[update] setValue() and getFilter() methods of the grid header filter

Author: mafanya23

docs/grid/api/grid_getheaderfilter_method.md

@@ -16,11 +16,11 @@ description: You can explore the getHeaderFilter method of Grid in the documenta
 @returns:
 An object with a set of methods which let you work with the header filter of the specified column. The methods are:
 
-- [blur()](grid/api/headerfilter/blur_method.md) - removes focus from the filter
-- [clear()](grid/api/headerfilter/clear_method.md) - clears the value set in the filter
-- [focus()](grid/api/headerfilter/focus_method.md) - sets focus on the filter
-- [getFilter()](grid/api/headerfilter/getfilter_method.md) - returns either an HTML object or an object with Combobox configuration
-- [setValue()](grid/api/headerfilter/setvalue_method.md) - sets a value by which a column will be filtered
+- [`blur()`](grid/api/headerfilter/blur_method.md) - removes focus from the filter
+- [`clear()`](grid/api/headerfilter/clear_method.md) - clears the value set in the filter
+- [`focus()`](grid/api/headerfilter/focus_method.md) - sets focus on the filter
+- [`getFilter()`](grid/api/headerfilter/getfilter_method.md) - returns either an HTML object, or an object with Combobox/Calendar configuration
+- [`setValue()`](grid/api/headerfilter/setvalue_method.md) - sets the filter value
 
 @example:
 const countryFilter = grid.getHeaderFilter("country");

docs/grid/api/headerfilter/getfilter_method.md

@@ -6,25 +6,24 @@ description: You can explore the getFilter method of the header filter of Grid i
 
 # getFilter()
 
-@short: returns either an HTML object or an object with Combobox configuration
+@short: returns either an HTML object, or an object with Combobox/Calendar configuration
 
-@signature: {'getFilter(): HTML object | Combobox;'}
+@signature: {'getFilter(): VNode | Combobox | Calendar;'}
 
 @returns:
-Either an HTML object or an object with Combobox configuration
+Either an HTML object, or an object with Combobox/Calendar configuration
 
 @example:
 const filter1 = grid.getHeaderFilter("country").getFilter();
 console.log(filter1);
 // -> returns Combobox
-//  {config: {…}, _uid: 'u1670500020936', events: o, data: d, popup: f, …}
-
+// { config: {...}, _uid: 'u1670500020936', events: o, data: d, popup: f, ... }
 
 const filter2 = grid.getHeaderFilter("netChange").getFilter();
 console.log(filter2);
 // -> returns an HTML object
-// {type: 1, attrs: {…}, tag: 'div', _class: 'dhx_grid-filter__label dxi dxi-magnify', 
-// ref: 'netChange_filter', …}
+// { type: 1, attrs: {...}, tag: 'div', _class: 'dhx_grid-filter__label dxi dxi-magnify', ref: 'netChange_filter', ... }
 
 @changelog:
-added in v8.0
+- The method may return an object with Calendar configuration since v9.3
+- Added in v8.0

docs/grid/api/headerfilter/setvalue_method.md

@@ -10,19 +10,41 @@ description: You can explore the setValue method of the header filter of Grid in
 
 @signature: {'setValue(value: string | string[] | Date | Date[]): void;'}
 
-@params:
-- `value: string | string[] | Date | Date[]` - the value to be set for the filter
+@descr:
+#### Usage
 
-:::info
-- An array of string values can be specified only for [`comboFilter`](/grid/configuration/#customizing-headerfooter-filters) in the `multiselection:true` mode.
+- for inputFilter, selectFilter, comboFilter
 
-- For [`dateFilter`](/grid/configuration/#customizing-headerfooter-filters), the value must be passed strictly as a *Date* object (for a single selection) or an array of *Date[]* objects (for the `range` mode). *String* values are not supported by the `setValue()` method for this filter type.
-:::
+~~~jsx
+setValue(value: string): void; 
+~~~
+
+- for comboFilter
+
+~~~jsx
+setValue(value: string | string[]): void;
+~~~
+
+- for dateFilter
+
+~~~jsx
+setValue(value: Date | Date[]): void; 
+~~~
+
+@params:
+- `value: string | string[] | Date | Date[]` - the value to be set for the filter
 
 @example:
 grid.getHeaderFilter("country").setValue("Brazil");
 
 @descr:
+:::info
+The [`dateFilter`](/grid/configuration/#headerfooter-filters) type of filter supports only the *Date object* values.
+:::
+
+Note that in case of the enabled `multiselection` or `range` modes, the method awaits the value to be passed as an array.
+
+**Related article**: [Header/footer filters](/grid/configuration/#headerfooter-filters)
 
 @changelog: