multi-data
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    multi-data

    Create multipart form data

    import MultiData from "multi-data";

    const formData = new MultiData("boundary-1234-abcd");
    formData.append("data1", JSON.stringify({ data1: true }), {
    headers: { "Content-ID": 1 },
    });
    formData.append("data2", JSON.stringify({ data2: true }), {
    headers: { "Content-ID": 2 },
    });

    const res = await fetch("https://somewhere.com/batch", {
    method: "POST",
    headers: {
    "Content-Type": `multipart/mixed; boundary=${formData.boundary}`,
    },
    data: formData.toString(),
    });

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