kortjs

v0.2.1

Published

3 years ago

The 4KB slippy map

Downloads

0High
0Medium
0Low

dlfdk

map web component slippy map tile map

:world_map: Kortjs

A minimal slippy map as a web component

:link:Visit the demo-site

Key features

Less than 4kB in a single Javascript file with zero dependencies.
Image fetching and decoding in a worker ensures good performance and a responsive interface even on lower end devices.
Customization through attributes and slotted elements without extra JavaScript.

The first version (0.1.0) focused on a location-picker use case. See specifics below.

:sparkler: Getting started

Include the script in your html:

<script defer type="module" src="https://unpkg.com/kortjs@latest/web-component/dist/kortjs.min.js"></script>

Add the markup:

<kort-js data-url="https://tile.openstreetmap.org/${z}/${x}/${y}.png">
    <p slot="attribution-text">© <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors</p>
</kort-js>

That's it - you got a working slippy map!

Also available on npm:

npm install kortjs

:gear: Customization

The slippy map is customized with data-attributes and the <slot> element - no Javascript needed!

Tile provider

A tile provider is specified using the following attributes:

data-url (required)
data-id (optional)
data-token (optional)
data-tilesize (optional, default 256)
data-maxzoom (optional, default 19)
data-minzoom (optional, default 0)

The URL must use ${x}, ${y} and ${z} as placeholders for tile numbers and zoom level.

Placeholders for the token (API key) and id are ${token} and ${id} respectively.

Should your chosen tile provider deviate from the defaults provided by Kortjs as listed, the attributes data-tilesize, data-maxzoomand data-minzoom must be set accordingly. data-maxzoomand data-minzoom can also be used to limit zoom levels regardless of tile provider capabilities.

The data-id can be used to provide an additional parameter, e.g. map style.

<kort-js 
    data-url="https://api.mapbox.com/styles/v1/mapbox/${id}/tiles/${z}/${x}/${y}?${token}"
    data-id="light-v10"
    data-token="YOUR_ACCESS_TOKEN"
    data-tilesize="512"
    data-maxzoom="22"
    data-set-latitude="40.712778" 
    data-set-longitude="-74.006111" 
    data-set-zoom="10">
    <p slot="attribution-text">© <a href="https://www.mapbox.com/about/maps/">Mapbox</a> © <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a> <strong><a href="https://www.mapbox.com/map-feedback/" target="_blank">Improve this map</a></strong></p>
    <div slot="attribution-icon"></div>
</kort-js>

div[slot="attribution-icon"] {
    position: absolute;
    height: 20px;
    width: 65px;
    left: 10px;
    bottom: 10px;
    text-indent: -9999px;
    background-image: url(data:image/svg+xml;base64,<?xml version="1.0" encoding="utf-8"?><svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 80.47 20.02" style="enable-background:new 0 0 80.47 20.02;" xml:space="preserve"><style type="text/css">.st0{opacity:0.6;fill:#FFFFFF;enable-background:new    ;}.st1{opacity:0.6;enable-background:new    ;}</style><g><path class="st0" d="M79.29,13.61c0,0.11-0.09,0.2-0.2,0.2h-1.53c-0.12,0-0.23-0.06-0.29-0.16l-1.37-2.28l-1.37,2.28c-0.06,0.1-0.17,0.16-0.29,0.16h-1.53c-0.04,0-0.08-0.01-0.11-0.03c-0.09-0.06-0.12-0.18-0.06-0.27c0,0,0,0,0,0l2.31-3.5l-2.28-3.47c-0.02-0.03-0.03-0.07-0.03-0.11c0-0.11,0.09-0.2,0.2-0.2h1.53c0.12,0,0.23,0.06,0.29,0.16l1.34,2.25l1.33-2.24c0.06-0.1,0.17-0.16,0.29-0.16h1.53c0.04,0,0.08,0.01,0.11,0.03c0.09,0.06,0.12,0.18,0.06,0.27c0,0,0,0,0,0L76.96,10l2.31,3.5C79.28,13.53,79.29,13.57,79.29,13.61z"/><path class="st0" d="M63.09,9.16c-0.37-1.79-1.87-3.12-3.66-3.12c-0.98,0-1.93,0.4-2.6,1.12V3.37c0-0.12-0.1-0.22-0.22-0.22h-1.33c-0.12,0-0.22,0.1-0.22,0.22v10.21c0,0.12,0.1,0.22,0.22,0.22h1.33c0.12,0,0.22-0.1,0.22-0.22v-0.7c0.68,0.71,1.62,1.12,2.6,1.12c1.79,0,3.29-1.34,3.66-3.13C63.21,10.3,63.21,9.72,63.09,9.16L63.09,9.16z M59.12,12.41c-1.26,0-2.28-1.06-2.3-2.36V9.99c0.02-1.31,1.04-2.36,2.3-2.36s2.3,1.07,2.3,2.39S60.39,12.41,59.12,12.41z"/><path class="st0" d="M68.26,6.04c-1.89-0.01-3.54,1.29-3.96,3.13c-0.12,0.56-0.12,1.13,0,1.69c0.42,1.85,2.07,3.16,3.97,3.14c2.24,0,4.06-1.78,4.06-3.99S70.51,6.04,68.26,6.04z M68.24,12.42c-1.27,0-2.3-1.07-2.3-2.39s1.03-2.4,2.3-2.4s2.3,1.07,2.3,2.39S69.51,12.41,68.24,12.42L68.24,12.42z"/><path class="st1" d="M59.12,7.63c-1.26,0-2.28,1.06-2.3,2.36v0.06c0.02,1.31,1.04,2.36,2.3,2.36s2.3-1.07,2.3-2.39S60.39,7.63,59.12,7.63z M59.12,11.23c-0.6,0-1.09-0.53-1.11-1.19V10c0.01-0.66,0.51-1.19,1.11-1.19s1.11,0.54,1.11,1.21S59.74,11.23,59.12,11.23z"/><path class="st1" d="M68.24,7.63c-1.27,0-2.3,1.07-2.3,2.39s1.03,2.39,2.3,2.39s2.3-1.07,2.3-2.39S69.51,7.63,68.24,7.63z M68.24,11.23c-0.61,0-1.11-0.54-1.11-1.21s0.5-1.2,1.11-1.2s1.11,0.54,1.11,1.21S68.85,11.23,68.24,11.23z"/><path class="st0" d="M43.56,6.24h-1.33c-0.12,0-0.22,0.1-0.22,0.22v0.7c-0.68-0.71-1.62-1.12-2.6-1.12c-2.07,0-3.75,1.78-3.75,3.99s1.69,3.99,3.75,3.99c0.99,0,1.93-0.41,2.6-1.13v0.7c0,0.12,0.1,0.22,0.22,0.22h1.33c0.12,0,0.22-0.1,0.22-0.22V6.44c0-0.11-0.09-0.21-0.21-0.21C43.57,6.24,43.57,6.24,43.56,6.24z M42.02,10.05c-0.01,1.31-1.04,2.36-2.3,2.36s-2.3-1.07-2.3-2.39s1.03-2.4,2.29-2.4c1.27,0,2.28,1.06,2.3,2.36L42.02,10.05z"/><path class="st1" d="M39.72,7.63c-1.27,0-2.3,1.07-2.3,2.39s1.03,2.39,2.3,2.39s2.28-1.06,2.3-2.36V9.99C42,8.68,40.98,7.63,39.72,7.63z M38.62,10.02c0-0.67,0.5-1.21,1.11-1.21c0.61,0,1.09,0.53,1.11,1.19v0.04c-0.01,0.65-0.5,1.18-1.11,1.18S38.62,10.68,38.62,10.02z"/><path class="st0" d="M49.91,6.04c-0.98,0-1.93,0.4-2.6,1.12V6.45c0-0.12-0.1-0.22-0.22-0.22h-1.33c-0.12,0-0.22,0.1-0.22,0.22v10.21c0,0.12,0.1,0.22,0.22,0.22h1.33c0.12,0,0.22-0.1,0.22-0.22v-3.78c0.68,0.71,1.62,1.12,2.61,1.12c2.07,0,3.75-1.78,3.75-3.99S51.98,6.04,49.91,6.04z M49.6,12.42c-1.26,0-2.28-1.06-2.3-2.36V9.99c0.02-1.31,1.04-2.37,2.29-2.37c1.26,0,2.3,1.07,2.3,2.39S50.86,12.41,49.6,12.42L49.6,12.42z"/><path class="st1" d="M49.6,7.63c-1.26,0-2.28,1.06-2.3,2.36v0.06c0.02,1.31,1.04,2.36,2.3,2.36s2.3-1.07,2.3-2.39S50.86,7.63,49.6,7.63z M49.6,11.23c-0.6,0-1.09-0.53-1.11-1.19V10C48.5,9.34,49,8.81,49.6,8.81c0.6,0,1.11,0.55,1.11,1.21S50.21,11.23,49.6,11.23z"/><path class="st0" d="M34.36,13.59c0,0.12-0.1,0.22-0.22,0.22h-1.34c-0.12,0-0.22-0.1-0.22-0.22V9.24c0-0.93-0.7-1.63-1.54-1.63c-0.76,0-1.39,0.67-1.51,1.54l0.01,4.44c0,0.12-0.1,0.22-0.22,0.22h-1.34c-0.12,0-0.22-0.1-0.22-0.22V9.24c0-0.93-0.7-1.63-1.54-1.63c-0.81,0-1.47,0.75-1.52,1.71v4.27c0,0.12-0.1,0.22-0.22,0.22h-1.33c-0.12,0-0.22-0.1-0.22-0.22V6.44c0.01-0.12,0.1-0.21,0.22-0.21h1.33c0.12,0,0.21,0.1,0.22,0.21v0.63c0.48-0.65,1.24-1.04,2.06-1.05h0.03c1.04,0,1.99,0.57,2.48,1.48c0.43-0.9,1.33-1.48,2.32-1.49c1.54,0,2.79,1.19,2.76,2.65L34.36,13.59z"/><path class="st1" d="M80.32,12.97l-0.07-0.12L78.38,10l1.85-2.81c0.42-0.64,0.25-1.49-0.39-1.92c-0.01-0.01-0.02-0.01-0.03-0.02c-0.22-0.14-0.48-0.21-0.74-0.21h-1.53c-0.53,0-1.03,0.28-1.3,0.74l-0.32,0.53l-0.32-0.53c-0.28-0.46-0.77-0.74-1.31-0.74h-1.53c-0.57,0-1.08,0.35-1.29,0.88c-2.09-1.58-5.03-1.4-6.91,0.43c-0.33,0.32-0.62,0.69-0.85,1.09c-0.85-1.55-2.45-2.6-4.28-2.6c-0.48,0-0.96,0.07-1.41,0.22V3.37c0-0.78-0.63-1.41-1.4-1.41h-1.33c-0.77,0-1.4,0.63-1.4,1.4v3.57c-0.9-1.3-2.38-2.08-3.97-2.09c-0.7,0-1.39,0.15-2.02,0.45c-0.23-0.16-0.51-0.25-0.8-0.25h-1.33c-0.43,0-0.83,0.2-1.1,0.53c-0.02-0.03-0.04-0.05-0.07-0.08c-0.27-0.29-0.65-0.45-1.04-0.45h-1.32c-0.29,0-0.57,0.09-0.8,0.25C40.8,5,40.12,4.85,39.42,4.85c-1.74,0-3.27,0.95-4.16,2.38c-0.19-0.44-0.46-0.85-0.79-1.19c-0.76-0.77-1.8-1.19-2.88-1.19h-0.01c-0.85,0.01-1.67,0.31-2.34,0.84c-0.7-0.54-1.56-0.84-2.45-0.84h-0.03c-0.28,0-0.55,0.03-0.82,0.1c-0.27,0.06-0.53,0.15-0.78,0.27c-0.2-0.11-0.43-0.17-0.67-0.17h-1.33c-0.78,0-1.4,0.63-1.4,1.4v7.14c0,0.78,0.63,1.4,1.4,1.4h1.33c0.78,0,1.41-0.63,1.41-1.41c0,0,0,0,0,0V9.35c0.03-0.34,0.22-0.56,0.34-0.56c0.17,0,0.36,0.17,0.36,0.45v4.35c0,0.78,0.63,1.4,1.4,1.4h1.34c0.78,0,1.4-0.63,1.4-1.4l-0.01-4.35c0.06-0.3,0.24-0.45,0.33-0.45c0.17,0,0.36,0.17,0.36,0.45v4.35c0,0.78,0.63,1.4,1.4,1.4h1.34c0.78,0,1.4-0.63,1.4-1.4v-0.36c0.91,1.23,2.34,1.96,3.87,1.96c0.7,0,1.39-0.15,2.02-0.45c0.23,0.16,0.51,0.25,0.8,0.25h1.32c0.29,0,0.57-0.09,0.8-0.25v1.91c0,0.78,0.63,1.4,1.4,1.4h1.33c0.78,0,1.4-0.63,1.4-1.4v-1.69c0.46,0.14,0.94,0.22,1.42,0.21c1.62,0,3.07-0.83,3.97-2.1v0.5c0,0.78,0.63,1.4,1.4,1.4h1.33c0.29,0,0.57-0.09,0.8-0.25c0.63,0.3,1.32,0.45,2.02,0.45c1.83,0,3.43-1.05,4.28-2.6c1.47,2.52,4.71,3.36,7.22,1.89c0.17-0.1,0.34-0.21,0.5-0.34c0.21,0.52,0.72,0.87,1.29,0.86h1.53c0.53,0,1.03-0.28,1.3-0.74l0.35-0.58l0.35,0.58c0.28,0.46,0.77,0.74,1.31,0.74h1.52c0.77,0,1.39-0.63,1.38-1.39C80.47,13.38,80.42,13.17,80.32,12.97L80.32,12.97z M34.15,13.81h-1.34c-0.12,0-0.22-0.1-0.22-0.22V9.24c0-0.93-0.7-1.63-1.54-1.63c-0.76,0-1.39,0.67-1.51,1.54l0.01,4.44c0,0.12-0.1,0.22-0.22,0.22h-1.34c-0.12,0-0.22-0.1-0.22-0.22V9.24c0-0.93-0.7-1.63-1.54-1.63c-0.81,0-1.47,0.75-1.52,1.71v4.27c0,0.12-0.1,0.22-0.22,0.22h-1.33c-0.12,0-0.22-0.1-0.22-0.22V6.44c0.01-0.12,0.1-0.21,0.22-0.21h1.33c0.12,0,0.21,0.1,0.22,0.21v0.63c0.48-0.65,1.24-1.04,2.06-1.05h0.03c1.04,0,1.99,0.57,2.48,1.48c0.43-0.9,1.33-1.48,2.32-1.49c1.54,0,2.79,1.19,2.76,2.65l0.01,4.91C34.37,13.7,34.27,13.8,34.15,13.81C34.15,13.81,34.15,13.81,34.15,13.81z M43.78,13.59c0,0.12-0.1,0.22-0.22,0.22h-1.33c-0.12,0-0.22-0.1-0.22-0.22v-0.71C41.34,13.6,40.4,14,39.42,14c-2.07,0-3.75-1.78-3.75-3.99s1.69-3.99,3.75-3.99c0.98,0,1.92,0.41,2.6,1.12v-0.7c0-0.12,0.1-0.22,0.22-0.22h1.33c0.11-0.01,0.21,0.08,0.22,0.2c0,0.01,0,0.01,0,0.02V13.59z M49.91,14c-0.98,0-1.92-0.41-2.6-1.12v3.78c0,0.12-0.1,0.22-0.22,0.22h-1.33c-0.12,0-0.22-0.1-0.22-0.22V6.45c0-0.12,0.1-0.21,0.22-0.21h1.33c0.12,0,0.22,0.1,0.22,0.22v0.7c0.68-0.72,1.62-1.12,2.6-1.12c2.07,0,3.75,1.77,3.75,3.98S51.98,14,49.91,14z M63.09,10.87C62.72,12.65,61.22,14,59.43,14c-0.98,0-1.92-0.41-2.6-1.12v0.7c0,0.12-0.1,0.22-0.22,0.22h-1.33c-0.12,0-0.22-0.1-0.22-0.22V3.37c0-0.12,0.1-0.22,0.22-0.22h1.33c0.12,0,0.22,0.1,0.22,0.22v3.78c0.68-0.71,1.62-1.12,2.6-1.11c1.79,0,3.29,1.33,3.66,3.12C63.21,9.73,63.21,10.31,63.09,10.87L63.09,10.87L63.09,10.87z M68.26,14.01c-1.9,0.01-3.55-1.29-3.97-3.14c-0.12-0.56-0.12-1.13,0-1.69c0.42-1.85,2.07-3.15,3.97-3.14c2.25,0,4.06,1.78,4.06,3.99S70.5,14.01,68.26,14.01L68.26,14.01z M79.09,13.81h-1.53c-0.12,0-0.23-0.06-0.29-0.16l-1.37-2.28l-1.37,2.28c-0.06,0.1-0.17,0.16-0.29,0.16h-1.53c-0.04,0-0.08-0.01-0.11-0.03c-0.09-0.06-0.12-0.18-0.06-0.27c0,0,0,0,0,0l2.31-3.5l-2.28-3.47c-0.02-0.03-0.03-0.07-0.03-0.11c0-0.11,0.09-0.2,0.2-0.2h1.53c0.12,0,0.23,0.06,0.29,0.16l1.34,2.25l1.34-2.25c0.06-0.1,0.17-0.16,0.29-0.16h1.53c0.04,0,0.08,0.01,0.11,0.03c0.09,0.06,0.12,0.18,0.06,0.27c0,0,0,0,0,0L76.96,10l2.31,3.5c0.02,0.03,0.03,0.07,0.03,0.11C79.29,13.72,79.2,13.81,79.09,13.81C79.09,13.81,79.09,13.81,79.09,13.81L79.09,13.81z"/><path class="st0" d="M10,1.21c-4.87,0-8.81,3.95-8.81,8.81s3.95,8.81,8.81,8.81s8.81-3.95,8.81-8.81C18.81,5.15,14.87,1.21,10,1.21z M14.18,12.19c-1.84,1.84-4.55,2.2-6.38,2.2c-0.67,0-1.34-0.05-2-0.15c0,0-0.97-5.37,2.04-8.39c0.79-0.79,1.86-1.22,2.98-1.22c1.21,0,2.37,0.49,3.23,1.35C15.8,7.73,15.85,10.5,14.18,12.19z"/><path class="st1" d="M10,0.02c-5.52,0-10,4.48-10,10s4.48,10,10,10s10-4.48,10-10C19.99,4.5,15.52,0.02,10,0.02z M10,18.83c-4.87,0-8.81-3.95-8.81-8.81S5.13,1.2,10,1.2s8.81,3.95,8.81,8.81C18.81,14.89,14.87,18.83,10,18.83z"/><path class="st1" d="M14.04,5.98c-1.75-1.75-4.53-1.81-6.2-0.14C4.83,8.86,5.8,14.23,5.8,14.23s5.37,0.97,8.39-2.04C15.85,10.5,15.8,7.73,14.04,5.98z M11.88,9.87l-0.87,1.78l-0.86-1.78L8.38,9.01l1.77-0.86l0.86-1.78l0.87,1.78l1.77,0.86L11.88,9.87z"/><polygon class="st0" points="13.65,9.01 11.88,9.87 11.01,11.65 10.15,9.87 8.38,9.01 10.15,8.15 11.01,6.37 11.88,8.15 "/></g></svg>);
    background-size: 65px 20px;
}

<kort-js 
    data-url="https://retina-tiles.p.rapidapi.com/local/osm@2x/v1/${z}/${x}/${y}.png?rapidapi-key=${token}"
    data-token="YOUR_ACCESS_TOKEN"
    data-tilesize="512"
    data-set-latitude="40.712778" 
    data-set-longitude="-74.006111"
    data-set-zoom="12">
    <p slot="attribution-text">Tiles &copy: <a href="https://www.maptilesapi.com/retina-tiles/">Retina Tiles API</a>, Map data &copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors</p>
</kort-js>

<kort-js 
    data-url="https://api.maptiler.com/maps/basic/${z}/${x}/${y}@2x.png?key=${token}"
    data-token="YOUR_ACCESS_TOKEN"
    data-tilesize="1024"
    data-set-latitude="40.712778" 
    data-set-longitude="-74.006111"
    data-set-zoom="12">
    <p slot="attribution-text"><a href="https://www.maptiler.com/copyright/" target="_blank">© MapTiler</a> <a href="https://www.openstreetmap.org/copyright" target="_blank">© OpenStreetMap contributors</a></p>
    <div slot="attribution-icon"><a href="https://www.maptiler.com"><img src="https://api.maptiler.com/resources/logo.svg" alt="MapTiler logo"></a></div>
</kort-js>

div[slot="attribution-icon"] {
    position: absolute;
    left: 10px;
    bottom: 10px;
}

<kort-js data-url="https://tile.openstreetmap.org/${z}/${x}/${y}.png">
    <p slot="attribution-text">© <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors</p>
</kort-js>

Attribution

Attribution is provided with the attribution-text-slot (slot="attribution-text") and attribution-icon-slot (slot="attribution-icon").

By default, it is assumed the text content provided is a paragraph tag with embedded anchor tags and will be placed as a single line of text in the bottom-right corner of the map. Any content can be provided, though you will have to style it accordingly. See details on styling further below.

Some tile providers require their logo as part of the attribution, which is the purpose of the attribution-icon-slot.

<kort-js 
    data-url="https://api.mapbox.com/styles/v1/mapbox/${id}/tiles/${z}/${x}/${y}?${token}"
    data-id="light-v10"
    data-token="YOUR_ACCESS_TOKEN"
    data-tilesize="512"
    data-maxzoom="22"
    data-set-latitude="40.712778" 
    data-set-longitude="-74.006111" 
    data-set-zoom="10">
    <p slot="attribution-text">© <a href="https://www.mapbox.com/about/maps/">Mapbox</a> © <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a> <strong><a href="https://www.mapbox.com/map-feedback/" target="_blank">Improve this map</a></strong></p>
    <div slot="attribution-icon"></div>
</kort-js>

p[slot="attribution-icon"] {
    position: absolute;
    height: 20px;
    width: 65px;
    left: 10px;
    bottom: 10px;
    text-indent: -9999px;
    background-image: url(data:image/svg+xml;base64,<?xml version="1.0" encoding="utf-8"?><svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 80.47 20.02" style="enable-background:new 0 0 80.47 20.02;" xml:space="preserve"><style type="text/css">.st0{opacity:0.6;fill:#FFFFFF;enable-background:new    ;}.st1{opacity:0.6;enable-background:new    ;}</style><g><path class="st0" d="M79.29,13.61c0,0.11-0.09,0.2-0.2,0.2h-1.53c-0.12,0-0.23-0.06-0.29-0.16l-1.37-2.28l-1.37,2.28c-0.06,0.1-0.17,0.16-0.29,0.16h-1.53c-0.04,0-0.08-0.01-0.11-0.03c-0.09-0.06-0.12-0.18-0.06-0.27c0,0,0,0,0,0l2.31-3.5l-2.28-3.47c-0.02-0.03-0.03-0.07-0.03-0.11c0-0.11,0.09-0.2,0.2-0.2h1.53c0.12,0,0.23,0.06,0.29,0.16l1.34,2.25l1.33-2.24c0.06-0.1,0.17-0.16,0.29-0.16h1.53c0.04,0,0.08,0.01,0.11,0.03c0.09,0.06,0.12,0.18,0.06,0.27c0,0,0,0,0,0L76.96,10l2.31,3.5C79.28,13.53,79.29,13.57,79.29,13.61z"/><path class="st0" d="M63.09,9.16c-0.37-1.79-1.87-3.12-3.66-3.12c-0.98,0-1.93,0.4-2.6,1.12V3.37c0-0.12-0.1-0.22-0.22-0.22h-1.33c-0.12,0-0.22,0.1-0.22,0.22v10.21c0,0.12,0.1,0.22,0.22,0.22h1.33c0.12,0,0.22-0.1,0.22-0.22v-0.7c0.68,0.71,1.62,1.12,2.6,1.12c1.79,0,3.29-1.34,3.66-3.13C63.21,10.3,63.21,9.72,63.09,9.16L63.09,9.16z M59.12,12.41c-1.26,0-2.28-1.06-2.3-2.36V9.99c0.02-1.31,1.04-2.36,2.3-2.36s2.3,1.07,2.3,2.39S60.39,12.41,59.12,12.41z"/><path class="st0" d="M68.26,6.04c-1.89-0.01-3.54,1.29-3.96,3.13c-0.12,0.56-0.12,1.13,0,1.69c0.42,1.85,2.07,3.16,3.97,3.14c2.24,0,4.06-1.78,4.06-3.99S70.51,6.04,68.26,6.04z M68.24,12.42c-1.27,0-2.3-1.07-2.3-2.39s1.03-2.4,2.3-2.4s2.3,1.07,2.3,2.39S69.51,12.41,68.24,12.42L68.24,12.42z"/><path class="st1" d="M59.12,7.63c-1.26,0-2.28,1.06-2.3,2.36v0.06c0.02,1.31,1.04,2.36,2.3,2.36s2.3-1.07,2.3-2.39S60.39,7.63,59.12,7.63z M59.12,11.23c-0.6,0-1.09-0.53-1.11-1.19V10c0.01-0.66,0.51-1.19,1.11-1.19s1.11,0.54,1.11,1.21S59.74,11.23,59.12,11.23z"/><path class="st1" d="M68.24,7.63c-1.27,0-2.3,1.07-2.3,2.39s1.03,2.39,2.3,2.39s2.3-1.07,2.3-2.39S69.51,7.63,68.24,7.63z M68.24,11.23c-0.61,0-1.11-0.54-1.11-1.21s0.5-1.2,1.11-1.2s1.11,0.54,1.11,1.21S68.85,11.23,68.24,11.23z"/><path class="st0" d="M43.56,6.24h-1.33c-0.12,0-0.22,0.1-0.22,0.22v0.7c-0.68-0.71-1.62-1.12-2.6-1.12c-2.07,0-3.75,1.78-3.75,3.99s1.69,3.99,3.75,3.99c0.99,0,1.93-0.41,2.6-1.13v0.7c0,0.12,0.1,0.22,0.22,0.22h1.33c0.12,0,0.22-0.1,0.22-0.22V6.44c0-0.11-0.09-0.21-0.21-0.21C43.57,6.24,43.57,6.24,43.56,6.24z M42.02,10.05c-0.01,1.31-1.04,2.36-2.3,2.36s-2.3-1.07-2.3-2.39s1.03-2.4,2.29-2.4c1.27,0,2.28,1.06,2.3,2.36L42.02,10.05z"/><path class="st1" d="M39.72,7.63c-1.27,0-2.3,1.07-2.3,2.39s1.03,2.39,2.3,2.39s2.28-1.06,2.3-2.36V9.99C42,8.68,40.98,7.63,39.72,7.63z M38.62,10.02c0-0.67,0.5-1.21,1.11-1.21c0.61,0,1.09,0.53,1.11,1.19v0.04c-0.01,0.65-0.5,1.18-1.11,1.18S38.62,10.68,38.62,10.02z"/><path class="st0" d="M49.91,6.04c-0.98,0-1.93,0.4-2.6,1.12V6.45c0-0.12-0.1-0.22-0.22-0.22h-1.33c-0.12,0-0.22,0.1-0.22,0.22v10.21c0,0.12,0.1,0.22,0.22,0.22h1.33c0.12,0,0.22-0.1,0.22-0.22v-3.78c0.68,0.71,1.62,1.12,2.61,1.12c2.07,0,3.75-1.78,3.75-3.99S51.98,6.04,49.91,6.04z M49.6,12.42c-1.26,0-2.28-1.06-2.3-2.36V9.99c0.02-1.31,1.04-2.37,2.29-2.37c1.26,0,2.3,1.07,2.3,2.39S50.86,12.41,49.6,12.42L49.6,12.42z"/><path class="st1" d="M49.6,7.63c-1.26,0-2.28,1.06-2.3,2.36v0.06c0.02,1.31,1.04,2.36,2.3,2.36s2.3-1.07,2.3-2.39S50.86,7.63,49.6,7.63z M49.6,11.23c-0.6,0-1.09-0.53-1.11-1.19V10C48.5,9.34,49,8.81,49.6,8.81c0.6,0,1.11,0.55,1.11,1.21S50.21,11.23,49.6,11.23z"/><path class="st0" d="M34.36,13.59c0,0.12-0.1,0.22-0.22,0.22h-1.34c-0.12,0-0.22-0.1-0.22-0.22V9.24c0-0.93-0.7-1.63-1.54-1.63c-0.76,0-1.39,0.67-1.51,1.54l0.01,4.44c0,0.12-0.1,0.22-0.22,0.22h-1.34c-0.12,0-0.22-0.1-0.22-0.22V9.24c0-0.93-0.7-1.63-1.54-1.63c-0.81,0-1.47,0.75-1.52,1.71v4.27c0,0.12-0.1,0.22-0.22,0.22h-1.33c-0.12,0-0.22-0.1-0.22-0.22V6.44c0.01-0.12,0.1-0.21,0.22-0.21h1.33c0.12,0,0.21,0.1,0.22,0.21v0.63c0.48-0.65,1.24-1.04,2.06-1.05h0.03c1.04,0,1.99,0.57,2.48,1.48c0.43-0.9,1.33-1.48,2.32-1.49c1.54,0,2.79,1.19,2.76,2.65L34.36,13.59z"/><path class="st1" d="M80.32,12.97l-0.07-0.12L78.38,10l1.85-2.81c0.42-0.64,0.25-1.49-0.39-1.92c-0.01-0.01-0.02-0.01-0.03-0.02c-0.22-0.14-0.48-0.21-0.74-0.21h-1.53c-0.53,0-1.03,0.28-1.3,0.74l-0.32,0.53l-0.32-0.53c-0.28-0.46-0.77-0.74-1.31-0.74h-1.53c-0.57,0-1.08,0.35-1.29,0.88c-2.09-1.58-5.03-1.4-6.91,0.43c-0.33,0.32-0.62,0.69-0.85,1.09c-0.85-1.55-2.45-2.6-4.28-2.6c-0.48,0-0.96,0.07-1.41,0.22V3.37c0-0.78-0.63-1.41-1.4-1.41h-1.33c-0.77,0-1.4,0.63-1.4,1.4v3.57c-0.9-1.3-2.38-2.08-3.97-2.09c-0.7,0-1.39,0.15-2.02,0.45c-0.23-0.16-0.51-0.25-0.8-0.25h-1.33c-0.43,0-0.83,0.2-1.1,0.53c-0.02-0.03-0.04-0.05-0.07-0.08c-0.27-0.29-0.65-0.45-1.04-0.45h-1.32c-0.29,0-0.57,0.09-0.8,0.25C40.8,5,40.12,4.85,39.42,4.85c-1.74,0-3.27,0.95-4.16,2.38c-0.19-0.44-0.46-0.85-0.79-1.19c-0.76-0.77-1.8-1.19-2.88-1.19h-0.01c-0.85,0.01-1.67,0.31-2.34,0.84c-0.7-0.54-1.56-0.84-2.45-0.84h-0.03c-0.28,0-0.55,0.03-0.82,0.1c-0.27,0.06-0.53,0.15-0.78,0.27c-0.2-0.11-0.43-0.17-0.67-0.17h-1.33c-0.78,0-1.4,0.63-1.4,1.4v7.14c0,0.78,0.63,1.4,1.4,1.4h1.33c0.78,0,1.41-0.63,1.41-1.41c0,0,0,0,0,0V9.35c0.03-0.34,0.22-0.56,0.34-0.56c0.17,0,0.36,0.17,0.36,0.45v4.35c0,0.78,0.63,1.4,1.4,1.4h1.34c0.78,0,1.4-0.63,1.4-1.4l-0.01-4.35c0.06-0.3,0.24-0.45,0.33-0.45c0.17,0,0.36,0.17,0.36,0.45v4.35c0,0.78,0.63,1.4,1.4,1.4h1.34c0.78,0,1.4-0.63,1.4-1.4v-0.36c0.91,1.23,2.34,1.96,3.87,1.96c0.7,0,1.39-0.15,2.02-0.45c0.23,0.16,0.51,0.25,0.8,0.25h1.32c0.29,0,0.57-0.09,0.8-0.25v1.91c0,0.78,0.63,1.4,1.4,1.4h1.33c0.78,0,1.4-0.63,1.4-1.4v-1.69c0.46,0.14,0.94,0.22,1.42,0.21c1.62,0,3.07-0.83,3.97-2.1v0.5c0,0.78,0.63,1.4,1.4,1.4h1.33c0.29,0,0.57-0.09,0.8-0.25c0.63,0.3,1.32,0.45,2.02,0.45c1.83,0,3.43-1.05,4.28-2.6c1.47,2.52,4.71,3.36,7.22,1.89c0.17-0.1,0.34-0.21,0.5-0.34c0.21,0.52,0.72,0.87,1.29,0.86h1.53c0.53,0,1.03-0.28,1.3-0.74l0.35-0.58l0.35,0.58c0.28,0.46,0.77,0.74,1.31,0.74h1.52c0.77,0,1.39-0.63,1.38-1.39C80.47,13.38,80.42,13.17,80.32,12.97L80.32,12.97z M34.15,13.81h-1.34c-0.12,0-0.22-0.1-0.22-0.22V9.24c0-0.93-0.7-1.63-1.54-1.63c-0.76,0-1.39,0.67-1.51,1.54l0.01,4.44c0,0.12-0.1,0.22-0.22,0.22h-1.34c-0.12,0-0.22-0.1-0.22-0.22V9.24c0-0.93-0.7-1.63-1.54-1.63c-0.81,0-1.47,0.75-1.52,1.71v4.27c0,0.12-0.1,0.22-0.22,0.22h-1.33c-0.12,0-0.22-0.1-0.22-0.22V6.44c0.01-0.12,0.1-0.21,0.22-0.21h1.33c0.12,0,0.21,0.1,0.22,0.21v0.63c0.48-0.65,1.24-1.04,2.06-1.05h0.03c1.04,0,1.99,0.57,2.48,1.48c0.43-0.9,1.33-1.48,2.32-1.49c1.54,0,2.79,1.19,2.76,2.65l0.01,4.91C34.37,13.7,34.27,13.8,34.15,13.81C34.15,13.81,34.15,13.81,34.15,13.81z M43.78,13.59c0,0.12-0.1,0.22-0.22,0.22h-1.33c-0.12,0-0.22-0.1-0.22-0.22v-0.71C41.34,13.6,40.4,14,39.42,14c-2.07,0-3.75-1.78-3.75-3.99s1.69-3.99,3.75-3.99c0.98,0,1.92,0.41,2.6,1.12v-0.7c0-0.12,0.1-0.22,0.22-0.22h1.33c0.11-0.01,0.21,0.08,0.22,0.2c0,0.01,0,0.01,0,0.02V13.59z M49.91,14c-0.98,0-1.92-0.41-2.6-1.12v3.78c0,0.12-0.1,0.22-0.22,0.22h-1.33c-0.12,0-0.22-0.1-0.22-0.22V6.45c0-0.12,0.1-0.21,0.22-0.21h1.33c0.12,0,0.22,0.1,0.22,0.22v0.7c0.68-0.72,1.62-1.12,2.6-1.12c2.07,0,3.75,1.77,3.75,3.98S51.98,14,49.91,14z M63.09,10.87C62.72,12.65,61.22,14,59.43,14c-0.98,0-1.92-0.41-2.6-1.12v0.7c0,0.12-0.1,0.22-0.22,0.22h-1.33c-0.12,0-0.22-0.1-0.22-0.22V3.37c0-0.12,0.1-0.22,0.22-0.22h1.33c0.12,0,0.22,0.1,0.22,0.22v3.78c0.68-0.71,1.62-1.12,2.6-1.11c1.79,0,3.29,1.33,3.66,3.12C63.21,9.73,63.21,10.31,63.09,10.87L63.09,10.87L63.09,10.87z M68.26,14.01c-1.9,0.01-3.55-1.29-3.97-3.14c-0.12-0.56-0.12-1.13,0-1.69c0.42-1.85,2.07-3.15,3.97-3.14c2.25,0,4.06,1.78,4.06,3.99S70.5,14.01,68.26,14.01L68.26,14.01z M79.09,13.81h-1.53c-0.12,0-0.23-0.06-0.29-0.16l-1.37-2.28l-1.37,2.28c-0.06,0.1-0.17,0.16-0.29,0.16h-1.53c-0.04,0-0.08-0.01-0.11-0.03c-0.09-0.06-0.12-0.18-0.06-0.27c0,0,0,0,0,0l2.31-3.5l-2.28-3.47c-0.02-0.03-0.03-0.07-0.03-0.11c0-0.11,0.09-0.2,0.2-0.2h1.53c0.12,0,0.23,0.06,0.29,0.16l1.34,2.25l1.34-2.25c0.06-0.1,0.17-0.16,0.29-0.16h1.53c0.04,0,0.08,0.01,0.11,0.03c0.09,0.06,0.12,0.18,0.06,0.27c0,0,0,0,0,0L76.96,10l2.31,3.5c0.02,0.03,0.03,0.07,0.03,0.11C79.29,13.72,79.2,13.81,79.09,13.81C79.09,13.81,79.09,13.81,79.09,13.81L79.09,13.81z"/><path class="st0" d="M10,1.21c-4.87,0-8.81,3.95-8.81,8.81s3.95,8.81,8.81,8.81s8.81-3.95,8.81-8.81C18.81,5.15,14.87,1.21,10,1.21z M14.18,12.19c-1.84,1.84-4.55,2.2-6.38,2.2c-0.67,0-1.34-0.05-2-0.15c0,0-0.97-5.37,2.04-8.39c0.79-0.79,1.86-1.22,2.98-1.22c1.21,0,2.37,0.49,3.23,1.35C15.8,7.73,15.85,10.5,14.18,12.19z"/><path class="st1" d="M10,0.02c-5.52,0-10,4.48-10,10s4.48,10,10,10s10-4.48,10-10C19.99,4.5,15.52,0.02,10,0.02z M10,18.83c-4.87,0-8.81-3.95-8.81-8.81S5.13,1.2,10,1.2s8.81,3.95,8.81,8.81C18.81,14.89,14.87,18.83,10,18.83z"/><path class="st1" d="M14.04,5.98c-1.75-1.75-4.53-1.81-6.2-0.14C4.83,8.86,5.8,14.23,5.8,14.23s5.37,0.97,8.39-2.04C15.85,10.5,15.8,7.73,14.04,5.98z M11.88,9.87l-0.87,1.78l-0.86-1.78L8.38,9.01l1.77-0.86l0.86-1.78l0.87,1.78l1.77,0.86L11.88,9.87z"/><polygon class="st0" points="13.65,9.01 11.88,9.87 11.01,11.65 10.15,9.87 8.38,9.01 10.15,8.15 11.01,6.37 11.88,8.15 "/></g></svg>);
    background-size: 65px 20px;
}

See further details on proper attribution for Mapbox here.

Starting location

To specify a starting location, set the following attributes on the main kortjs-element. Kortjs defaults to Greenwich, England if no location is provided.

data-set-longitude
data-set-latitude
data-set-zoom

<kort-js 
    data-url="TILE_SERVER_URL"
    data-set-latitude="40.712778" 
    data-set-longitude="-74.006111" 
    data-set-zoom="10">
    <p slot="attribution-text">...</p>
</kort-js>

Marker

A center marker can be provided using the marker-slot (slot="marker"). By default, it is assumed the marker is pointing at the middle of its bottom edge. Change it using the data-offsetx and data-offsety attributes on the marker-element itself. The offset is measured in pixels from the marker's upper-left corner.

<kort-js data-url="https://tile.openstreetmap.org/${z}/${x}/${y}.png">
    <p slot="attribution-text">© <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors</p>
    <svg slot="marker" part="marker" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
        <path d="M12 2C8 2 5 5 5 9c0 5 7 13 7 13s7-8 7-13c0-4-3-7-7-7zM7 9a5 5 0 0 1 10 0c0 3-3 7-5 10-2-3-5-7-5-10z" />
        <circle part="marker-circle" cx="12" cy="9" r="2.5" />
    </svg>
</kort-js>

<kort-js data-url="https://tile.openstreetmap.org/${z}/${x}/${y}.png">
    <p slot="attribution-text">© <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors</p>
    <svg slot="marker" part="marker" data-offsetx="-18" data-offsety="-18"xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
        <path d="M15.5 14h-.8l-.3-.3c1-1.1 1.6-2.6 1.6-4.2a6.5 6.5 0 1 0-2.3 5l.3.2v.8l5 5 1.5-1.5-5-5zm-6 0a4.5 4.5 0 1 1 0-9 4.5 4.5 0 0 1 0 9z"/>
    </svg>
</kort-js>

:paintbrush: Styling

Main kortjs-element

By default, web components are inline. You are free to change the kortjs-element to a block-level element along with any other properties by targeting either kort-js or using a class, id, etc.

kort-js {
    display: block;
    height: 400px;
    width: 400px;
    overflow: hidden;
    border-radius: 12px;
}

Attribution slot-elements

The content provided to the attribution-text slot-element can be styled as normal with a class, id etc. or by targeting the slot="attribution-text" attribute directly. The container, in which the attribution-text slot-element sits, must be styled with the ::part(attribution-container) pseudo-element. The name of the part is set by Kortjs and cannot be changed. Minimal default styling is provided by Kortjs.

The content provided to the attribution-icon slot-element can be styled as normal with a class, id etc. or by targeting the slot="attribution-icon" attribute directly. No default styling is provided for this element.

p[slot="attribution-text"] {
    font-size: 16px;
}

kort-js::part(attribution-container){
    background: white;
}

div[slot="attribution-icon"] {
    ...
}

Center marker slot-element

The marker slot-element must be styled using a ::part pseudo-element. Any nested elements must likewise be styled using ::part pseudo-elements. The names of these elements are set på you. You are free to name them as you see fit, e.g. part="marker". Minimal default styling is provided by Kortjs.

<kort-js data-url="https://tile.openstreetmap.org/${z}/${x}/${y}.png">
    <p slot="attribution-text">© <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors</p>
    <svg slot="marker" part="marker" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
        <path d="M12 2C8 2 5 5 5 9c0 5 7 13 7 13s7-8 7-13c0-4-3-7-7-7zM7 9a5 5 0 0 1 10 0c0 3-3 7-5 10-2-3-5-7-5-10z" />
        <circle part="marker-circle" cx="12" cy="9" r="2.5" />
    </svg>
</kort-js>

kort-js::part(marker){
    fill: teal;
    width: 128px;
    height: 128px;
    filter: drop-shadow(0 0.2rem 0.25rem rgba(0, 0, 0, 0.2));
}
kort-js::part(marker-circle){
    fill: black;
}

Color of map background

The color of the map background is styled with the custom property --kortjs-backgroundColor. The default color is #dddddd.

kort-js {
    --kortjs-backgroundColor: white;
}

:bicyclist: Reacting to lifecycle events

The attribute data-is-connected on the kortjs-element is set in correspondence with the web component lifecycle callbacks: connectedCallback and disconnectedCallback.

The data-is-connected attribute is added at the first occurence of connectedCallback with a value of true.

On disconnectedCallback its value is set to false.

The state of the kortjs-element can also be accessed in javascript with the native isConnected property.

kort-js * {
    display: none;
}

kort-js[data-is-connected="true"] * {
    display: revert;
}

:pushpin: Use case - Location-picker

The first released version (0.1.0) focuses on the use case of interactively selecting a location using a slippy map instead of having to find and input coordinates manually. As such, any marker provided as a slotted element will be placed in the center of the map. Aside from panning and zooming, no other user interaction is supported in this version.

As the user pans and zooms around the map, a set of separate location attributes will be updated on the kortjs-element corresponding to the location in the center of the map. These are:

data-get-longitude
data-get-latitude
data-get-zoom

As the attributes use a data prefix, the coordinates can be accessed with the dataset property on the kortjs-element.

const kortjs = document.getElementsByTagName("kort-js")[0];
const button = document.getElementById("myBytton");
button.addEventListener("click", () => {
    const longitude = kortjs.dataset.getLongitude;
    const latitude = kortjs.dataset.getLatitude;
    const zoom = kortjs.dataset.getZoom;
    console.log(longitude, latitude, zoom);
});

:warning: Known issues

Missing referer header on tile-requests in Chromium-based browsers

In Chromium-based browsers, fetch-requests made by a worker spawned using a blob-url will not include a referer header. The worker in Kortjs is spawned this way.

The missing referer header can lead to some tile-servers blocking the requests. Most notably the OpenStreetMaps tile-server uses the referer header to throttle incoming requests and blacklists clients if usage is deemed outside of the provided guidelines. Due to the missing referer header, requests from different clients may be seen as coming from just one, increasing the risk of getting blacklisted.

Chromium bug report

:evergreen_tree: Browser support

Kortjs has been tested in the newest versions of Chrome (desktop and Android) and Firefox (desktop). Support in other browsers (and older versions) may be sporadic and/or nonexistent. Backwards-compatibility is not - and will not ever become - a priority. Refer to other map-libraries for backwards-compatibility.

Safari has been left out due to the author - that's me! - not having access to a debuggable instance.

License

Kortjs is available under the MIT license