TomTom Maps SDK for JavaScript
This is the documentation of version 0.62.3. Go to the latest version, 1.0.0-rc.5.

Routing module

The Routing Module enables displaying calculated routes and waypoints on maps with comprehensive functionality for visualizing navigation routes, alternative routes, turn-by-turn guidance, traffic incidents that occur along the calculated path, and route-related interactions.

What this module owns: the route lines, waypoints, section overlays, instruction arrows and summary bubbles it draws, and how they look — the color, width, waypointSize and layers configuration in Route styling. It never restyles the roads underneath, which belong to the Styling module. A route given no color reads the map's accent as its default, and its traffic sections follow the traffic.incidents.*Color knobs (Borrowed looks). No other knob reaches route layers. See Who owns what.

This guide covers showing routes and waypoints, events and the data shown. Two features of the module have a guide of their own:

Guide Covers
Route styling The route's colour, width, waypoint size and layers, its knob catalogue, layer positioning and charging stop icons
Route sections The overlays drawn per stretch of road: tunnels, ferries, traffic, speed limit signs, border crossings and the rest

Initialization

import { TomTomMap, RoutingModule } from '@tomtom-org/maps-sdk/map';

// Initialize map
const map = new TomTomMap({ mapLibre: { container: 'map' } });

// Initialize Routes module with default configuration
const routingModule = await RoutingModule.create(map);

// Or with custom configuration
const routingModule = await RoutingModule.create(map, {
    displayUnits: {
        distance: { type: 'metric' }
    },
    waypoints: {
        entryPoints: 'main-when-available'
    }
});

Without displayUnits, the labels follow the global units (TomTomConfig.instance.put({ displayUnits })) in force when they are drawn: a change reaches routes already shown on their next showRoutes or configuration change. getConfig() returns only what you passed, never the global units.

Displaying routes

Display calculated routes on the map:

import { calculateRoute, geocodeOne } from '@tomtom-org/maps-sdk/services';

// Calculate a route with coordinates
const route = await calculateRoute({
    locations: [
        [4.9041, 52.3676], // Amsterdam
        [4.4777, 51.9244]  // Rotterdam
    ],
});

// Or calculate a route with geocoded locations
const waypoints = await Promise.all([
    geocodeOne('Amsterdam, Netherlands'),
    geocodeOne('Rotterdam, Netherlands')
]);

const routes = await calculateRoute({ locations: waypoints });

// Show the route
await routingModule.showRoutes(route);

Note: showRoutes draws the route line but does not show waypoint markers (start, stop, destination pins). Call showWaypoints separately to display them — see Waypoints below.

Displaying guidance on map

Request guidance instructions when calculating a route to show them visually:

import { calculateRoute } from '@tomtom-org/maps-sdk/services';

const route = await calculateRoute({
    locations: [
        [4.9041, 52.3676], // Amsterdam
        [4.4777, 51.9244]  // Rotterdam
    ],
    guidance: {
        type: 'coded'
    }
});

// Display route with guidance on map
await routingModule.showRoutes(route);

Route selection

Change which route appears as selected when displaying multiple routes:

import { calculateRoute } from '@tomtom-org/maps-sdk/services';

// Calculate route with alternatives
const routes = await calculateRoute({
    locations: [
        [4.9041, 52.3676], // Amsterdam
        [4.4777, 51.9244]  // Rotterdam
    ],
    maxAlternatives: 2,
});

// Show the routes (first route selected by default)
await routingModule.showRoutes(routes);

// Show the routes with specific selection
await routingModule.showRoutes(routes, { selectedIndex: 1 });

// Switch to second route
await routingModule.selectRoute(1);

// Switch back to first route
await routingModule.selectRoute(0);

Waypoints

showRoutes only draws route lines — waypoint markers (start, stop, and destination pins) are not included. You must call showWaypoints separately:

const locations = [
    [4.9041, 52.3676], // Amsterdam
    [4.4777, 51.9244]  // Rotterdam
];

const route = await calculateRoute({ locations });

// Draw the route line
await routingModule.showRoutes(route);

// Waypoint markers must be shown separately
await routingModule.showWaypoints(locations);

// Clear waypoints independently from routes
await routingModule.clearWaypoints();

A stop's pin is labelled with its name, and — when the stop carries a pauseDurationSeconds — with how long the route waits there:

const locations = [
    [2.1734, 41.3851],
    {
        type: 'Feature',
        geometry: { type: 'Point', coordinates: [2.4467, 41.5381] },
        // the pin reads "30 min" under the stop name
        properties: { pauseDurationSeconds: 30 * 60 }
    },
    [2.8214, 41.9794]
];

await routingModule.showRoutes(await calculateRoute({ locations }));
await routingModule.showWaypoints(locations);

The wait is formatted with the SDK's display units, and the label is the routeWaypointLabel layer — restyle or replace it through layers.waypoints.routeWaypointLabel like any other routing layer.

Charging stop pins say the same thing in the same way: their label carries the whole time spent at the stop, which is the charging plus any wait asked for at the same place. A label that wants only the charging part can still read chargingDuration:

const routingModule = await RoutingModule.create(map, {
    chargingStops: { label: { title: ['format', ['get', 'chargingDuration'], {}] } }
});

Waypoints or places

Every location a route is calculated through is a waypoint: showWaypoints draws it with its role (start, stop or finish), its stop mark and the module's waypoints events. A place the user is still choosing among, such as a search result or a candidate stop, belongs to the Places module. Once it joins the route, clear it there and hand it to showWaypoints, so one location is never drawn twice:

places.events.on('click', async (place) => {
    const locations = [origin, place, destination];
    await places.clear();
    await routingModule.showRoutes(await calculateRoute({ locations }));
    await routingModule.showWaypoints(locations);
});

A location several routing modules share, such as the one destination of routes from several origins, can be marked once by a Places module instead of once per route.

Everything below reaches the waypoints already shown when it changes through applyConfig, and they keep their ids and event states. It is all live on the waypoints playground:

Pins per role

waypoints.icon.style styles every pin; waypoints.icon.start, waypoints.icon.middle and waypoints.icon.finish style one role each, over it. A pin left without a fillColor takes the route's color:

const routingModule = await RoutingModule.create(map, {
    waypoints: {
        icon: {
            style: { outlineColor: '#FFFFFF' },
            start: { style: { fillColor: '#1B7A3E' } },
            finish: { style: { fillColor: '#C0392B' } }
        }
    }
});

Stop marks

A stop's pin carries its number among the stops, 1 for the first. waypoints.stopNumbering sets 'letters' (A to Z, then AA) or 'none'. The count includes every stop, those whose pin a mapping replaces too, so the marks keep matching the stop order. The start and finish pins draw their own glyph instead. The mark is the waypoint's stopDisplayLabel property, which events.waypoints handlers receive.

Labels

Each pin is labelled with its POI name, else its address, and how long the route waits there. waypoints.label.visible: false drops the labels, and waypoints.label.title writes your own, as label.title does for places: a function of the waypoint, or a MapLibre expression:

routingModule.applyConfig({
    waypoints: {
        label: {
            title: (waypoint) => (waypoint.properties.indexType === 'finish' ? 'Home' : buildWaypointTitle(waypoint) ?? '')
        }
    }
});

Hover and click

Once a handler covers the waypoints, a hovered or clicked pin grows by waypoints.highlight.sizeFactor, 1.2 times unless set, its stop mark with it. It is clamped to ROUTE_WAYPOINT_HIGHLIGHT_SIZE_FACTOR_RANGE, 1 to 1.5, and 1 draws a hovered pin as any other. The waypoints scope has the event state methods to put that state from your own UI:

routingModule.events.waypoints.on('hover', (waypoint) => showStopCard(waypoint.properties));
routingModule.events.waypoints.putEventState({ index: 1, state: 'click' });

Icons of your own

A role's image replaces its pin, and waypoints.icon.mapping picks a pin per waypoint from its data, as icon.mapping does for places:

A waypoint fn returns undefined for keeps its role's pin and stop mark:

const routingModule = await RoutingModule.create(map, {
    waypoints: {
        icon: {
            finish: { image: { image: chequeredFlagSVG } },
            mapping: { to: 'poiCategory', fn: (waypoint) => waypoint.properties.poi?.categories?.[0] }
        }
    }
});

An image is drawn at pixel ratio 2 unless it sets pixelRatio, standing on the waypoint by its bottom middle as the SDK's pins do, which are 120 × 140 pixels. Images, styles and the stop numbering serialize; mapping and a function title do not, and RoutingModuleSerializableConfig leaves them out.

Showing and hiding

setVisible(false) hides everything the module draws (route lines, waypoints, sections, guidance, charging stops, summary bubbles and border crossings) and keeps what it shows. showRoutes, showWaypoints, the clear methods and a style change leave a hidden module hidden, and setVisible(true) draws the routes and waypoints it holds again:

const routingModule = await RoutingModule.create(map, { visible: false }); // starts hidden
await routingModule.showRoutes(route);   // kept, not drawn
routingModule.setVisible(true);          // draws the route
routingModule.isVisible();               // true

It is the config's visible, so isVisible() reads the setting back and config-change reports it. While the module is shown, each part's own visible (sections.<type>.visible, summaryBubbles.visible, …) still decides whether that part draws. The route style playground toggles it.

Events

Handle user interactions with routes and waypoints:

// Route click events
routingModule.events.mainLines.on('click', (feature, lngLat) => {
    console.log('Route clicked:', feature.properties);
    console.log('Coordinates:', lngLat);
});

// Waypoint events
routingModule.events.waypoints.on('click', (feature, lngLat) => {
    console.log('Waypoint:', feature.properties);
});

// Traffic incident events
routingModule.events.incidents.on('hover', (feature, lngLat) => {
    console.log('Traffic delay:', feature.properties.delayInSeconds);
});

// Turn-by-turn instruction events
routingModule.events.instructionLines.on('click', (feature, lngLat) => {
    console.log('Instruction properties:', feature.properties);
});

// Summary bubble events
routingModule.events.summaryBubbles.on('click', (feature, lngLat) => {
    console.log('Route summary:', feature.properties);
});

// Route section events
routingModule.events.ferries.on('click', (feature, lngLat) => {
    console.log('Ferry section');
});

// The `tollRoads` overlay draws the `tollRoad` sections — every stretch that costs money to drive,
// per-use tolls plus vignette-only motorways and urban charge zones
routingModule.events.tollRoads.on('click', (feature, lngLat) => {
    console.log('Charged road section');
});

routingModule.events.tunnels.on('click', (feature, lngLat) => {
    console.log('Tunnel section');
});

routingModule.events.vehicleRestricted.on('click', (feature, lngLat) => {
    console.log('Vehicle restricted section');
});

routingModule.events.chargingStops.on('click', (feature, lngLat) => {
    console.log('EV charging station');
});

// Remove event listeners
routingModule.events.mainLines.off('click', handler);

A hovered or clicked route draws its outline wider, selected or not, once a handler covers the routes. Put that state from your own UI with the module's event state methods, which act on the routes; the named scopes have them too, for their own features. A click marks the route, while selectRoute makes it the selected one:

routingModule.events.mainLines.on('click', (route) => routingModule.selectRoute(route.properties.index));

routingModule.putEventState({ index: 1, state: 'hover' });
const { click: [clickedRouteID] = [] } = routingModule.getEventStates();

highlight.outlineWidthFactor sets how much wider, 1.2 times unless set, live on the route style playground. It is clamped to ROUTE_HIGHLIGHT_OUTLINE_WIDTH_FACTOR_RANGE, 1 to 1.25, so the outline never covers a section halo drawn beneath the route, and 1 draws a hovered route as any other:

routingModule.applyConfig({ highlight: { outlineWidthFactor: 1.25 } });

A width you give the outline through layers.mainLines.routeOutline is drawn as given, in every state.

Multiple module instances

You can create multiple independent instances of the Routing module, each with its own configuration and styling. This is useful for comparing different route types or displaying routes for multiple users.

// Create separate instances for different route types
const carRoutes = await RoutingModule.create(map, { color: '#2ECC71' });
const truckRoutes = await RoutingModule.create(map, { color: '#E67E22' });

// Each instance manages its own routes independently
await carRoutes.showRoutes(carRoute);
await truckRoutes.showRoutes(truckRoute);

Reading shown data

getShown() returns what the module draws, as prepared for display and split by what draws it: the routes, the waypoints, and each section and overlay type:

const shown = routingModule.getShown();
console.log(`Showing ${shown.mainLines.features.length} routes`);
console.log(`Showing ${shown.waypoints.features.length} waypoints`);

Check whether any routes are currently displayed:

const shown = routingModule.getShown();
if (shown.mainLines.features.length > 0) {
    console.log('Routes are displayed');
}

The returned object includes: mainLines, waypoints, incidents, ferries, chargingStops, tollRoads, tunnels, vehicleRestricted, instructionLines, instructionArrows, summaryBubbles, and countryCrossings, plus one <type>Sections entry per generated section type — urbanSections, motorwaySections and the rest.

API reference

For complete documentation of all Routing Module properties, methods, and types, see the RoutingModule API Reference.

Related guides and examples

Services integration

Related examples

Related map modules