This is a problem with the documentation page, but not a bug in Angular. What's happening:
- The default documents show the API for the current main branch (also called snapshot)
- inline plnkrs also use Angular inline files from the main branch
- automatically created plnkrs revert to the latest stable version (in this case 1.5.8), which does not yet support the delimiter.
So you have to wait 1.5.10 to use this function.
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