Custom Filter Error

[Bryan]

I am trying to create a custom filter for my radeditor and I keep receiving the following error message:

Javascript runtime error: Unable to get the property 'Filter' of undefined or null reference

The error occurs on this line of code

RadEditorCustomFilter.registerClass('RadEditorCustomFilter', Telerik.Web.UI.Editor.Filter);

[Ianko]

Hi Bryan,

Currently I could only make assumptions on the custom implementation of the used filter.

You could follow this online demo, in which the required steps to implement a custom content filter are described.

Additionally I could suggest checking:

• If the Enable property of the RadEditor control is set to false;
• If the name of the filter is the same as in all of the following declarations:
  • editor.get_filtersManager().add(new FiltersName());
  • FiltersName = function () { ... };
  • MyFilter.registerClass('FiltersName', Telerik.Web.UI.Editor.Filter);

If you are still having difficulties after reviewing the suggestions above, it would be helpful to get back to me with a simple locally runnable project, which isolates the problematic field, so that I could be able to investigate it and find its origin.

Regards,

Ianko
Telerik