5 for faster installation speed and better disk usage.
  • Your project needs to use React 15.5 or later.
  • If you use older version of React, please refer to the table below to find suitable React-PDF version.
  • Add React-PDF to your project by executing .
  • This project wouldn’t be possible without awesome work of Niklas Närhinen niklas@narhinen.net who created its initial version and without Mozilla, author of pdf.js.

react-pdf – Easily display PDF files in your React application.
Continue reading “Easily display PDF files in your #ReactJS application: by @wojtekmaj91 #JavaScript”

Leveraging code-splitting in React Apps

  • Code-splitting allows you to split your code into separate bundles which you can load them on demand.
  • Code-splitting actually it allows you to split your code into separate bundles which you can load them on demand.
  • In Asynchronous way, you could do that by import, then calling a function, passing the path to your module, and then it returns a promise, and with the promise, you could actually do whatever you want to do.
  • Create a state that has the AsyncComponent, which is default, which is not a default, and in the componentDidMount, lifecycle method, you could call your component, because you’re passing a function, and then resolve the import actually, to get the module, and set the state to the AsyncComponent, and this basically loads, or this gives you the possibility to load, or to render the module as it’s there.
  • So there’s some useful patterns about code-splitting, which is when you start to improve your performance or pitch speed, you should definitely consider vendors, like longterm caching, it’s like split your bundle, or, put your common modules together into one, and like it renders, and your other modules into your separate views.

Code-splitting allows you to split your code into separate bundles which you can load them on demand. How do you do it? Why is it useful? How would you do it in React? Answers to these questions and more in the talk.
Continue reading “Leveraging code-splitting in React Apps”

intro-to-react/README.md at master · ericvicenti/intro-to-react · GitHub

  • We can modify our component to display the data being passed in:

    Near the top of the file, lets add some different places that we might want to display weather for:

    Now, upgrade the App’s render function to iterate over each place, and render a tag for it.

  • We want our app to be able to switch between places, so we can use state to keep that data in our App component.
  • Let’s use the and in our App component:

    At this point, your file should look like this.

  • Let’s install it, alongside which provides the React components for it:

    In the top of the app file, import the css from the bootstrap module:

    Next, import the components we want to use from .

  • Now, replace the App component’s render function to use the bootstrap components:

    Now our app is starting to look more polished, but it would be nice to have a custom theme.

intro-to-react – A Hands-On Walkthrough of your first React Web App
Continue reading “intro-to-react/README.md at master · ericvicenti/intro-to-react · GitHub”

ReactJS App With Laravel RESTful API Endpoint Part 2

ReactJS App With Laravel RESTful API Endpoint Part 2  #redux

  • /reducers”;const logger = createLogger();export default createStore(reducer, composeWithDevTools( applyMiddleware(thunk, promise, logger),));This file is the store that holds the application state and provides a few helper methods to access the state, dispatch actions and register listeners.
  • /UsersReducer”export default combineReducers({ users})UsersReducer.jsexport default function reducer(state={ users: [], user: null, fetched: false, error: null}, action){switch (action.type){case “FETCH_USERS_REJECTED”: { return { …state, fetched: false, error: action.payload } }case “FETCH_USERS_FULFILLED”: { return { …state, fetched: true, users: action.payload.data.users, } }case “FETCH_USER_REJECTED”: { return { …state, fetched: false, error: action.payload } }case “FETCH_USER_FULFILLED”: { return { …state, fetched: true, user: action.payload } }}return state;}Next we update the app.js file in the public/js/ folderapp.js import React from “react”;import ReactDOM from “react-dom”;import { Router, Route, IndexRoute, hashHistory } from “react-router”;import { Provider } from “react-redux”;import Layout from “.
  • /store”;const app = Provider store={store} Router history = { hashHistory } Route path = “/” component = { Layout } IndexRoute component = { Home }/IndexRoute Route path = “users” component = { Users }/Route Route path = “users/new” component = { NewUser }/Route Route path = “users/:id/edit” component = { EditUser }/Route Route path = “articles” component = { Articles }/Route /Route /Router /Provider, app);Wrapping the router with a react-redux Provider component which would allow our React components to automatically share data and efficiently update whenever some action is triggered.Step 1Update the Users.js inside the public/js/components folderUsers.jsimport React from ‘react’;import { connect } from “react-redux”;import { Link } from “react-router”import { fetchUsers, deleteUser } from Users extends React.Component{constructor(){ super(); this.handleBtnDelete = event){ event.preventDefault();var r = confirm(“Are you sure you want to delete this document!”)
  • ; if (r == true) { const url = var formElement = var formData = new FormData(formElement); } }render(){return( div h1 className=”pull-left”Users/h1 div className=”col-lg-12″Link to=”users/new” className=”btn btn-primary btn-sm pull-left”Create New nbsp; i className=”glyphicon glyphicon-plus”/i/Linktable className=”table table-responsive”thead tr thName/th thEmail/th thPhone Number/th thContact Address/th th/th /tr /thead tbody { this.props.users.map((user, index) = { return ( tr key={index+1} td{user.fullname}/td td{user.email}/td td{user.phone_number}/td td{user.contact_address}/td tdLink className=”btn btn-success btn-xs pull-left”i className=”glyphicon glyphicon-pencil”/i/Linkform id={“form_”+user.user_id} className=”pull-left” method=”post” input type=”hidden” name=”user_id” value={user.user_id} / a className=”btn btn-danger btn-xs” onClick={(event) = event)} href=”#” id={user.user_id}i className=”glyphicon glyphicon-trash”/i/a /form /td /tr ) }) } /tbody/table/div /div ); } }function mapStateToProps(state) { return { users: state.users.users, } } export default the code above, the Users component is connected to the redux store which has access to dispatch two actions which are fetchUsers, deleteUser in the userActions.js file.
  • This is the component for creating a new user.NewUser.jsimport React from ‘react’;import { push } from “react-router”;import axios from “axios”;import { NotificationManager } from ‘react-notifications’;class NewUser extends React.Component{static contextTypes = { router: };constructor(){ super();this.state = { errors: ” }; this.handleSubmit = this.handleSubmit.bind(this); }handleSubmit(event) { event.preventDefault();var formElement = var formData = new FormData(formElement); formData) .

This article is the concluding part of the series on React App With Laravel RESTful API Endpoint. Sorry for the delay of this much awaited post. In the previous article, I set up the react app with…
Continue reading “ReactJS App With Laravel RESTful API Endpoint Part 2”