Is this works with Angular 5? Please help

[phanikumarballa]

Is this works with Angular 5? Please help. Am getting below error in Angular 5:
ERROR TypeError: Cannot read property 'stopRecording' of undefined
at HomeComponent.push../src/app/components/home/home.component.ts.HomeComponent.stopRecording (home.component.ts:82)
at Object.eval [as handleEvent] (HomeComponent.html:33)
at handleEvent (core.js:11107)
at callWithDebugContext (core.js:12204)
at Object.debugHandleEvent [as handleEvent] (core.js:11907)
at dispatchEvent (core.js:8561)
at core.js:9005
at HTMLButtonElement. (platform-browser.js:1215)