FilterExpression

Updated on May 12, 2026

Represents the FilterExpression interface.

Name	Type	Default	Description
editor	FilterEditor		Specifies the user-defined filter editor type that will be used. The available options are 'string', 'number', 'boolean', and 'date'.
editorFormat?	string | DateFormat | NumberFormat		Specifies the user-defined filter editor format that will be used. See the Filter editor formats documentation.
editorTemplate?	TemplateRef<any>		Specifies a template for the expression value editor input.
field	string		Specifies the field that will be used by the user-defined filter.
operators?	FilterOperator[]		Specifies the operators that will be available in the order of providing them. If no operators are provided, default operators are used for each filter type. The default string operators are: eq— Is equal to neq— Is not equal to isnull— Is null isnotnull— Is not null contains— Contains doesnotcontain— Does not contain startswith— Starts with endswith— Ends with isempty— Is empty isnotempty— Is not empty The default number and date operators are: eq— Is equals to neq— Is not equal to isnull— Is null isnotnull— Is not null gt— Greater than gte— Greater than or equal to lt— Less than lte— Less than or equal to The boolean operator is always set to eq.
operatorTemplate?	TemplateRef<any>		Specifies a custom template for the operator dropdown. When set, the default operator DropDownList is replaced with the provided template. The template receives the current FilterDescriptor as implicit context.
title?	string		Specifies the title text that will be displayed by the user-defined filter. If the title isn't set, the value passed to field is used.