Can we store metadata on every words and let user modify it and still keep it?

1

Hi, I’m new to ProseMirror and I’m developing annotation tool for speech-to-text.

I have used draftjs. I use entity and decorator to store and manage metadata on each words. every single words are entities and each entity has timestamp as metadata.

example: I have a cat

" I ", " have ", " a ", " cat " are entities.

entity data of cat is like

offset: 12,
length: 5,
data: {
 original_word: 'cat',
 start: 4.2,
 end: 4,6,
}

So when user select a word and modify the word cat into kitten, I can still get start and end timestamps.

Do you think I can develop similar thing with ProseMirror?

It’s okay for metadata to break when user delete multiple words at a time… No need to be perfect because I need to migrate to some editor library from draftjs anyway sooner or later…

Thanks in advance.

2

Yes, this is possible. Document positions can be ‘mapped’ for changes to the document to find the new corresponding position, and you could keep your annotations either in a custom data structure that updates them on each transaction, or in a decoration set, which comes with an efficient method to map all the ranges inside it.

3

Thank you so much. I’ll try decoration set.