NDVI_parcel_statistics_evalscript.js

//VERSION=3
function setup() {
  return {
    input: [{
      bands: [
        "B04",
        "B08",
        "SCL",
        "dataMask"
      ]
    }],
    output: [
      {
        id: "data",
        bands: 3
      },
      {
        id: "dataMask",
        bands: 1
      }]
  };
}

function evaluatePixel(samples) {
    let index = (samples.B08 - samples.B04) / (samples.B08+samples.B04);
    return {
        data: [index, samples.B08, samples.B04],
        dataMask: [samples.dataMask],
    };
}