Introduction to D3.js Library

What is D3.js?

D3.js stands for Data-Driven Documents is front-end visualization library in javascript for creating interactive and dynamic web-based data visualizations, it also has an active community behind it for which it is very famous. It uses HTML, CSS a, and SVG to bring data to life and mainly it is for manipulating DOM objects, focusing on objects and concepts, not just the pre-built charts and graphs. It is mostly compatible with popular web browsers, like Chrome or Firefox.

It can even create different shapes arcs, lines, arcs, rectangles, and points. The essential feature of d3.js that it provides the beautiful fully customized visualizations. It is a suite of small modules for data visualization and analysis. These modules work well together, but we should pick and choose the parts that we only need. D3 most complex concept is selections and if we are using a virtual DOM framework like React (and don’t need transitions), so don’t need selections at all.

A basic Introduction how to use D3.js?

So, we need to create a visualization with d3, set up workspace inside a container, create x and y-axes, process data and draw graphs and charts using functions. We can also add different attributes and styles for datapoints or lines. When creating basic charts and graphs, D3 is not complicated, for customization need to add more code. More complex visualizations need lots of logic, layouts, and data formatting as these are the keys that we want our visualization to speak for.

D3 also can be paired with a WebGL library, which makes more standard capabilities regarding dynamic and interactiveness. We can even animate one element, based on transitions similar to those done in CSS.

Why we use D3.js?

Today different kind of charting libraries and BI tools are available for creating visualizations, so the question arises why to use d3.js for creating visualizations, because of its key features versatility, full customization, and interactive visualization, even the exactly the data visualization that can be made by graphic designers.

Data visualization is very hard then we think. It is easy to draw shapes, but sometimes visualizations require full customization such as a need to bring subtle ticks and different smooth curves between data points. That is where d3.js comes in that allows us to explore the design space quickly. It is also not only a charting library but acts as a versatile coding environment that can be best used for making complex visualizations.

When to use D3.js?

As d3.js becomes complicated sometimes, programming in d3 should be done from scratch and requires a steep learning curve, but due to its significant advantages, we need to use it and get to decide when to use that library. We should use D3.js when our web application is interacting with data. We can explore D3.js for its graphing capabilities and make it more usable. It can be added to the front end of our web application as the backend server will generate the data and front-end part of the application where the user interacts with data use D3.js.

Some of the use cases of D3.js

We above discussed about data visualization basics, d3.js front-end visualization library concepts, where and when to approach d3.js library, now go through some of the use cases of d3 as d3 with complex code also provide reusable code that can be used again in other visualizations, d3 also can be used to react, storytelling with customized and visualizations the most crucial use case can also be achieved with d3. Some of the use cases of the d3 library are discussed below:

Reusable charts with D3.js

During creating visualizations, we also need to take care of reusability of the charts or anything that made in visualization. Let’s discuss how D3.js library provide the reusable charts, and firstly we should know what can be a reusable chart, some of the characteristics that a reusable chart has –

Built charts in an independent way –

We need to make all charts elements associated with data points of dataset independently. This has to do with the way D3 associates data instances with DOM elements.

  • Repeatable – Instantiate the chart more than one time, as chart visualizing chart with different datasets.
  • Modifiable – Source code of charts can be easily be refactored by other developers according to different needs.


We need to modify only the appearance and behavior of the graph without changing the code.

Some of the best practices to make reusable charts with d3.js

Built charts in an independent way

To make the chart reusable with d3.js, it should be repeatable, modifiable, configurable and extensible.

To make chart repeatable in d3.js we can use the object-oriented property and approach chart.prototype.render and also use this property during a call the functions.

To make the modifiable chart make source code with simple transformations with d3.js built-in functions, so that path to modification in the system becomes clear and easy to be modified by the other developers.

Easy modification path can be achieved by using various selection functions .enter(), .exit() and .transition().

enter() selection – When a dataset contains more items than the DOM elements, data items stored in entering the selection.

For example –

We need to make some modification to our dataset. We add one more data item to the array, as our bar chart contains still only four bars of data, that time choose data element from entering the selection.

A room visualization, with several chairs that are DOM elements and guests that are data items, sit on the chairs which are data joined with DOM elements. The enter selection is the waiting area for data items that enter the room but cannot be seated, as there are not enough chairs. As to arrange more chairs, where to create new bar div and add it to DOM is what done by d3 selector enter.

exit() selection – As we discuss how we could add new items to a data set dynamically and update the visualization. In the same way, we can remove items from the data set and allow D3 deal with the corresponding DOM elements or, following our room/chair method, take away those chairs that are not needed anymore because some guests decided to leave. The exit selection does this. It contains only those data items that are about to leave the data set.

Configurable –

Consider the visualization of the bubble chart, to make it reusable, only the size of the chart and input dataset needs to be customized.

Define Size of the chart

   var bubbleChart = function () {
	     var width = 500,
    height = 500;
    function bubblechart(select){
    return chart;

We want to create charts of different sizes without the need to change the code. Create the charts as follows

     var chart = bubbleChart().width(500).height(500);

Now we will define accessors for the width and height variables in the bubble_chart.js file –

    // bubble_chart.js
    var bubbleChart = function () {
    var width = 500
    height = 500;
    function chart(select){

    chart.width = function(val) {
        if (!argu.len) { return width; }
        width = val;
        return chart;

    chart.height = function(val) {
        if (!argu.len) { return height; }
        height = val;
        return chart;

      return chart;

Role of Data Visualization in D3.js

As over the last few years, data visualization growing more and more in a day to day experience. We see data visualization daily in our social media, news articles and every day at work. Data visualization is that it translates quantitative data into graphic representations using libraries i.e D3.js Library. Data visualization includes tasks of designing, creating and deploying is not just a single profession at all but shows a combination of work of designers, analysts, engineers, and journalists. As for data visualization tasks engineers use different javascript libraries, and analysts use various business intelligence tools.

Nowadays we able to collect and analyze more and more data than ever before. Big data is a hot topic even now and a major to study. But to be able to understand and digest all these kind of numbers, we need visualization and a platform or framework that makes all kinds of visualizations possible, no matter how much data there is need to process, that’s where d3.js and other visualizations tools come in.

Only plotting the charts with visualization libraries and tools is not enough; we need storytelling art here also. As most of the libraries and tools exist here not provides the effective display of quantitative information, where D3.js most successful library comes in that already tells half of the story when we start developing the code for it.

Data Visualization using D3.js with React

As D3 enter, exit and update pattern provides full control to the developer for managing the DOM. We can manage when should element is added to the screen and when it is removed and how to update the element. It is working fine when the updates of data elements are simple, but it gets complex when there exists a lot of data elements to keep track of, and the data elements to update vary from one user action to another. One solution to manage the DOM data elements is manually counted which elements require updates, but it also becomes complex we could not keep the count in our heads, as that is manually defining the DOM tree which is not recommended, so there is need to integrate react and D3 together for complex visualizations.

As react that updates virtual DOM are exactly like D3 enter, exit and update pattern. So let’s use d3 with react, react for what to enter and exit operations and d3 for update patterns. Discuss react with d3 implementation in a few steps –

Drawing Basic Shapes With D3

Let’s start with creating the basic shapes in D3. But we can’t do that just by adding the SVG shapes directly to the HTML page, SVG shapes require an SVG container. All the shapes inside that container can be relatively adjusted henceforth — for example, change in one curve affecting another curve or changes in coordinates changing the shapes of curves or positions of points inside that container.

We can add the container to the body of HTML page with the append() method and then adding shapes to that container. Here, the container is 600px wide and high.

var canvas ="body")
                   .append("svg")         //SVG container
                   .attr("width",  600)   //Width of the container
                   .attr("height", 600)   //Height of the container

var circle = canvas.append("circle")
                    .attr("cx", 250)      //Circle at the (250,250) coordinates
                    .attr("cy", 250)
                    .attr("r", 60)        //Radius of the circle is 50px
                    .attr("fill", "green")//Fill the circle with red color

var rect = canvas.append("rect")           // By default the shapes are drawn from upper left
                   .attr("width", 300)     //corner of the SVG container
                   .attr("height", 100)
                   .attr("fill", "red");

var line =canvas.append("line")
                   .attr("x1", 0)
                   .attr("y1", 40)
                   .attr("x2", 400)
                   .attr("y2", 400)
                   .attr("stroke", "yellow")
                   .attr("stroke-width", 10);

Binding Data With Visualization

After learning to draw the basic shapes in D3, we need to draw meaningful curves on the screen that are influenced by the data. To do that, we need to bind the data with DOM elements that can visually represent the data in any form (bar chart, pie chart, histogram, geographical graphs, etc.). In the real world, the actual data is large and most probably in a JSON or CSV file, but here, for demo purposes, data is taken in the array of some elements.

var dataArray = [60, 25, 45, 30];

This data array will be used to draw a simple histogram. The process of drawing a histogram is explained line by line. The below code is assumed to be inside the `` tags.

var array = [60, 25, 45, 30];

var canvas ="body")
                 .attr("width", 600)
                 .attr("height", 600);

var bars = canvas.selectAll("rect") //Empty selection
                   .enter() //This method holds the placeholder for array elements
                     .attr("width", function(d) { return d*10; })
                     .attr("height", 50)
                     .attr("y", function(d, i) { return i * 51 })

The code written for bars is of more significance, as now it is known how canvas is attained. The line canvas.selectAll(“rect”) is a little confusing because there is no DOM element named rect to make a selection. This line returns the empty selection, which can be used to draw individual bars for our histogram. The .data() method binds our data to whole selection. To fill each bar of the histogram, each element of the array is binded to one empty selection, and it is done with the .enter() method. There is more to explain about the .enter() method, but for now, just go with the flow. After binding each element of the array with the empty bar selection, we give shape to our bars with width and height attributes.

For width, we can use a fixed value, but that behavior won’t work for for us because we want to give width to each bar based on the data elements. To do that, the anonymous function is passed with the element from the array and it returns the width of an individual bar. The height of the bars is fixed. The attribute yis really interesting because, if not given, all the bars will lie over each other. This y attribute gives the vertical position of the bar relative upper-left corner of the canvas.

So now, you know the basics of D3.js. Thank you for reading and happy coding !

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Introduction to D3.js Library

Hire Dedicated Node.js Developers - Hire Node.js Developers

If you look at the backend technology used by today’s most popular apps there is one thing you would find common among them and that is the use of NodeJS Framework. Yes, the NodeJS framework is that effective and successful.

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Why use Node.js for Web Development? Benefits and Examples of Apps

Front-end web development has been overwhelmed by JavaScript highlights for quite a long time. Google, Facebook, Wikipedia, and most of all online pages use JS for customer side activities. As of late, it additionally made a shift to cross-platform mobile development as a main technology in React Native, Nativescript, Apache Cordova, and other crossover devices. 

Throughout the most recent couple of years, Node.js moved to backend development as well. Designers need to utilize a similar tech stack for the whole web project without learning another language for server-side development. Node.js is a device that adjusts JS usefulness and syntax to the backend. 

What is Node.js? 

Node.js isn’t a language, or library, or system. It’s a runtime situation: commonly JavaScript needs a program to work, however Node.js makes appropriate settings for JS to run outside of the program. It’s based on a JavaScript V8 motor that can run in Chrome, different programs, or independently. 

The extent of V8 is to change JS program situated code into machine code — so JS turns into a broadly useful language and can be perceived by servers. This is one of the advantages of utilizing Node.js in web application development: it expands the usefulness of JavaScript, permitting designers to coordinate the language with APIs, different languages, and outside libraries.

What Are the Advantages of Node.js Web Application Development? 

Of late, organizations have been effectively changing from their backend tech stacks to Node.js. LinkedIn picked Node.js over Ruby on Rails since it took care of expanding responsibility better and decreased the quantity of servers by multiple times. PayPal and Netflix did something comparative, just they had a goal to change their design to microservices. We should investigate the motivations to pick Node.JS for web application development and when we are planning to hire node js developers. 

Amazing Tech Stack for Web Development 

The principal thing that makes Node.js a go-to environment for web development is its JavaScript legacy. It’s the most well known language right now with a great many free devices and a functioning local area. Node.js, because of its association with JS, immediately rose in ubiquity — presently it has in excess of 368 million downloads and a great many free tools in the bundle module. 

Alongside prevalence, Node.js additionally acquired the fundamental JS benefits: 

  • quick execution and information preparing; 
  • exceptionally reusable code; 
  • the code is not difficult to learn, compose, read, and keep up; 
  • tremendous asset library, a huge number of free aides, and a functioning local area. 

In addition, it’s a piece of a well known MEAN tech stack (the blend of MongoDB, Express.js, Angular, and Node.js — four tools that handle all vital parts of web application development). 

Designers Can Utilize JavaScript for the Whole Undertaking 

This is perhaps the most clear advantage of Node.js web application development. JavaScript is an unquestionable requirement for web development. Regardless of whether you construct a multi-page or single-page application, you need to know JS well. On the off chance that you are now OK with JavaScript, learning Node.js won’t be an issue. Grammar, fundamental usefulness, primary standards — every one of these things are comparable. 

In the event that you have JS designers in your group, it will be simpler for them to learn JS-based Node than a totally new dialect. What’s more, the front-end and back-end codebase will be basically the same, simple to peruse, and keep up — in light of the fact that they are both JS-based. 

A Quick Environment for Microservice Development 

There’s another motivation behind why Node.js got famous so rapidly. The environment suits well the idea of microservice development (spilling stone monument usefulness into handfuls or many more modest administrations). 

Microservices need to speak with one another rapidly — and Node.js is probably the quickest device in information handling. Among the fundamental Node.js benefits for programming development are its non-obstructing algorithms.

Node.js measures a few demands all at once without trusting that the first will be concluded. Many microservices can send messages to one another, and they will be gotten and addressed all the while. 

Versatile Web Application Development 

Node.js was worked in view of adaptability — its name really says it. The environment permits numerous hubs to run all the while and speak with one another. Here’s the reason Node.js adaptability is better than other web backend development arrangements. 

Node.js has a module that is liable for load adjusting for each running CPU center. This is one of numerous Node.js module benefits: you can run various hubs all at once, and the environment will naturally adjust the responsibility. 

Node.js permits even apportioning: you can part your application into various situations. You show various forms of the application to different clients, in light of their age, interests, area, language, and so on. This builds personalization and diminishes responsibility. Hub accomplishes this with kid measures — tasks that rapidly speak with one another and share a similar root. 

What’s more, Node’s non-hindering solicitation handling framework adds to fast, letting applications measure a great many solicitations. 

Control Stream Highlights

Numerous designers consider nonconcurrent to be one of the two impediments and benefits of Node.js web application development. In Node, at whatever point the capacity is executed, the code consequently sends a callback. As the quantity of capacities develops, so does the number of callbacks — and you end up in a circumstance known as the callback damnation. 

In any case, Node.js offers an exit plan. You can utilize systems that will plan capacities and sort through callbacks. Systems will associate comparable capacities consequently — so you can track down an essential component via search or in an envelope. At that point, there’s no compelling reason to look through callbacks.


Final Words

So, these are some of the top benefits of Nodejs in web application development. This is how Nodejs is contributing a lot to the field of web application development. 

I hope now you are totally aware of the whole process of how Nodejs is really important for your web project. If you are looking to hire a node js development company in India then I would suggest that you take a little consultancy too whenever you call. 

Good Luck!

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Why is Vue JS the most Preferred Choice for Responsive Web Application Development?

For more than two decades, JavaScript has facilitated businesses to develop responsive web applications for their customers. Used both client and server-side, JavaScript enables you to bring dynamics to pages through expanded functionality and real-time modifications.

Did you know!

According to a web development survey 2020, JavaScript is the most used language for the 8th year, with 67.7% of people choosing it. With this came up several javascript frameworks for frontend, backend development, or even testing.

And one such framework is Vue.Js. It is used to build simple projects and can also be advanced to create sophisticated apps using state-of-the-art tools. Beyond that, some other solid reasons give Vuejs a thumbs up for responsive web application development.

Want to know them? Then follow this blog until the end. Through this article, I will describe all the reasons and benefits of Vue js development. So, stay tuned.

Vue.Js - A Brief Introduction

Released in the year 2014 for public use, Vue.Js is an open-source JavaScript framework used to create UIs and single-page applications. It has over 77.4 million likes on Github for creating intuitive web interfaces.

The recent version is Vue.js 2.6, and is the second most preferred framework according to Stack Overflow Developer Survey 2019.

Every Vue.js development company is widely using the framework across the world for responsive web application development. It is centered around the view layer, provides a lot of functionality for the view layer, and builds single-page web applications.

Some most astonishing stats about Vue.Js:

• Vue was ranked #2 in the Front End JavaScript Framework rankings in the State of JS 2019 survey by developers.

• Approximately 427k to 693k sites are built with Vue js, according to Wappalyzer and BuiltWith statistics of June 2020.

• According to the State of JS 2019 survey, 40.5% of JavaScript developers are currently using Vue, while 34.5% have shown keen interest in using it in the future.

• In Stack Overflow's Developer Survey 2020, Vue was ranked the 3rd most popular front-end JavaScript framework.

Why is Vue.Js so popular?

• High-speed run-time performance
• Vue.Js uses a virtual DOM.
• The main focus is on the core library, while the collaborating libraries handle other features such as global state management and routing.
• Vue.JS provides responsive visual components.

Top 7 Reasons to Choose Vue JS for Web Application Development

Vue js development has certain benefits, which will encourage you to use it in your projects. For example, Vue.js is similar to Angular and React in many aspects, and it continues to enjoy increasing popularity compared to other frameworks.

The framework is only 20 kilobytes in size, making it easy for you to download files instantly. Vue.js easily beats other frameworks when it comes to loading times and usage.

Take a look at the compelling advantages of using Vue.Js for web app development.

#1 Simple Integration

Vue.Js is popular because it allows you to integrate Vue.js into other frameworks such as React, enabling you to customize the project as per your needs and requirements.

It helps you build apps with Vue.js from scratch and introduce Vue.js elements into their existing apps. Due to its ease of integration, Vue.js is becoming a popular choice for web development as it can be used with various existing web applications.

You can feel free to include Vue.js CDN and start using it. Most third-party Vue components and libraries are additionally accessible and supported with the Vue.js CDN.

You don't need to set up node and npm to start using Vue.js. This implies that it helps develop new web applications, just like modifying previous applications.

The diversity of components allows you to create different types of web applications and replace existing frameworks. In addition, you can also choose to hire Vue js developers to use the technology to experiment with many other JavaScript applications.

#2 Easy to Understand

One of the main reasons for the growing popularity of Vue.Js is that the framework is straightforward to understand for individuals. This means that you can easily add Vue.Js to your web projects.

Also, Vue.Js has a well-defined architecture for storing your data with life-cycle and custom methods. Vue.Js also provides additional features such as watchers, directives, and computed properties, making it extremely easy to build modern apps and web applications with ease.

Another significant advantage of using the Vue.Js framework is that it makes it easy to build small and large-scale web applications in the shortest amount of time.

#3 Well-defined Ecosystem

The VueJS ecosystem is vibrant and well-defined, allowing Vue.Js development company to switch users to VueJS over other frameworks for web app development.

Without spending hours, you can easily find solutions to your problems. Furthermore, VueJs lets you choose only the building blocks you need.

Although the main focus of Vue is the view layer, with the help of Vue Router, Vue Test Utils, Vuex, and Vue CLI, you can find solutions and recommendations for frequently occurring problems.

The problems fall into these categories, and hence it becomes easy for programmers to get started with coding right away and not waste time figuring out how to use these tools.

The Vue ecosystem is easy to customize and scales between a library and a framework. Compared to other frameworks, its development speed is excellent, and it can also integrate different projects. This is the reason why most website development companies also prefer the Vue.Js ecosystem over others.

#4 Flexibility

Another benefit of going with Vue.Js for web app development needs is flexibility. Vue.Js provides an excellent level of flexibility. And makes it easier for web app development companies to write their templates in HTML, JavaScript, or pure JavaScript using virtual nodes.

Another significant benefit of using Vue.Js is that it makes it easier for developers to work with tools like templating engines, CSS preprocessors, and type checking tools like TypeScript.

#5 Two-Way Communication

Vue.Js is an excellent option for you because it encourages two-way communication. This has become possible with the MVVM architecture to handle HTML blocks. In this way, Vue.Js is very similar to Angular.Js, making it easier to handle HTML blocks as well.

With Vue.Js, two-way data binding is straightforward. This means that any changes made by the developer to the UI are passed to the data, and the changes made to the data are reflected in the UI.

This is also one reason why Vue.Js is also known as reactive because it can react to changes made to the data. This sets it apart from other libraries such as React.Js, which are designed to support only one-way communication.

#6 Detailed Documentation

One essential thing is well-defined documentation that helps you understand the required mechanism and build your application with ease. It shows all the options offered by the framework and related best practice examples.

Vue has excellent docs, and its API references are one of the best in the industry. They are well written, clear, and accessible in dealing with everything you need to know to build a Vue application.

Besides, the documentation at Vue.js is constantly improved and updated. It also includes a simple introductory guide and an excellent overview of the API. Perhaps, this is one of the most detailed documentation available for this type of language.

#7 Large Community Support

Support for the platform is impressive. In 2018, support continued to impress as every question was answered diligently. Over 6,200 problems were solved with an average resolution time of just six hours.

To support the community, there are frequent release cycles of updated information. Furthermore, the community continues to grow and develop with backend support from developers.

Wrapping Up

VueJS is an incredible choice for responsive web app development. Since it is lightweight and user-friendly, it builds a fast and integrated web application. The capabilities and potential of VueJS for web app development are extensive.

While Vuejs is simple to get started with, using it to build scalable web apps requires professionalism. Hence, you can approach a top Vue js development company in India to develop high-performing web apps.

Equipped with all the above features, it doesn't matter whether you want to build a small concept app or a full-fledged web app; Vue.Js is the most performant you can rely on.

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