How to insert text at cursor position using insertText in summernote Angular

I'm using Angular 8. I'm using text editor summernote. In summernote I have to insert text at particular cursor position,I have seen in https://summernote.org/deep-dive/ summernote documentation, but how to insert text from API to insert at particular cursor position. Here is my stackbiltz https://stackblitz.com/edit/angular-summernote-demo-xznhjq?file=src%2Fapp%2Fapp.component.html,src%2Fapp%2Fapp.component.ts