Set Up A React Project With Parcel: The Zero Configuration App Bundler ― Scotch

Set Up A React Project With Parcel: The Zero Configuration App Bundler

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#Reactjs

  • One other thing to note about Parcel is that it allows developers to use an index.html file as an entry point as opposed to JS modules.
  • One of the many cool things about Parcel is that, it comes with a development server built in which will automatically rebuild your app as you change files and supports hot module replacement for fast development.
  • “scripts”: { – “start”: “parcel index.html” – }, – This means that, whenever we run the npm start command, we are telling Parcel to start a development server using the index.html file as a entry file.
  • Building for Production – To prepare your app for production with Parcel, all you need to do is run the command parcel build …. Let’s add that to the scripts object in the package.json file.
  • Change output directory – If you’d prefer another directory for Parcel to put the production files in (dist is the default directory), you can specify that by appending –out-dir directory-name at the end of the build key in package.json so it looks like this: – – “scripts”: { – “start”:…

Continue reading “Set Up A React Project With Parcel: The Zero Configuration App Bundler ― Scotch”

Set Up A React Project With Parcel: The Zero Configuration App Bundler ― Scotch

  • One other thing to note about Parcel is that it allows developers to use an index.html file as an entry point as opposed to JS modules.
  • One of the many cool things about Parcel is that, it comes with a development server built in which will automatically rebuild your app as you change files and supports hot module replacement for fast development.
  • “scripts”: { – “start”: “parcel index.html” – }, – This means that, whenever we run the npm start command, we are telling Parcel to start a development server using the index.html file as a entry file.
  • Building for Production – To prepare your app for production with Parcel, all you need to do is run the command parcel build …. Let’s add that to the scripts object in the package.json file.
  • Change output directory – If you’d prefer another directory for Parcel to put the production files in (dist is the default directory), you can specify that by appending –out-dir directory-name at the end of the build key in package.json so it looks like this: – “scripts”: { – “start”: “parcel…

When it comes to web application bundling, there’s a new kid on the block and that’s Parcel. ParcelJS is a relatively new bundler that was launched sometime around October, last year. Parcel describes itself as a blazing fast, zero-configuration web application bundler.
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3 Best React JS Courses – codeburst

  • Top 3 React JS CoursesInstructor: Stephen Grider || 26.5 Hours of Video || 52,109 StudentsStephen Grider’s Modern React with ReduxStephen Grider is the King of React.
  • He has created 11 courses teaching React and has over 86,000 enrolled students!
  • He knows not only how to create great content — but also how to be a great instructor.This course is his introductory React JS course.
  • He starts from the ground up, and introduces and explains every topic along the way.Not only will you walk about with a great foundation and understanding of React, but you’ll also understand the basics of Redux — which is really, really important for scaling applications (aka getting a job with a React).
  • That means you won’t just be coding along with a video — you’ll be learning while creating real world, production ready web applications!Click here to learn more or to sign up!PS: Stephen also offers an Advanced React course which you can take after this one, or if you already have some beginner React experience!

React is currently in the top ten for developer salaries and it’s the #1 fastest growing JavaScript Framework. It’s easy to get started with, and there are a ton of jobs and opportunities React can…
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TDD? Waste of time! – Reactive Conf

Doing TDD today is a waste of time in 99% of cases:  #ReactJS #JavaScript

  • Trying out your code with various inputs is the testing every single one of us is familiar with.Writing automatic tests is a waste of time in 99% of cases.Yes, automatic tests have following benefits in comparison with “testing by hand”:You write the test once and can run it million times.
  • If your code changes due to code review or refactoring, you can just re-run it.It can serve as a record for code review that you thought of all the corner cases.When making a new feature, they serve as proof you didn’t break the rest of the system.Tests come at a significant cost as TDD programmers spend as much as half of their time writing tests.That may be acceptable if we run the test a hundred times.
  • TDD encourages, however, writing mostly unit tests.Testing pyramidWhen we refactor the unit, we usually intentionally change its contract and tests fail as expected, which is useless.Failed tests are useful only if they fail unexpectedly.If we take the real cost of automatic testing into account, the well-known ice cream cone anti-pattern doesn’t look like an anti-pattern anymore.Ice cream cone anti-patternMost bugs are caused by wrong interaction between units rather than faulty units.
  • You can’t commit a manual test to a repo, you can’t easily verify it on a code review.Could we make writing tests as simple as testing manually?Cool things are happening in the testing field right now.
  • I hope he’s got some ideas how to finally make automatic tests cheap to write and maintain!Rogelio GuzmanIf you are as excited about Jest Snapshots as we are, snap up your ticket today!

Test-driven development is extremely costly. Yet, it is the religion of our profession, encouraged even when the benefit-cost ratio is low. Should we stop doing it? Can we make testing cheaper…
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TDD? Waste of time! – ReactiveConf – Medium

TDD? Waste of time!  #javascript #react #testing #reactjs

  • Trying out your code with various inputs is the testing every single one of us is familiar with.Writing automatic tests is a waste of time in 99% of cases.Yes, automatic tests have following benefits in comparison with “testing by hand”:You write the test once and can run it million times.
  • If your code changes due to code review or refactoring, you can just re-run it.It can serve as a record for code review that you thought of all the corner cases.When making a new feature, they serve as proof you didn’t break the rest of the system.Tests come at a significant cost as TDD programmers spend as much as half of their time writing tests.That may be acceptable if we run the test a hundred times.
  • TDD encourages, however, writing mostly unit tests.Testing pyramidWhen we refactor the unit, we usually intentionally change its contract and tests fail as expected, which is useless.Failed tests are useful only if they fail unexpectedly.If we take the real cost of automatic testing into account, the well-known ice cream cone anti-pattern doesn’t look like an anti-pattern anymore.Ice cream cone anti-patternMost bugs are caused by wrong interaction between units rather than faulty units.
  • You can’t commit a manual test to a repo, you can’t easily verify it on a code review.Could we make writing tests as simple as testing manually?Cool things are happening in the testing field right now.
  • I hope he’s got some ideas how to finally make automatic tests cheap to write and maintain!Rogelio GuzmanIf you are as excited about Jest Snapshots as we are, snap up your ticket today!

Test-driven development is extremely costly. Yet, it is the religion of our profession, encouraged even when the benefit-cost ratio is low. Should we stop doing it? Can we make testing cheaper…
Continue reading “TDD? Waste of time! – ReactiveConf – Medium”

No more hassle with React Native

No more hassle with @reactnative -  @ir_ignite @infinite_red #reactNative #ignite #devLife

  • If you have any experience with React Native, you’ll already know about some great React Native libraries.
  • You might have even heard about this awesome React Native repository where we can find wonderful libraries.
  • They have created Ignite, a framework (or kit) of libraries using best practices for React Native.
  • There are a lot of really cool things to learn, and I highly recommend you create a new Ignite app and check out the generated code.
  • I’ve previously talked about Ignite in this drip, the libraries they use and how to start a new app.

No more hassle with React Native
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How to Port Your Native Modules into a React Native Environment

Port your native modules into a React Native environment:  #ReactJS #JavaScript

  • Additionally, this middleware object–written in Objective-C–can interface with other Objective-C code, thereby letting us wrap around our existing native SDK calls, like initNewUserSession.
  • In the example below, notice how these functions in the middleware mirror exactly what our native SDK provides:

    Now that we have a nice middleware object, we need the Objective-C environment to be aware of it.

  • What’s very nice about this design pattern is that by having the wrapper simply wrap around the SDK, we’re letting the native SDK do the heavy lifting of lifecycle management, but allowing ourselves the flexibility to design the interface back to Javascript:

    Once we know we can hook into the iOS lifecycle methods and have the middleware “listen” to these lifecycle events, we can write the Javascript portion of the SDK to receive notifications when an event occurs.

  • For developers using React Native with Branch, it’s a matter of tapping into the Javascript function that connects to the RNBranch methods, and doing all the cool things they do with Branch, like receive deep link data, save custom events, and create shareable links, without having to worry about messy or complicated hooking into native code.
  • Branch found a relatively straightforward way to port into React Native without spending a bunch of time re-writing the Native SDK into a Javascript environment.

Learn more about how to port your native modules into a React Native environment, with this comprehensive guide from Branch.
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