NGWS SDK Documentation  

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10.6.1 Static properties

When a property declaration includes a static modifier, the property is said to be a static property. When no static modifier is present, the property is said to be an instance property.

A static property is not associated with a specific instance, and it is an error to refer to this in the accessors of a static property. It is furthermore an error to include a virtual, abstract, or override modifier on an accessor of a static property.

An instance property is associated with a given instance of a class, and this instance can be accessed as this (§7.5.7) in the accessors of the property.

When a property is referenced in a member-access (§7.5.4) of the form E.M, if M is a static property, E must denote a type, and if M is an instance property, E must denote an instance.

The differences between static and instance members are further discussed in §10.2.5.