Drop-down

Should dropdowns hug its contents or should they be fixed?

Should dropdowns hug its contents or should they be fixed?
  1. When would you use a drop-down field?
  2. How many types of drop-down are there?

When would you use a drop-down field?

If there are many more than 10 options, and the optional input either has to be submitted in a known and structured format for validation and analysis, or where users don't know their options upfront (hence, can't type it), a drop-down can be a completely warranted choice.

How many types of drop-down are there?

I also want to clarify that there are two main types of dropdowns: those used for navigation and those used in forms.

Experience using dropdowns within a sentence - examples and experiences [closed]
What is drop-down list example?What are Dropdowns used for?What are drop-down questions?How many types of dropdowns are there? What is drop-down lis...
Recording video is there an accessibility/usability/other reason for allowing video recording without audio?
What is the importance of video recording?What is video recording meaning? What is the importance of video recording?With a video recording of the m...
IOS bar button - How do you place your only cancel (close) bar button?
What is the difference between cancel and close button?How do I get rid of the default back button in IOS?How do I hide the navigation bar button in ...