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OpenLayers 3 : Beginner's Guide by Erik Hazzard, Paul Spencer, Thomas Gratier

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Interactive styles

To round off our chapter on vector styles, let's explore combining vector styles with user interaction. In the previous chapter, we responded to the mouse moving over a country by displaying the country's name in an HTML element outside the map. We'll build on this example and take it one step further. As the mouse moves, we'll highlight the country under the mouse and draw its flag and name in the center of the country using a feature overlay. The feature overlays are something new; so, we'll need to learn something about them before we go ahead with our example though.

The feature overlays

The FeatureOverlay class, ol.FeatureOverlay, is a special type of vector layer designed to render a small number of temporary features in ...

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