JavaScript can also be used to dynamically update part of a page without needing to reload the entire page. Once that field is fixed then the form will be allowed to be submitted. If the code notices that you've forgotten to enter something in one of the fields (For example, your email address) it would pop up a warning and not let you submit the form until it is complete. So that when you try to submit a form the code runs and looks at each field on the form. Instead of a webpage just being a plain page that has no interactivity, JavaScript can allow webpages adapt to what you do on the page, load new information, make decisions and respond to events.įor example, JavaScript might be used to validate a Mailing List Subscription form. Generally speaking, it is used to allow Website developers to create web pages that have some intelligence built in to them. There are many, many things that it can be used for. JavaScript is a multipurpose programming language. Lets cover the basics about what JavaScript is and what it can do for you. Ads by Google Read first: What is JavaScript?
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