index.js

import AOS from 'aos';
import 'aos/dist/aos.css';

import L from 'leaflet';
import 'leaflet/dist/leaflet.css';

AOS.init({
  // Global settings:
  disable: false, // accepts following values: 'phone', 'tablet', 'mobile', boolean, expression or function
  startEvent: 'DOMContentLoaded', // name of the event dispatched on the document, that AOS should initialize on
  initClassName: 'aos-init', // class applied after initialization
  animatedClassName: 'aos-animate', // class applied on animation
  useClassNames: false, // if true, will add content of `data-aos` as classes on scroll
  disableMutationObserver: false, // disables automatic mutations' detections (advanced)
  debounceDelay: 50, // the delay on debounce used while resizing window (advanced)
  throttleDelay: 99, // the delay on throttle used while scrolling the page (advanced)

  // Settings that can be overridden on per-element basis, by `data-aos-*` attributes:
  offset: 120, // offset (in px) from the original trigger point
  delay: 50, // values from 0 to 3000, with step 50ms
  duration: 400, // values from 0 to 3000, with step 50ms
  easing: 'ease', // default easing for AOS animations
  once: true, // whether animation should happen only once - while scrolling down
  mirror: false, // whether elements should animate out while scrolling past them
  anchorPlacement: 'top-bottom', // defines which position of the element regarding to window should trigger the animation
});

var mymap = L.map('mapid').setView([51.404, -0.09], 13);

L.tileLayer(
  'https://api.mapbox.com/styles/v1/{id}/tiles/{z}/{x}/{y}?access_token={accessToken}',
  {
    maxZoom: 15,
    id: 'mapbox/streets-v11',
    tileSize: 512,
    zoomOffset: -1,
    accessToken:
      'pk.eyJ1IjoibWFudTEyMzQ1Njc4OSIsImEiOiJja29tajdwMzQwZHRiMzFsNjRiNW9zdG1qIn0.3epHzR4kLOhVoS3ejiItbg',
  }
).addTo(mymap);