Benefits of MEAN Stack for application development🌟🌟🌟🌟🌟

Benefits of MEAN Stack for application development🌟🌟🌟🌟🌟

MEAN is a full stack JavaScript framework that enables rapid development of web applications. MEAN is an acronym for MongoDB, Express, Angular JS, and Node.js, on which they all run....

MEAN is a full stack JavaScript framework that enables rapid development of web applications. MEAN is an acronym for MongoDB, Express, Angular JS, and Node.js, on which they all run....

Using MEAN, you can use JavaScript to generate the entire code from the client to the server. All the MEAN components are open source which means that they get updated on a regular basis and there is a large resource pool available for reference. Considering this, it is no wonder that MEAN has found wide acceptance in the JS community and remains the framework of choice for app development.

Let’s take a quick look at the underlying technologies of the MEAN Stack.

MongoDB

MongoDB is classified as a NoSQL database and is a document-oriented, cross-platform database. It uses JSON-like documents with dynamic schemes instead of a more traditional table-based relational database.

ExpressJS

Express is a flexible and minimal node.js web application framework that provides a set of stable features to develop single, multipage, or hybrid websites.

AngularJS

AngularJS is maintained by Google and is an open source JavaScript framework that is ideal for single page applications. It augments browser-based applications with an MVC capability to make development and testing more efficient.

Node JS

The Node.js platform built on Chrome’s JavaScript runtime. It enables the development of fast and scalable network applications. It is efficient and lightweight as it uses a non-blocking I/O model and is event driven. It is ideal for running real-time, data-intensive applications across distributed networks and devices.

To learn more, you could sign up for Mean Stack Web Development training. There are several Mean Stack Web Development courses available online and offline.

Here are some benefits of MEAN Stack for developing mobile apps and websites.

MEAN Makes It Easy to Switch Between Client and Server

Developing an app using MEAN is simple and efficient because developers can write the client side and server side code in one language, JavaScript. The complete project can be coded by a JavaScript coder using MEAN Stack and a developer can deploy the application directly on the server using Node.js. This method doesn’t require a standalone server.

MEAN Allows Isomorphic Coding

One of the biggest advantages of using MEAN Stack is that it allows you to transfer code between various frameworks seamlessly. This has made MEAN very popular with both developers and companies looking for ways to transcend applications and web development projects.

MEAN Supports MVC architecture

MEAN Stack allows for Model View Architecture (MVC) which basically divides the application into three interconnected but distinct parts. This separates the information that developers need to see and the way they see it from the way the end user needs to see it. This allows MEAN Stack development teams to be effective and efficient.

Mean Is Highly Flexible

After successful completion of an application development process using MEAN, you can test it easily on the cloud platform. MEAN also allows you to add additional information by adding the field directly to your form. MongoDB. provides automatic replication and cluster support and is designed specifically for the cloud platform.

MEAN Uses JavaScript Object Notation (JSON)

MEAN stack uses JSON as the format for data interchange across all its layers. Both AngularJS and Node.js frameworks use JSON, which means that no libraries are required to convert data between a client and server interaction.

MEAN is Cost Effective

To develop applications using MEAN Stack, you only require developers who are proficient in JavaScript. Whereas, for example, if you’re using the LAMP Stack, your developers need to be skilled in MySQL, JavaScript, and PHP. When you consider cost-to-company, using MEAN Stack requires fewer developers which translate to additional savings in terms of time and money spent to hire, train, and maintain those developers.

MEAN Is Fast And Reusable

The open and non-blocking architecture of Node.js makes it very fast. Another component of MEAN, Angular.js is an open source JavaScript framework that makes it easy to test, maintain, and reuse code.

MEAN Is Open Source and Cloud Compatible

MEAN Stack and its underlying technology components, MongoDB, Express, Angular.js, and Node.js are an open source technology platform and are free to use. The technology development process uses libraries and public repositories which significantly reduces development costs. Additionally, MongoDB enables deployment of cloud technologies, which further reduces disk space requirement and costs.

Takeaway

If you need an efficient and effective tool to develop a modern, responsive, dynamic, and affordable web application, then MEAN Stack is the ideal solution. The fact that MEAN is open source means that it is very versatile and is updated frequently by an extremely large developer community. If you want to learn more, you can enroll in a MEAN Stack Web Development course.

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JavaScript developers should you be using Web Workers?

JavaScript developers should you be using Web Workers?

Do you think JavaScript developers should be making more use of Web Workers to shift execution off of the main thread?

Originally published by David Gilbertson at https://medium.com

So, Web Workers. Those wonderful little critters that allow us to execute JavaScript off the main thread.

Also known as “no, you’re thinking of Service Workers”.

Photo by Caleb Jones on Unsplash

Before I get into the meat of the article, please sit for a lesson in how computers work:

Understood? Good.

For the red/green colourblind, let me explain. While a CPU is doing one thing, it can’t be doing another thing, which means you can’t sort a big array while a user scrolls the screen.

This is bad, if you have a big array and users with fingers.

Enter, Web Workers. These split open the atomic concept of a ‘CPU’ and allow us to think in terms of threads. We can use one thread to handle user-facing work like touch events and rendering the UI, and different threads to carry out all other work.

Check that out, the main thread is green the whole way through, ready to receive and respond to the gentle caress of a user.

You’re excited (I can tell), if we only have UI code on the main thread and all other code can go in a worker, things are going to be amazing (said the way Oprah would say it).

But cool your jets for just a moment, because websites are mostly about the UI — it’s why we have screens. And a lot of a user’s interactions with your site will be tapping on the screen, waiting for a response, reading, tapping, looking, reading, and so on.

So we can’t just say “here’s some JS that takes 20ms to run, chuck it on a thread”, we must think about where that execution time exists in the user’s world of tap, read, look, read, tap…

I like to boil this down to one specific question:

Is the user waiting anyway?

Imagine we have created some sort of git-repository-hosting website that shows all sorts of things about a repository. We have a cool feature called ‘issues’. A user can even click an ‘issues’ tab in our website to see a list of all issues relating to the repository. Groundbreaking!

When our users click this issues tab, the site is going to fetch the issue data, process it in some way — perhaps sort, or format dates, or work out which icon to show — then render the UI.

Inside the user’s computer, that’ll look exactly like this.

Look at that processing stage, locking up the main thread even though it has nothing to do with the UI! That’s terrible, in theory.

But think about what the human is actually doing at this point. They’re waiting for the common trio of network/process/render; just sittin’ around with less to do than the Bolivian Navy.

Because we care about our users, we show a loading indicator to let them know we’ve received their request and are working on it — putting the human in a ‘waiting’ state. Let’s add that to the diagram.

Now that we have a human in the picture, we can mix in a Web Worker and think about the impact it will have on their life:

Hmmm.

First thing to note is that we’re not doing anything in parallel. We need the data from the network before we process it, and we need to process the data before we can render the UI. The elapsed time doesn’t change.

(BTW, the time involved in moving data to a Web Worker and back is negligible: 1ms per 100 KB is a decent rule of thumb.)

So we can move work off the main thread and have a page that is responsive during that time, but to what end? If our user is sitting there looking at a spinner for 600ms, have we enriched their experience by having a responsive screen for the middle third?

No.

I’ve fudged these diagrams a little bit to make them the gorgeous specimens of graphic design that they are, but they’re not really to scale.

When responding to a user request, you’ll find that the network and DOM-manipulating part of any given task take much, much longer than the pure-JS data processing part.

I saw an article recently making the case that updating a Redux store was a good candidate for Web Workers because it’s not UI work (and non-UI work doesn’t belong on the main thread).

Chucking the data processing over to a worker thread sounds sensible, but the idea struck me as a little, umm, academic.

First, let’s split instances of ‘updating a store’ into two categories:

  1. Updating a store in response to a user interaction, then updating the UI in response to the data change
  2. Not that first one

If the first scenario, a user taps a button on the screen — perhaps to change the sort order of a list. The store updates, and this results in a re-rendering of the DOM (since that’s the point of a store).

Let me just delete one thing from the previous diagram:

In my experience, it is rare that the store-updating step goes beyond a few dozen milliseconds, and is generally followed by ten times that in DOM updating, layout, and paint. If I’ve got a site that’s taking longer than this, I’d be asking questions about why I have so much data in the browser and so much DOM, rather than on which thread I should do my processing.

So the question we’re faced with is the same one from above: the user tapped something on the screen, we’re going to work on that request for hopefully less than a second, why would we want to make the screen responsive during that time?

OK what about the second scenario, where a store update isn’t in response to a user interaction? Performing an auto-save, for example — there’s nothing more annoying than an app becoming unresponsive doing something you didn’t ask it to do.

Actually there’s heaps of things more annoying than that. Teens, for example.

Anyhoo, if you’re doing an auto-save and taking 100ms to process data client-side before sending it off to a server, then you should absolutely use a Web Worker.

In fact, any ‘background’ task that the user hasn’t asked for, or isn’t waiting for, is a good candidate for moving to a Web Worker.

The matter of value

Complexity is expensive, and implementing Web Workers ain’t cheap.

If you’re using a bundler — and you are — you’ll have a lot of reading to do, and probably npm packages to install. If you’ve got a create-react-app app, prepare to eject (and put aside two days twice a year to update 30 different packages when the next version of Babel/Redux/React/ESLint comes out).

Also, if you want to share anything fancier than plain data between a worker and the main thread you’ve got some more reading to do (comlink is your friend).

What I’m getting at is this: if the benefit is real, but minimal, then you’ve gotta ask if there’s something else you could spend a day or two on with a greater benefit to your users.

This thinking is true of everything, of course, but I’ve found that Web Workers have a particularly poor benefit-to-effort ratio.

Hey David, why you hate Web Workers so bad?

Good question.

This is a doweling jig:

I own a doweling jig. I love my doweling jig. If I need to drill a hole into the end of a piece of wood and ensure that it’s perfectly perpendicular to the surface, I use my doweling jig.

But I don’t use it to eat breakfast. For that I use a spoon.

Four years ago I was working on some fancy animations. They looked slick on a fast device, but janky on a slow one. So I wrote fireball-js, which executes a rudimentary performance benchmark on the user’s device and returns a score, allowing me to run my animations only on devices that would render them smoothly.

Where’s the best spot to run some CPU intensive code that the user didn’t request? On a different thread, of course. A Web Worker was the correct tool for the job.

Fast forward to 2019 and you’ll find me writing a routing algorithm for a mapping application. This requires parsing a big fat GeoJSON map into a collection of nodes and edges, to be used when a user asks for directions. The processing isn’t in response to a user request and the user isn’t waiting on it. And so, a Web Worker is the correct tool for the job.

It was only when doing this that it dawned on me: in the intervening quartet of years, I have seen exactly zero other instances where Web Workers would have improved the user experience.

Contrast this with a recent resurgence in Web Worker wonderment, and combine that contrast with the fact that I couldn’t think of anything else to write about, then concatenate that combined contrast with my contrarian character and you’ve got yourself a blog post telling you that maybe Web Workers are a teeny-tiny bit overhyped.

Thanks for reading

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Further reading

An Introduction to Web Workers

JavaScript Web Workers: A Beginner’s Guide

Using Web Workers to Real-time Processing

How to use Web Workers in Angular app

Using Web Workers with Angular CLI