Polymorphic components
What is a polymorphic component
A polymorphic component is a component which root element can be changed with component
prop.
All polymorphic components have a default element which is used when component
prop is not provided.
For example, the Button component default element is button
and
it can be changed to a
or any other element or component:
Polymorphic components as other React components
You can pass any other React component to component
prop.
For example, you can pass Link
component from react-router-dom
:
Polymorphic components as Next.js Link
Next.js link does not work in the same way as other similar components in all Next.js versions.
With Next.js 12 and below:
With Next.js 13 and above:
Wrapping polymorphic components
Non-polymorphic components include React.ComponentPropsWithoutRef<'x'>
as a part of their props type,
where x
is a root element of the component. For example, Container component
is not polymorphic – its root element is always div
, so its props type includes React.ComponentPropsWithoutRef<'div'>
.
Polymorphic components do not include React.ComponentPropsWithoutRef<'x'>
as a part of their props type
because their root element can be changed, and thus props type can be inferred only after the component was rendered.
Example of creating a non-polymorphic wrapper component for Mantine polymorphic component:
Example of creating a polymorphic wrapper component for Mantine polymorphic component:
Dynamic component prop
You can use dynamic value in the component
prop, but in this case, you need to either provide types manually
or disable type checking by passing any
as a type argument to the polymorphic component:
Create your own polymorphic components
Use createPolymorphicComponent
function and Box component to create new polymorphic components:
Make Mantine component polymorphic
Polymorphic components have performance overhead for tsserver (no impact on runtime performance),
because of that not all Mantine components have polymorphic types, but all components still
accept component
prop – root element can be changed.
To make Mantine component polymorphic, use createPolymorphicComponent
function the same way
as in the previous example: