Single Page Application
The Single Page Application is one of the hottest trends in mobile app development and stands as a technique for the design of a webpage that will load fast on the screen of a smart device. This new approach helps meet the public’s expectations of a mobile experience that parallels what they have with their desktop or laptops. Today, the quality of web design includes the site’s ability to retain a visitor. Long loading time correlates with lost revenues. Only one second separates the engaged viewer and the user who gets too impatient and clicks away without even seeing the webpage. The Single Page Application improves the customer experience by providing immediate responses.
When is a website fast enough?
The definition of “fast enough” may be subjective. Google describes it as an amount of time small enough that a user remains focused on the experience and does not get distracted by the time lag introduced by the browser to server communications. User impatience can be measured statistically.
Out of the 42.6 percent of the world’s population, reported by BankMyCell, that own a smartphone, most will tolerate up to two seconds for a website to appear. More than half will abandon a slow site after three seconds. Google recommends an app download time of fewer than two seconds, and once downloaded, the website needs to respond in less than 100 milliseconds.
What is a Single Page Application?
SPA contrasts in operational efficiency with Multiple Page Applications or MPAs. MPAs are the more traditional web design, where websites are comprised of multiple HTML files linked together in a hierarchical structure and sent out from an internet server. These websites typically utilize 1.3 MB to 2.5 MB of content on average, according to MachMetrics. The time needed to download the files gets lengthened by mobile phone CPUs, slower than desktop browsers, and graphics interfaces that feed pixel-laden data travelling through cellular networks with a lower bandwidth than a desktop connected to a Wi-Fi system.
Benefits of SPAs
Single Page Applications give the appearance of seamless user experience with simple layouts, easy navigation, adaptive format to various mobile screen sizes, and communications between browser and server kept to the absolute minimum.
As the format only uses one HTML file, the site’s entire content resides in a single location on the client-side. Navigation is far simpler with no page hopping or the associated time that it would take to load other pages.
Debugging and upgrading become simpler with the swift load times, especially within the Chrome browser’s inspection function. Additionally, sharing SPA formatted sites is easier to do on social media due to the small number of files to load, enabling more traffic to come to the site.
Disadvantages of SPAs
SPAs are vulnerable to memory leaks and Cross-site Scripting attacks. Memory leaks happen when script programs fail to discard no longer needed user information, causing a slowdown within the device. Cross-site Scripting, or XSS, is a malevolent code that takes advantage of the SPA’s coding foundation on the client-side. There is a wide range of severity for these attacks. Benign attempts may be cookie thefts. Severe attacks lift users’ private information typically targeting a website that solicits user-input comments. These situations can be averted with a scanner for malicious code.
Top Frameworks for Developing Single Page Applications
Single Page Application sites have become trendy for their simple structure and easy navigation. They provide a simple architecture for app developers and free up time for well-functioning and visually appealing sites. Fast load times and mobile adaptability also boost SPA’s attractiveness, and help websites sustain the viewer’s engagement. Since the code resides in the browser, additional approaches need to be integrated to ensure that the site is known to search engines and equipped with anti-virus detectors to keep malicious code at bay from SPAs.