JavaScript（discord.js）TypeError：无法读取未定义的属性“startsWith”

Question

When i was compiling the source code of my Discord bot, i get this:

TypeError: Cannot read property 'startsWith' of undefined

This is the code:

const { PREFIX } = require("../config.json");

module.exports = (client, aliases, callBack) => {

if (typeof aliases === "string")

{
    aliases = [aliases];
}

client.on("message", message => {
    const { CONTENT } = message;

    aliases.forEach(alias => {
        const COMMAND = ${PREFIX}${alias};

        if (CONTENT.startsWith(`${COMMAND}`) || CONTENT === COMMAND)
        {
            console.log(Asuna is running the command "${COMMAND}"...);

            callBack(message);
        }
    });
});

}

Answer 1

I think you're not getting the actual message content from the message's object (Therefore it is undefined ).You could try to just set the message content to a constant.

const msg = message.content;

Then just use msg in your code.

if (msg.startsWith(`${COMMAND}`) || msg === COMMAND)