pigeon-maps

Pigeon Maps - ReactJS maps without external dependencies

Demo: https://mariusandra.github.io/pigeon-maps/ (using maps from Wikimedia)

What is it?

Tired of waiting 5 seconds to include 200kb of gzipped Google Maps JavaScript code just to display a few tiles and a marker?

Welcome to the club!

This project aims to provide a performance-first React-centric extendable map engine.

We're currently at:

• ~20KB minified
• ~5KB gzipped

Implemented:

• Show tiles
• Arbitrary overlays (markers, etc)
• Move the map by dragging
• Move the map by touch on mobile
• Zooming with the scroll wheel
• Zooming by touch
• Fractional zooming (e.g. to level 12.2)
• Zoom without flickering (keep old tiles until new ones load)
• Smooth animated zooming
• Slide when dragging and letting go
• Event handling (clicks, etc)

Missing:

• Double click and double tap zooming

Code

See the demo for an example

import Map, { Overlay } from 'pigeon-maps'

const map = (
  <Map center={[50.879, 4.6997]} zoom={12} width={600} height={400}>
    <Overlay position={[50.879, 4.6997]} offset={[15, 31]}>
      <img src='[e-mail]' width={29} height={34} alt='' />
    </Overlay>
  </Map>
)

API

Map

center - Coordinates of the map center in the format [lat, lng]

zoom - Current zoom level 12

width - Width of the component in pixels. Must be set.

height - Height of the component in pixels. Must be set.

provider - Function that returns a TMS URL: (x, y, z) => url.

animate - Animations enabled, true.

attribution - What to show as an attribution. React node or false to hide.

attributionPrefix - Prefix before attribution. React node or false to hide.

onClick - When map is clicked `function ({ event, latLng, pixel })``

onBoundsChanged - When the bounds change, function ({ center, zoom, bounds }). Use this for a controlled component, then set center and zoom when it's called.

Overlays

<Map /> takes random React components as its children. The children may have these special props:

position - Coordinates of the element in the format [lat, lng]. These will be converted to pixels and passed as left and top to the child.

offset - Amount of pixels to subtract from the left and top props.

The children get passed these special props:

left - Pixels from the left of the map, calculated from position and offset

top - Pixels from the top of the map, calculated from position and offset

latLngToPixel - A helper function (latLng, center, zoom) that returns the position in pixels [x, y] for any [lat, lng]. The last 2 arguments are optional.

pixelToLatLng - A helper function (pixel, center, zoom) that converts any pixel coordinates [x, y] to [lat, lng]. The last 2 arguments are optional.

Use these two functions to create beautiful widgets. See the example marker component.

Alternatively use the <Overlay /> component. It accepts position, offset and classNames as its props and positions itself accordingly.

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Pigeon image by Robert Claypool