@benev/slate/x/tools/clone/clone.js

frontend web stuff

export function clone(data, refs = new Set()) {
    if (refs.has(data))
        throw new Error("cannot clone circular reference");
    let copy = undefined;
    if (typeof data === "function" || (data !== null && typeof data === "object")) {
        refs.add(data);
        if (Array.isArray(data))
            copy = data.map(d => clone(d, new Set(refs)));
        else if (data.constructor === Object)
            copy = Object.fromEntries(Object.entries(data)
                .map(([key, d]) => [key, clone(d, new Set(refs))]));
        else if (data instanceof Map)
            copy = new Map(Array.from(data, ([key, val]) => [key, clone(val, new Set(refs))]));
        else if (data instanceof Set)
            copy = new Set(Array.from(data, val => clone(val, new Set(refs))));
        else if (data instanceof Date)
            copy = new Date(data.getTime());
        else
            copy = data;
        refs.delete(data); // Remove current data from refs once we're done with this branch of the object tree
    }
    else
        copy = data;
    return copy;
}
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