These few months, I am working on a project which is using Angular Material Framework. Its functions are very rich. It makes UI very nice. But you need to have a very tiny html template. I found my Radio Button is not working. You cannot select the values. After several trial and error, I found the mistakes I did is placing mat-radio-group elements in a mat-form-field element. Even the page is still rendering the nice UI, but the functions are not working. The solution is simple, I just need to change mat-form-field to a div!