Listening to Anchor Events and Saving Changes in Svelvet

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Hello everyone,

I've just started working with Svelvet / Svelte, and I have a few small questions that I don't quite understand. I would really appreciate any help you can provide.

1. I don't know how to listen to anchor events. I've gone through some of the documentation, but I couldn't find any information on this. For example, there's already a "nodeClicked" event defined for nodes, and I can track when a node is clicked and get the corresponding node's ID. But how can I track when an anchor element is clicked? How can I get its ID?

2. I've made some changes to a model I've created on a localhost via Svelvet, such as adding new nodes and creating edge connections. However, when I refresh the page, all these changes are lost, and I have to start from scratch. How can I save the changes I've made with Svelvet? I want the most recent changes to always be up-to-date, for example, when I press the "save" button, it should store everything. I thought about using LocalStorage, but unfortunately, I noticed some errors occur when saving arrays.

I'm open to any support you can provide on these issues, and I thank you in advance for your help.