Scripting Languages: What are they?
Scripting languages are a type of programming language that controls a specific software application. One example is JavaScript, that controls slight behaviour of a Web browser. For example, JavaScript in a particular fashion is an event-driven scripting language, so in this way, upon an event taking place, JavaScript “springs into action”. One JavaScript code could wait for an event when the user tries to close the tab or browser, and a message box will appear upon the event happening. As such, JavaScript is a client-side scripting language.
What is a client-side scripting language?
Client-side scripting languages are like any form of scripting language but the browser in some form is the interpreter. As such, a server-side scripting language would be a different type of scripting language genre, but in this case the interpreter is a virtual machine inside a server. In this case, the server is a physical machine that has the virtual interpreter installed on it. Basically, a virtual interpreter reads the scripting code, and translates it to HTML code of that specific result, which the browser can understand, and the same pattern would happen with the browser (HTML code -> bytecode -> screen). In this case, the screen part is where the text is displayed on the users screen.
Why have scripting languages?
Unfortunately computers aren’t like humans, and as a result can’t understand human speech commands that we say. For example, in a command-line interface, if we wanted the computer to open a specific file, we couldn’t just say “open notepad.exe” - the computer would just respond and say “unknown command”. The reason there are scripting languages are for a computer to accomplish a specific task. There are many variety of scripting languages out there, and different scripting languages are for different tasks. For example, JavaScript is a client-side scripting language and mainly an event-driven scripting language, and hence, it usually waits for events to happen. JavaScript is commonly known to be used for pop-ups, and in use with web-forms for validation purposes. Another good purpose of JavaScript is that it is capable of changing images as the mouse moves over them. Much like desktop programming languages which are mostly event-driven as well.
There are other scripting languages that are used for general-purpose activities, for example creating dynamic Web pages to create interactivity to the visitor. In such a sense, we mean that, for example, a page could display two different things. If the user is using Firefox, some text with “You are using Firefox” would be displayed, conversely, if the user is using Internet Explorer, some text would display “You are using Internet Explorer” instead. This is one form of dynamic Web pages, but of course many scripting languages could do things at a much higher-level scale than just this. Another example is creating a text-based game, completely coded in a scripting language.
Just for your information, there is a distinct differentiation between scripting languages and good old HTML. HTML alone cannot create dynamic Web pages, as such some of the examples explained in the preceding sections. HTML was created for the building of Web pages, and as a result, it is a static language, and is the structuring of Web pages (and in some cases the styling of Web pages, too).
How do I learn a scripting language?
First of all you need to understand whatever scripting language you want to go for and what exactly it does. If you want to go for client-side scripting languages, JavaScript may be a good option. And in another criteria, for server-side scripting, PHP may be a good option, as a general-purpose scripting language. Nonetheless, whatever scripting language you go for, you need to look into what exactly it is, and understand the concepts of it first. If you want more information on PHP, you can pop on over to PHP’s official Website, PHP.net and JavaScript resources and tutorials can be found with a little searching with Google.com.
Good luck!
