Option to Enable input field only if a checkbox is checked

**- Do you want to request a *feature* or report a *bug*?**
Feature

**- What is the expected behavior?**
I will start with an example so that this is better understood

**whitelist:
status: false
type:
start-date:
end-date:**

In the code above, I want the user to only fill in the type and date fields if they change the status to true, So what i am looking for is a way to set a checkbox widget that controls input fields and makes them available when clicked on.

Another example would be a typical 'Others' Input box that becomes available when the user checks the 'others' checkbox.