Customize Node Caption

I need to customize the caption of a node, which should be the first element of a list and the list is from a property of the node. The function I write is to pass a node and return the element.

function getNodeCaption(node){ 
    const names = node["Name"]; 
    // console.log("names type",typeof(names)) 
    return names[0];
}

And I set the caption of the node label to be caption: getNodeCaption in the config. When I print the type of the list, I get undefined. I wonder whether there is an example showing how to use a function to customize node caption. Thank you.

[SandyLuXY]

Success! Thank you so much 😃

[SandyLuXY]

node is an object, Name is a key of the object. node["Name"] is the values in the object whose keys are "Name".