svg path to polygon (doesn't support curve segments, only LlMmHhVvZz, assumes commands are space separated!)

README.md

const d =
  "M 12.773125,113.36602 221.3132,95.992053 l 12.11088,1.651482 10.58724,6.605925 7.48176,8.10713 2.84979,11.98594 -1.51508,13.41407 -4.62098,9.90131 -9.00254,8.33802 -9.58241,3.43426 -12.70975,0.58031 -203.961053,-17.77707 -5.9080342,-2.37991 -3.4503706,-4.50127 -1.9267305,-6.60592 1.1009889,-7.00904 3.5114276,-5.52164 z";
const p = svgDToPoly(d);

p would then be

[
  [233.42408, 97.643535],
  [244.01132, 104.24946],
  [251.49308000000002, 112.35659],
  [254.34287000000003, 124.34253],
  [252.82779000000002, 137.7566],
  [248.20681000000002, 147.65791],
  [239.20427, 155.99593],
  [229.62186, 159.43018999999998],
  [216.91210999999998, 160.01049999999998],
  [12.951056999999992, 142.23342999999997],
  [7.043022799999991, 139.85351999999997],
  [3.5926521999999914, 135.35224999999997],
  [1.6659216999999915, 128.74632999999997],
  [2.7669105999999912, 121.73728999999997],
  [6.278338199999991, 116.21564999999997],
  [233.42408, 97.643535]
]

Try it out here

flipper.svg

svgDToPoly.js

(function(global) {
  const supportedCommands = "MmlLHhVvZz".split("");
  const absoluteCommands = "MLHVZ".split("");
  const singleNumberCommands = "HhVv".split("");

  function contains(arr, el) {
    return arr.indexOf(el) !== -1;
  }

  function startsWithNumber(s) {
    return /^-?\d/.test(s);
  }

  function svgDToPoly(d) {
    const parts = d.split(" ");

    let p = [0, 0];
    let absolute = true;
    let volatile = false;

    const points = [];
    let part;
    let lastCommand;
    while ((part = parts.shift())) {
      if (contains(supportedCommands, part)) {
        absolute = contains(absoluteCommands, part);
        volatile = part === "m" || part === "M";
        lastCommand = part;

        if (part === "Z" || part === "z") {
          points.push([points[0][0], points[0][1]]);
        }
      } else if (startsWithNumber(part)) {
        const arr = part.split(",").map(parseFloat);
        if (contains(singleNumberCommands, part)) {
          const num = parseFloat(parts.shift());
          if (part === "H" || part === "h") {
            points.push([p[0], (part === "h" ? p[1] : num) + num]);
          } else if (part === "V" || part === "v") {
            points.push([(part === "v" ? p[0] : 0) + num, p[1]]);
          }
        }

        // MmLl
        if (absolute) {
          p = arr;
        } else {
          p = [p[0] + arr[0], p[1] + arr[1]];
        }

        if (!volatile) {
          points.push(p);
        }
      } else {
        throw part;
      }
    }
    return points;
  }

  global.svgDToPoly = svgDToPoly;
})(this);