https://ckeditor.com/docs/ckeditor5/latest/api/module_html-support_integrations_customelement.html
Module html-support/integrations/customelement | CKEditor 5 API docs
CKEditor 5 API Documentation. The Module html-support/integrations/customelement.
html support5 apimoduleintegrationscustomelement
https://www.mathworks.com/help/rptgen/ug/mlreportgen.dom.customelement-class.html
mlreportgen.dom.CustomElement - Custom element of document - MATLAB
Use an object of the mlreportgen.dom.CustomElement class to extend the DOM API.
custom elementdomcustomelementdocumentmatlab