Configuring layer options

Let's take a look at a couple of the layer's options argument we passed in during the previous example.

Tip

Pay close attention to the commas. Both arguments and key:value pairs are separated by a comma, but make sure you do not have a comma after the last pair. Trailing commas will usually break your map and are usually a pain to debug—so if your map isn't working and you don't see any helpful error messages in Firebug, check for trailing commas. A great site to help with your code is http://jslint.com.

wms_state_lines layer options

This layer's options are:

{ displayInLayerSwitcher: false, minScale: 13841995.078125}

The first property, displayInLayerSwitcher , can be either true or false, and determines if the layer will appear in the layer switcher control (if there is a layer switcher control). In our example, we do have a layer switcher control and you'll notice that we don't see it in the list of layers. The layer is still there, and we can programmatically turn...