time-slider-buildings.js

const start = new Date(1900, 0, 1);
const end = new Date(2020, 0, 1);

const timeSlider = new TimeSlider({
  container: "timeContainer",
  mode: "cumulative-from-start",
  fullTimeExtent: {
    start: start,
    end: end
  },
  values: [end],
  stops: {
    interval: {
      value: 5,
      unit: "years"
    },
    timeExtent: { start, end }
  }
});

timeSlider.watch("timeExtent", function (timeExtent) {
  const maxYear = timeExtent.end.getFullYear();
  layer.definitionExpression = `yrbuilt <= ${maxYear}`;
});