discord.js/docs/general/faq.md

Frequently Asked Questions

These questions are some of the most frequently asked.

No matter what, I get SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode‽

Update to Node.js 12.0.0 or newer.

How do I get voice working?

• Install FFMPEG.
• Install either the @discordjs/opus package or the opusscript package. @discordjs/opus is greatly preferred, due to it having significantly better performance.

How do I install FFMPEG?

• npm: npm install ffmpeg-static
• Ubuntu 16.04: sudo apt install ffmpeg
• Ubuntu 14.04: sudo apt-get install libav-tools
• Windows: npm install ffmpeg-static or see the FFMPEG section of AoDude's guide.

How do I set up @discordjs/opus?

• Ubuntu: Simply run npm install @discordjs/opus, and it's done. Congrats!
• Windows: Run npm install --global --production windows-build-tools in an admin command prompt or PowerShell. Then, running npm install @discordjs/opus in your bot's directory should successfully build it. Woo!

Other questions can be found at the official Discord.js guide If you have issues not listed here or on the guide, feel free to ask in the official Discord.js server. Always make sure to read the documentation.