Leaflet.FullScreen2

A super-simple Leaflet plugin to add fullscreen buttons to your maps, designed for Javascript bundlers, filled to the brim with Typescript typings to aid your development experience.

Introduction

This plugin uses the native Fullscreen API with the lovely help of screenfull.

Important considerations

Please note that iPhones do not support this API. This plugin will automatically fall back to using a pseudo-fullscreen system instead for iOS devices.

Also note that if you want to use the plugin on a map which embedded in an iframe, you must set the allowfullscreen attribute on your iframe.

Options

All options are explained in detail within the Typescript typings bundled with this package. Descriptions and further info can be found within your IDE if it supports Typescript and TSDoc.

Option	Default	Description
position	'topleft'	Where to render the control on the leaflet map.
title	'Enter fullscreen'	The title attribute for the fullscreen button when not in fullscreen mode.
titleCancel	'Exit fullscreen'	The title attribute for the fullscreen button when in fullscreen mode.
content	null	Override the content of the fullscreen button. Must be null (use an icon) or an HTML string.
forceSeparateButton	false	Force the fullscreen button to be rendered outside of the ZoomControls control.
forcePseudoFullscreen	false	Use pseudo-fullscreen even if the browser supports the Fullscreen API.
fullscreenElement	false	The element to make fullscreen when fullscreen is toggled. This is normally the map's container. (false automatically detects)

Usage

Adding at map creation

import "leaflet.fullscreen2";
import "leaflet.fullscreen2/leaflet.fullscreen2.css";

// ...

const map = L.map({
  fullScreenControl: true,
  fullScreenControlOptions: {
    position: "topleft",
    forceSeparateButton: true,
  },
});

Adding to an existing map

import "leaflet.fullscreen2";
import "leaflet.fullscreen2/leaflet.fullscreen2.css";

const map = L.map();

// ...

L.fullScreen({
  position: "topleft",
  forceSeparateButton: true,
}).addTo(map);

Map events & methods

// Create a map with a fullscreen button
const map = L.map({
  fullScreenControl: true,
});

// Events are fired when entering or exiting fullscreen
map.on("enterFullscreen", function () {
  console.log("entered fullscreen");
});

map.on("exitFullscreen", function () {
  console.log("exited fullscreen");
});

// You can also toggle fullscreen via a method on the map object
map.toggleFullScreen();

Usage with react-leaflet

I created this library mainly for use in my React website, alongside react-leaflet. A simple code snippet example can be seen below for how this can be integrated with react-leaflet.

import React, { useEffect } from "react";

import { MapContainer, useMap, useMapEvent } from "react-leaflet";

export function MyLeafletMap() {
  <MapContainer
    style={{
      height: "60vh",
    }}
    center={[51.505, -0.09]}
    zoom={13}
    attributionControl={false}
  >
    <FullscreenButton />
  </MapContainer>;
}

function FullscreenButton() {
  const map = useMap();

  useEffect(() => {
    // Only add the control if the map doesn't already have it
    //
    // This prevents issues where re-renders would cause duplication
    // of the fullscreen button.
    if (!map.fullScreenControl) {
      L.fullScreen({
        position: "topleft",
        title: "Enter fullscreen mode",
        titleCancel: "Exit fullscreen mode",
        forceSeparateButton: true,
      }).addTo(map);
    }
  });

  useMapEvent("enterFullscreen", () => {
    // You can also listen for the enter/exit fullscreen events
  });

  return null;
}