giuseppeg
RFC: Support slot attributes and data cascade
⚠️ this feature is related to the Collections proposal and probably should be implemented before #17.
slot attributes
Currently xm support only element slots:
<slot name="title"></slot>
We should add support for slot attributes:
<a slot:href="https://{domain}/contact">contact me</a>
These will be filled with fill elements eg:
<fill name="domain">acme.com</fill>
spec
Any attribute can be slotted if prefixed with slot:. Within the value for the attribute there can be multiple expressions delimited with { and }. The expression name matches a fill name, and xm replaces the expression with the fill value.
Data Cascade
xm should allow to define multiple sources for data, including a global data object that is provided via config file.
We need to rework the main plugin to merge the data correctly using a Data Cascade mechanism similar to the 11ty's one. Check out https://www.11ty.dev/docs/data-cascade/
Additionally we need to provide a global xm:permalink fill value that contains the absolute path for the file so that people can use it to reference to the current page (eg. when creating sharing links). The xm: namespace will be reserved for xm fill values.
