FilterDescriptor

A basic filter expression. Usually a part of CompositeFilterDescriptor.

For more information, refer to the filterBy method.

field? string | Function

The field of the data item to which the filter operator is applied.

ignoreCase? boolean

Determines if the string comparison is case-insensitive.

operator string | Function

The filter operator (comparison).

The supported operators are:

• "eq" (equal to)
• "neq" (not equal to)
• "isnull" (is equal to null)
• "isnotnull" (is not equal to null)
• "lt" (less than)
• "lte" (less than or equal to)
• "gt" (greater than)
• "gte" (greater than or equal to)

The following operators are supported for string fields only:

• "startswith"
• "endswith"
• "contains"
• "doesnotcontain"
• "isempty"
• "isnotempty"

value? any

The value to which the field is compared. Has to be of the same type as the field.