changeDisplayOfRect.js

document.addEventListener("DOMContentLoaded", function(e) {
    slider.noUiSlider.on("update", function(values, handle) {
        const allBuilding = [...document.querySelectorAll(".city-dot")];

        allBuilding.map(i => {
            i.style.display = "block";
        });

        [...range(1930, values[0]), ...range(values[1], 2019)].map(i => {
            allBuilding.map(l => {
                if (l.classList.contains(`${i}-jahr`)) {
                    l.style.display = "none";
                }
            });
        });
    });
});