Receiving error message when initialising JavaScript function

Question

So below is my javascript code. It's wrapped in module.exports, but that's not the error.

 parseMention = (arg, asId = false) => {
    if(!arg.startsWith('<@') && arg.endsWith('>')) return undefined
    let id = arg.slice(2, -1)
    if(id.startsWith('!')) id.slice(1)
    if(asId === true) return id
    if(asId === false) return bot.users.cache.get(id)
}

despite it seeming correct to me, I get the following error message:

SyntaxError: Invalid shorthand property initializer

Any help would be much appreciated

Answer 1

It's wrapped in module.exports, but that's not the error.

I'm pretty sure there is the error.

This part of your code won't throw a SyntaxError: Invalid shorthand property initializer error. It would be great to see your module.exports , but it's 99.9% that you're trying to export an object like this and the = after parseMention is an invalid shorthand property initialiser:

// This is invalid syntax
module.exports = {
  parseMention = (arg, asId = false) => {
    if (!arg.startsWith('<@') && arg.endsWith('>')) return undefined;
    let id = arg.slice(2, -1);
    if (id.startsWith('!')) id.slice(1);
    if (asId === true) return id;
    if (asId === false) return bot.users.cache.get(id);
  }
}

This should work:

module.exports = {
  parseMention(arg, asId = false) {
    if (!arg.startsWith('<@') && arg.endsWith('>')) return undefined;
    let id = arg.slice(2, -1);
    // it won't do anything, slice won't mutate id and you don't return
    if (id.startsWith('!')) id.slice(1);
    if (asId === true) return id;
    if (asId === false) return bot.users.cache.get(id);
  },
};