SPFX Field Customizer: how to get Id of item in list?

Question

My question relates to SPFX Field Customizer: how to get full path of document in document library?.

How to I get the Id of the item on which the Field Customizer applies?

I have tried:

event.listItem.getValueByName("Id")
event.listItem.getValueByName("ID")
event.listItem.getValueByName(".Id")
event.listItem.getValueByName(".ID")

When Inspect the object I do not see the ID in the array:

I can however see the Id here:

Worst case, I suppose, is to get value from event.listItem["_values"] like this but it is really dirty

// This doesnt' work
let listItemId = event.listItem["_values"].find(item => item.key === "ID");  
// This works  
event.listItem["_values"].forEach((value: string, key: string) => {
console.log(key, value);
});

Answer 1

From the screentshot, the event.listItem["_values"] is a Map object, so you could get the ID like this:

let itemId=event.listItem["_values"].get("ID")