It's about this API:

fun ComposeViewport(
    viewportContainerId: String? = null,
    configure: ComposeViewportConfiguration.() -> Unit = {},
    content: @Composable () -> Unit = { }
)

Previously, they were not common - it was not possible to call this API from a shared webMain-like source set.

One of the overloads has no w3c types, and therefore it can be web-common for free.

Also, updated our demo: fun main is common now.

Required for https://youtrack.jetbrains.com/issue/CMP-7674

Testing

This should be tested by QA

Release Notes

Migration Notes - Web

• fun ComposeViewport with viewportContainerId: String? parameter now can be called from a web-common fun main (k/js and k/wasm)