Tag Archives: JavaScript

A Quick Guide to Loading Javascript Faster

how to load javascriptJavaScript is one of the most expensive parts of your website or app. Most mobile and desktop sites run using JavaScript, and they often group all of their JS code into a single package. However, loading all of the code at once can delay interactivity and increase loading times, especially when JavaScript is used on mobile devices. This means that your website or app loads slower and that your users often need to wait a while before they can use your site or app.

Unnecessary JavaScript code can affect your customers’ user experience and may even dissuade them from visiting your website or using your app altogether. This is especially true for users who have mobile devices with slower processors or customers who are using a slower network connection.

JavaScript Processing Times: How Long are Your Users Really Waiting?

According to a Net Magazine article published in July 2018, JavaScript processing times more than sextuple between high-end devices and smartphones with “average” capabilities. When loading CNN.com, a typical smartphone (the Moto G4) loaded the site nine seconds slower than the iPhone 8, and an inexpensive smartphone needed 32 seconds more to load the website compared to the same iPhone. Unsurprisingly, a desktop and laptop with a Core i7 processor loaded the site the fastest of all. However, in today’s day and age the mobile user experience cannot be dismissed. According to the Pew Research Center, over 77% of all U.S. adults own a smartphone, and one-in-five are smartphone-only internet users.

Given the rapid adoption of mobile technology, and the plentitude of mobile apps and websites available to users, the mobile user experience is of the utmost importance in today’s marketplace. Even if your target audience is expected to own high-end devices, the phones may not always be used in an optimal environment. Site loading times are also affected by the users’ data coverage or the strength of their current network, which is often lacking in a busy work environment or a public WiFi zone.

Fortunately, learning how to load JavaScript faster is as easy as reading this article. Here are some tips to lessen your JavaScript burden and enhance your customers’ user experience.

Code Splitting

Many modern apps and websites group their JavaScript code into one enormous bundle. Code splitting provides an alternative by dividing the code into smaller sections. Only the essential code is loaded up front, which lessens the time needed to load the page. The rest of the code is loaded on an as-needed basis.

If your app employs a heavy use of frameworks and libraries, code splitting will almost certainly improve the quality of your customers’ user experience.

Tree Shaking

While code splitting puts JavaScript code into manageable sections, it does not address code that is never used. Young apps tend to use most of their JavaScript, but as the app ages, more code is added without removing the sections that are no longer needed.

Tree shaking, or the elimination of dead code, addresses this issue by pulling in certain parts of ES6 modules. If some of your JavaScript libraries do not respond to tree shaking, check to see if their methods are exported using ES6 syntax. Whether your website or app will greatly benefit from tree shaking depends on its particular dependencies and architecture. In any case, it’s worthwhile to eliminate any dead code that you can.

JavaScript Measurement and Optimization

Several tools are available to help you measure, monitor, and optimize the JavaScript code on any given page. Lighthouse, part of the Chrome Developer toolbox, offers an in-depth analysis to improve optimization. It can also bring attention to code that may need a lot of time to parse or compile, thereby delaying interactivity. This audit can advise you to split up the code or do less work.

Code Coverage, another part of the Chrome Developer set, can uncover unused JavaScript and CSS in your code by displaying how much code was executed versus how much was loaded. With this knowledge, you can focus on the code that your users need.

Sending Less JavaScript with Performance Budgets

Performance budgets for your website provide clear, measurable figures to keep everyone accountable to the goals for the website or app. Mobile sites should aim for a JS budget of no more than 170KB compressed, which equals approximately 0.7MB of uncompressed code. By working within the budget’s constraints, the site’s performance becomes a constant consideration instead of an afterthought to be addressed down the line.

These budgets can be defined in three ways: milestone timings, which are created in accordance with the user experience on the page; quality-based metrics, which are based on the browser experience using raw figures; and rule-based metrics, which are scores formulated by other tools (e.g., Lighthouse).

Users have a multitude of websites, apps, and companies vying for their attention. A slow-loading site not only affects the user experience on mobile sites, but it can also result in lost leads, conversions, and purchases.

If your site uses a lot of unnecessary code, Santex consulting can re-configure your JavaScript. Our specialized knowledge comes from years of experience in working with numerous platforms, websites and apps. This allows us to attend to your project’s needs, wants, and constraints in an optimal way.Download Ebook Software Development

The Top 7 Most Popular JavaScript Frameworks Used in 2018

popular javascript frameworksJavaScript is constantly changing, and 2018 has been no different. Although certain aspects of the JavaScript community remain constant, such as the open-source run-time environment of Node.js, numerous frameworks frequently enter the scene. With dozens of frameworks to choose from, it can be challenging to find the best platform for your project. Looking at the most popular JavaScript frameworks can help you figure out what framework may be best for your application, project, or development team.

Here are some of the most popular JavaScript frameworks of 2018.


React, which is developed and maintained by Facebook, has been a major influencer for most popular JavaScript frameworks used today. Given its origins and massive community, it has a stability not seen in many of the newer frameworks on the market. As React was created with two-way data binding in mind, it reduces the need to execute frequent DOM operations. Not only can React Native provide a smooth mobile experience alongside your React application for the web, but the use of JSX may help your project to be more SEO-friendly than other JavaScript frameworks.

A possible, although seemingly minor, concern is Facebook’s ability to eventually stop updates or to change the licensing. However, this has not stopped React from turning into one of the most popular JavaScript frameworks of the year.

Unlike Angular (see below), React is still the most popular JavaScript framework, with the most downloads across the three years that data has been tracked. Not only that, React just keeps getting better with age and it promises to be at its current best in 2019.


Known as a framework for “ambitious” developers, Ember is known for its transparency, flexibility, and ability to create complex client-side applications. For developers who are willing to abide by the platform’s rigid best practices, its simplicity and flow of functionality make it easy to get an application up and running quickly. The “ember-cli” command line tool package adds several useful tools to assist developers. The Ember Inspector allows for easy inspection of Ember objects in the browser while developing and debugging problems.

Angular 2

Angular 2, which is developed and maintained by Google, is currently the most popular JavaScript framework on the market. It is often used to develop front-end applications that are large, feature-filled platforms with immense data needs. Unlike React, Angular 2 uses one-way data binding to facilitate DOM operations, which helps developers increase the performance of single-page applications. With several years of development, a predecessor, and the power of Google behind it, this framework has a list of useful features (e.g., dependency injection, forms, templates) and will continue to improve with time.


JavaScript Frameworks React NodeJsUnlike other JavaScript frameworks, Meteor is full-stack and can be used to develop both the  front-end and back-end sections of a project. Both server-side and client-side coding, such as databases and UI, can be addressed with just one framework. It has numerous ready-to-use “smart packages” and also allows the generation of custom packages, providing value for both new developers and seasoned experts. Meteor has one of the most dedicated and engaged communities among the JavaScript frameworks, which comes in handy for support in popular forums and the development and maintenance of packages for public use.


Aurelia is a modern framework that is designed to be practical. As it’s composed of smaller modules, developers can either work with the entire framework or choose separate sections. Aurelia also supports ES5, ES 2015, ES 2016 and TypeScript, giving it the flexibility to be used alongside various JavaScript development situations.


Mithril is one of the leaner frameworks on our list, designed to get a project developed and running with ease. With a compressed library size of 7.8 kb and straightforward documentation, Mithril is a pragmatic choice for developers who want a program that can deal with much of the work that typical JavaScript frameworks handle without the fuss. Although lean, the framework is updated constantly.


Vue has a simpler learning curve when compared to the larger, more complex frameworks. Its small size makes it easy to incorporate into other languages or applications, and its documentation is accessible to both new developers and veterans. Vue also uses an HTML-based templating syntax, so components can be written quickly and simply.

Choosing the right JavaScript framework depends on a variety of factors, and the list of possible choices changes every year. At Santex, we have expertise in a variety of JavaScript frameworks, programs, and environments, such as React and Node. We provide this expertise as part of our custom web development services to create the optimal project for your company. We are strongly committed to providing top quality web development services, and we incorporate our values of integrity, collaboration, service, and leadership with our technical expertise to meet your specialized software needs.

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