"SyntaxError: missing : after property id" message in Acrobat Pro DC Javascript Debugger

[Imran25844166y4hb]

I am trying to run the following code in the JavaScript editor in Adobe Acrobat Pro DC.

const
    getPathes = ({ value = '', sub }) => sub
        ? Object
            .entries(sub)
            .flatMap(([k, v]) => getPathes(v).map(([p, s]) => [k + (p && '.') + p, value + (value && '') + s]))
        : [['', value]],
    input = [["1", "I can "], ["1.1", "speak "], ["1.1.1", "English."], ["1.1.2", "Chinese "], ["1.1.2.1", "well."], ["1.2", "eat noodles."], ["1.3", "play football."], ["2", "I "], ["2.1", "drink."], ["2.2", "sleep."], ["3", "I am the man."], ["4", "Hire me."]],
    tree = input.reduce((t, [path, value]) => {
        path.split('.').reduce((o, k) => (o.sub ??= {})[k] ??= {}, t).value = value;
        return t;
    }, {}),
    result = getPathes(tree);

console.log(result);

The problem is:

It runs flawlessly in JSFiddle. But shows a "SyntaxError: missing : after property id" message in Acrobat Pro DC.
What is going wrong here? How can I correct the syntax?

[Test Screen Name]

You seem to be using very modern JavaScript syntax not understood by Acrobat, based on an older JavaScript engine.