Upgrading from 1.x

Adding the code template made two small breaking changes.

Template.render may return a promise

render now returns string | Promise<string>, and buildSvg is async.

A custom template that returns a string still works unchanged. What needs updating is any direct call site of buildSvg, which now needs an await.

renderMetaImages and generate were already async, so nothing changes for code that uses those.

MetaImageProps.title is optional

title is no longer required, and walkContent and extractProps no longer skip a file that declares props without one.

This is what lets a code post describe its image entirely through code and language, with no heading above the panel.

If your project relied on a titleless props block being ignored, those posts will now get images. Return undefined from a props mapper to filter them out instead.