How do I implement the sticky feature on the dropdownlist component? When browsing files on a code editor like Vscode, browsing deep level files, he pastes the parent file to the top. (I translated it from Chinese to English, please see the picture if you don't understand, thank you)
Implement sticky functions similar to those in the picture
/Users/like/code/Angular/angular-kendo/node_modules/@angular-devkit/architect/node/jobs/job-registry.js