Forms are nothing new to you, since they are built using HTML. However, not all forms are the same, especially when a JavaScript developer creates the form. JavaScript can make a form come alive, letting it interact dynamically with form elements while information is being entered into the form.
You experience this whenever the browser automatically changes settings on the form based on your selection from a drop-down list. Behind the scenes, the browser calls a JavaScript when the drop-down list selection changes. The JavaScript reads the selection and determines the settings for the other form elements. You’ll learn how to perform this and other feats of JavaScript magic in this chapter.
Does a JavaScript used like that with an indefinite article mean that it is just a snippet of JavaScript code?