A final consideration for keyboard users is the Select All action.
If you have a large list of items of selectable items,
many of your keyboard users will expect that they can use
Control+A to select all the items.

Touch devices

On touch devices, multi-selection is typically simplified,
with the expected behavior being similar to having the
isMultiSelectModifier down on the desktop.
You can select or deselect items using a single tap,
and will usually have a button to Select All or
Clear the current selection.

How you handle multi-selection on different devices depends
on your specific use cases, but the important thing is to
make sure that you’re offering each platform the best
interaction model possible.

Selectable text

A common expectation on the web (and to a lesser extent desktop)
is that most visible text can be selected with the mouse cursor.
When text is not selectable,
users on the web tend to have an adverse reaction.