To create EJ RTE component we must use the <textarea>. Div is not a valid tag for creating EJ RTE component. The Angular directive to create the RTE component is ej-rte. You can refer the following help link to know more about the Angular support of EJ components
For getting started and to know about the important features in any particular component, go to the help link and click on the particular component. For example, getting started and key features in Grid can be found in
Is still you face any difficulties please get back to us with additional information about the issue or revert back the sample link to showcase the issue along with the replication procedure, which would be helpful for us to provide a better solution at the earliest.