svg-path-functions.js

const curve = (start, control1, control2, end) => {
  return [
    "M",
    start.join(" "),
    "C",
    control1.join(" "),
    control2.join(" "),
    end.join(" ")
  ].join(" ");
}

const line = (start, end) => {
  return ["M", start.join(" "), "L", end.join(" ")].join(" ");
}