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Java Script is a programming language used for running the client’s side. Any code that is written in Java Script is actually run from the user’s browsers than from the server. Java Script can be used to implement any neat attributes to a web design. But besides some positive sides of using Java Script, there are some disadvantages as well.
The Advantages of Using Java Script
- Java Script Validation: It can provide a great solution when validating input forms on the client’s side. If a user misses to fill a required criterion in the form, then Java Script validation can generate a pop up message as a warning to the user. This kind of validation is taken to be better than a server side validation. Similar forms can be created with PHP or ASP but with Java Script, a user cannot submit the form without completely filling it.
- Dynamic Image Effects: Java Script can be used to create dynamic effects. With it scripted slideshows and rollover images can be programmed. With the use of this script, the appearance of a user’s screen can also be altered after the server sends the page.
The Disadvantages of Using Java Script
- Extended Coding: The use of Java Script in web design can even cause the web pages to expand. When Java codes are used, it can extend to several lines of code. So Java Script codes are stored in separate Java Script source file. For a readable and cleaner web page, these codes are thus separately stored.
- Reduces Search Engine Friendliness: Use of Java Script coding for a website reduces its search engine friendliness. If the Java Script coding is not stored separately, then the search engine crawlers find it difficult to crawl the web pages for keywords and content.
Due the different advantages and disadvantages of using Java Script in web design, it is better to use Java coding in external script files. By doing this the content and the design of the web page can be kept separated.
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Thanks for this post – it is important in most aspects of web design/developement to know that there are always 2 sides to any argument. I agree that javascript is good for creating cool client-side effects but in the long run – if your are wanting good rankings in the search engines etc – then it is best to keep this sort of code to a minimum. Never go over-board with any sort of code other than html (or dynamic outputted html) and try to keep your source code as clean as possible.