Scope in JavaScript refers to context (or portion) of the code which determines the accessibility (visibility) of variables. In JavaScript, we have two types of scope, local , and global .

Functions are self-contained routines that can be “called” elsewhere within your JavaScript code. Along with loops and conditionals, functions are an essential means of organizing software.

Within the JavaScript function you can treat the element as an HtmlElement and access its properties. As an example, this JavaScript code sets the textbox's value property to "Vogel": function SetName ...