The ArcGIS API for JavaScript also provides Dojo widgets, commonly referred to as dijits. Many of these dijits offer a user interface (UI) with existing API modules working in the background. Using these dijits can cut development time by providing well-used and tested UI components. Dijit documentation also shows the CSS classes used to style the dijits, so that developers and designers can restyle them to fit the theme of the page. Let's take a look at the more commonly used dijits.
The Measurement dijit provides a tool that can be used to measure distances, areas, and perimeters of locations on the map. It can also get the latitude and longitude of points on the map. The dijit uses the drawing toolbar to draw shapes on the map. From there, it sends a request to a GeometryService. Once the dijit has retrieved its results, it either displays the latitude and longitude of a point, shows the length of the line drawn on the map, or displays the area and perimeter of the polygon...