React News Wednesday, July 18

Integrate a Launch Timer in a Website Using JavaScript

  • Programming Language(s) – – For setting up, we would require the following: – – – JavaScript (for programming the core of the launch timer) – – HTML (front-end; for the general client end page) – – CSS (for styles) – We will discuss each one of them later in the…
  • css – – – /head – – body – – container class=container – – header – – /header – – section – – /section – – main class=main-body – table class=counter-style – – tr class=main – – td colspan=4 – Launch Timer – /td – /tr – – tr class=timer…
  • After running the index.html file into your favourite browser, the launch timer would look like this: – – – – Backend Logic (JavaScript) – – First, let me share the complete JavaScript code first before explaining it in details!
  • getTime(); – – let timerDifference = launchDate – currentDate; – – let seconds = let minutes = Math.floor(seconds/60); – let hours = Math.floor(minutes/60); – let days = Math.floor(hours/24); – – day.innerText = days; – hour.innerText = hours%24; – minute.innerText = minutes%60; – second.innerText = seconds%60; – – setTimeout(launchTimer, are the…
  • For the current time, the Date constructor with no parameters is used, whereas, in order to get the launch time, the Date constructor with four parameters is used, which are as follows (in sequence): year, month, day-of-the-month, and hour.

Tags:

Integrate a Launch Timer in a Website Using JavaScript

The Road to learn React [React.js Book for 2018] – RWieruch

Tags:

The Road to learn React [React.js Book for 2018] – RWieruch

Immutability / Don’t Mutate my State!

  • For example, if two parts of your code called at almost the same moment, React would process the first state change, re-render React, and then process the second state change.
  • Yep, this is a new array: we did not change state.
  • But, if the new state depends on the old state – like our new depends on the current – then you need to use as a callback.
  • Inside, create the array: , and return the new state: set to .
  • To keep it simple, just remember the rule: if setting new state involves you using data on , pass a callback instead.

Tags:

Immutability / Don’t Mutate my State!

  • In Redux, the state object is immutable and the only way to change state is by dispatching actions to a reducer.
  • These are functions used to describe how to bind Redux state and actions to a React component.
  • It’s a ‘dumb’ UI component that takes the count and a resetCount function… – – …and then we can connect it to Redux using the connect() method: – – Install react-redux and its typings with this command: – – If Redux is the missing piece of React, then selectors are…
  • Selectors, on the other hand, are for retrieving data from state… but in a way that decouples UI components from knowledge of the state structure.
  • And a stateless-functional component is a function that renders DOM elements without all the other complexity that is involved with React components (like state and lifecycle methods).

Tags:

Top 8 Recommended Libraries for a React + Typescript Project

Comments are a Code Smell – Programming Is Easy

  • Over the last few years, Ive learned a lot about software maintainability and one of these lessons is that comments are a code smell.
  • Instead of a programmer being wrong at the start, this is usually the result of an overworked (or sloppy) developer making a bug fix or extending code, and not updating the existing comments to reflect their changes.
  • isUrl(req.query.url)) { – res.writeHead(400, {‘content-type’: ‘application/json’}); – 400, message: Invalid RSS feed URL})); – res.end(); – return; – } – – This can be cleaned up a little bit: – – let urlIsValid = (!!
  • req.query.url isUrl(req.query.url)); – – if (urlIsValid === false) { – res.writeHead(400, {‘content-type’: ‘application/json’}); – 400, message: Invalid RSS feed URL})); – res.end(); – return; – } – – The second version is a bit more verbose, but also much easier to understand.
  • By the way, having a solid test suite has a benefit that a lot of people dont consider: It serves as documentation for developers, and further reduces the need for comments in your source code.

Tags:

Comments are a Code Smell – Programming Is Easy | A blog by Matt Chandler

How to write a Discord bot in Python

  • embed.add_field(name=Server count, value=f{len(bot.guilds)}) – – # give users a link to invite thsi bot to their server – embed.add_field(name=Invite, value=[Invite link](insert your OAuth invitation link here)) – – await ctx.send(embed=embed) – – – – The discord.py generates an help command automatically.
  • List of commands are:, color=0xeee657) – – embed.add_field(name=$add X Y, value=Gives the addition of **X** and **Y**, inline=False) – X Y, value=Gives the multiplication of **X** and **Y**, inline=False) – embed.add_field(name=$greet, value=Gives a nice greet message, inline=False) – embed.add_field(name=$cat, value=Gives a cute cat gif to lighten up the mood.
  • , inline=False) – embed.add_field(name=$info, value=Gives a little info about the bot, inline=False) – embed.add_field(name=$help, value=Gives this message, inline=False) – – await ctx.send(embed=embed) – – – – CONGRATULATIONS!
  • embed.add_field(name=Server count, value=f{len(bot.guilds)}) – – # give users a link to invite thsi bot to their server – embed.add_field(name=Invite, value=[Invite link](insert your OAuth invitation link here)) – – await def help(ctx): – embed = discord.Embed(title=nice bot, description=A Very Nice bot.
  • List of commands are:, color=0xeee657) – – embed.add_field(name=$add X Y, value=Gives the addition of **X** and **Y**, inline=False) – X Y, value=Gives the multiplication of **X** and **Y**, inline=False) – embed.add_field(name=$greet, value=Gives a nice greet message, inline=False) – embed.add_field(name=$cat, value=Gives a cute cat gif to lighten up the mood.

Tags:

How to write a Discord bot in Python

When to break up a component into multiple components

Tags:

When to break up a component into multiple components

Build software better, together

Tags:

Build software better, together

Socket.IO

Tags:

Socket.IO

Top React Courses

Modern React with Redux (86,762 students enrolled)

By Stephen Grider

  • Build amazing single page applications with React JS and Redux
  • Master fundamental concepts behind structuring Redux applications
  • Realize the power of building composable components
  • Be the engineer who explains how Redux works to everyone else, because you know the fundamentals so well
  • Become fluent in the toolchain supporting React, including NPM, Webpack, Babel, and ES6/ES2015 Javascript syntax

Learn more.

The Complete React Native and Redux Course (53,888 students enrolled)

By Stephen Grider

  • Create real-world native apps using React Native
  • Make truly reusable components that look great
  • Understand the terminology and concepts of Redux
  • Prototype and deploy your own applications to the Apple and Google Play Stores
  • Get up to speed with React design principles and methodologies
  • Discover mobile design patterns used by experienced engineers

Learn more.

Advanced React and Redux (35,016 students enrolled)

By Stephen Grider

  • Build a scaleable API with authentication using Express, Mongo, and Passport
  • Learn the differences between cookie-based and token-based authentication
  • Figure out what a Higher Order Component and how to use it to write dramatically less code
  • Write Redux middleware from scratch to uncover what is happening behind the scenes with Redux
  • Set up your own testing environment with Mocha and Chai
  • Realize the power of building composable components

Learn more.

React Redux React-Router: From Beginner to Paid Professional (11,715 students enrolled)

By Leonardo Daniel

  • Building your amazing web applications with React JS and Redux
  • Getting a high-paying job as a front-end developer
  • Getting experience through doing many exercises. Re-enforcing your knowledge of ES6, advanced JavaScript, Redux, React through attempting a lot of quizzes. Practice makes perfect.
  • Becoming familiar with the technologies supporting React, including NPM, Webpack, Babel, and ES6/ES2015.

Learn more.

React Native: Advanced Concepts (16,058 students enrolled)

By Stephen Grider

  • Make compelling applications using expert-level features of React Native
  • Create amazingly smooth and performant animations
  • Build new React Native apps with Expo
  • Understand the latest Navigation options for new React Native apps
  • Add logic to your Firebase backend with Google Cloud Functions
  • Update your users with cross platform Push Notifications
  • Handle your users going offline with Redux Persist

Learn more.

React JS and Redux – Mastering Web Apps (54,299 students enrolled)

By David Katz

  • Develop entire React JS and Redux applications from scratch.
  • Build applications that deal with APIs and web requests.
  • Discuss ES6 and advanced JavaScript.
  • Create web apps with full authentication, and real-time database.

Learn more.

React basic in just 1 hour (22,331 students enrolled)

By Leo Trieu

  • Taste of how to build your very first React component.
  • How to handle event in components.
  • Understand two key concepts of React: State and Props.
  • How to reuse and nest components.
  • How to transfer data between Parent, Child components.
  • How to work with Array, Form

Learn more.

Meteor and React for Realtime Apps (7,889 students enrolled)

By Stephen Grider

  • Create interactive web apps amazingly fast
  • Build amazing single page applications with Meteor and React JS
  • Master fundamental concepts behind structuring Meteor applications
  • Learn the true purpose of Meteor in a modern application
  • Be the engineer who explains how Meteor works to everyone else, because you know the fundamentals so well
  • Build and prototype interesting personal projects in a weekend

Learn more.

GraphQL with React: The Complete Developers Guide (14,683 students enrolled)

By Stephen Grider

  • Build amazing single page applications with React JS and GraphQL
  • Master fundamental concepts behind structuring GraphQL servers
  • Realize the power of building flexible data schemas
  • Be the engineer who explains how GraphQL works to everyone else, because you know the fundamentals so well
  • Become fluent in the ecosystem supporting GraphQL, including the differences between Apollo and Relay

Learn more.

Essentials in JavaScript ES6 – A Fun and Clear Introduction (40,155 students enrolled)

By David Katz

  • Create ES6 applications from the ground up.
  • Use the terminal/command-line application and a code editor to code.
  • Look at ES6 code and understand keyword and concepts.
  • Create live development servers with Webpack.

Learn more.

The Full JavaScript & ES6 Tutorial – (including ES7 & React) (55,808 students enrolled)

By David Katz

  • Code in JavaScript like a pro.
  • Code in es6 comfortably, using all the new features.
  • Build es6 projects from the ground up using tools like webpack and babel.
  • Create a basic ReactJS application from scratch.

Learn more.





Source link https://jsnews.io/react/developer-node-nodejs-coding-much-more-23/

LEAVE A REPLY

Please enter your comment!
Please enter your name here