OpenLayers v4.0.1 API - Class: IsNull

# Class: IsNull

This documentation is for OpenLayers v4.0.1. The latest is v.

## ol.format.filter.IsNull

Represents a `<PropertyIsNull>` comparison operator.

#### new ol.format.filter.IsNull(propertyName)

src/ol/format/filter/isnull.js, line 16

  Name | Type | Description
  --- | --- | ---
  `propertyName` | string | Name of the context property to compare.

### Extends

- ol.format.filter.Comparison