This allows Fields to have an optional prefix component which is placed inside
the border of the Field and to the left of the input. Since this label animation
would be complex to get right for this case, it is instead fixed to the top left
if there is a prefix component.
This canonical example of this today would be a phone number field which
includes a country dropdown.
By placing the Field's border on the Field component root instead of the input,
it's easier to wrap it around additional elements that we'll soon stuff inside
the field.
This adds a comment to explain the `max-width` and also fixes it actually use
the right value. (I had grabbed the wrong part of `margin` the first time.)
This avoids awkward wrapping if the label is longer than the input. This will
show an ellipsis to suggest there's more text in the label than can be shown.
When the `label` element is displayed on top of the input (`label` is set and
there is no `placeholder`), it would block clicks from reaching the input. This
allows them to get through, but then also restores `label`'s events once it
moves out of the way.
Fixes https://github.com/vector-im/riot-web/issues/8469
These icons are based on Feather as the original source, but they have various
tweaks applied, such as stroke width, color, etc. Hopefully the tweaked name
makes this more obvious in the future.
The label moves into the border on focus and after being filled. A valid color
is applied to the label and input border. Other states like invalid can be added
later as needed.
Adapted from @ara4n's experiment into a React component with a CSS only
approach.
