Function beforeApply

JMap.Event.MapContext.on.beforeApply

This event is triggered before the map context is applied.

You can access extension's data from this event, see example below.

Example

// Triggered before a map-context is applied
JMap.Event.MapContext.on.beforeApply("my-before-apply-listener", params => {
  console.info(`Before apply map context id="${params.context.title}"`, params.context)
  const isExtensionDataSet = params.isExtensionDataSetById("my-extension")
  if (!isExtensionDataSet) {
    console.info("No extension data in map-context")
  } else {
    console.info("Extension map context data = ", params.getExtensionDataById("my-extension"))
  }
})
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