chatkit-multipart-message.js

await currentUser.sendMultipartMessage({
    roomId: myRoom.id,
    parts: [
    { type: "text/plain", content: "Hello world!" },
    {
        type: "image/gif",
        url: "https://gfycat.com/failingforkedheterodontosaurus",
    },
    {
        file: document.querySelector("#attach").files[0],
        customData: { metadata: 42 },
    }
    ],
});