JavaScript

JavaScript is a widely used computer scripting language also known as ECMAS. It copies a lot from Java but the two have very different semantics and should not be confused as one. It supports higher-order functions and has closures and this makes it a functional programming language. Other functional programming languages are Scheme and OCaml. To provide websites that are more dynamic and come up with better user interfaces, it was important to have it as a part of a web browser. It is not only used in web pages but also in site-specific browsers, PDF documents and even on desktops. Its Node.js is faster and used much in server-side web apps.

JavaScript runs in a very wide range of environments. In fact, if you need to debug it, you just need to test it across browsers. Note that no browsers that may vary from the standard or from each other execute it. This can be solved by coming up with a standards-compliant code which many browsers will be able to execute well. It is possible to come across browsers that implement a certain feature but behave completely differently. The browser, which is running, can be altered so that behaviours match. There are tool-kits and libraries that are designed to take care of browser differences and these can be employed too. Again, scripts do not work for all users. These include those browsing through phone or PDA, those using speech browsers etc.

It is important in any environment to take care of persons with disabilities. This special group should have access to information just like anyone else. Therefore, to improve accessibility, JavaScript should be written in such a way that those with disabilities have a comfortable experience. The visually impaired can be assisted if screen readers are JavaScript-aware. It should not rely on a mouse to operate and it should not require keyboard event at all. Onfocus or Onchange will be preferred mostly. It should be easy for all users of the web and not confusing at all. It should also not be used for malicious purposes, for example, to alter in any way that a browser functions.

Security-wise, there are many malicious authors out there and it is unfortunate that JavaScript provides a potential for them. This risk can be beaten by ensuring that scripts will run in a sandbox where only web-related actions can be done. Also, ensure that a web site’s script cannot access information that is being sent to another site. Cross-site scripting is common and this violates the same-origin policy. When data that is not trusted is displayed, one should use HTML escaping immediately. There are various other security concerns all of which can be solved too.

Our software development experts’ team allows us to offer custom made programs for any business category. JavaScript was used in following projects: Short Sale Online Marketplace, iPhone Trivia Application, Online Real Estate Marketplace, File and Document Storage System, Music Production Library, Ronald McDonald House Charities Latvia Website, DSA Training System, Social Web Portal.