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# Dashed Line Symbols (Polyline)

This example converts a polyline to a dashed line, by setting the opacity of the polyline to 0, and drawing an opaque symbol at a regular interval on the polyline.

Read the documentation.

### TypeScript

```// This example converts a polyline to a dashed line, by
// setting the opacity of the polyline to 0, and drawing an opaque symbol
// at a regular interval on the polyline.

function initMap(): void {
const map = new google.maps.Map(
document.getElementById("map") as HTMLElement,
{
zoom: 6,
center: { lat: 20.291, lng: 153.027 },
mapTypeId: "terrain"
}
);

// Define a symbol using SVG path notation, with an opacity of 1.
const lineSymbol = {
path: "M 0,-1 0,1",
strokeOpacity: 1,
scale: 4
};

// Create the polyline, passing the symbol in the 'icons' property.
// Give the line an opacity of 0.
// Repeat the symbol at intervals of 20 pixels to create the dashed effect.
const line = new google.maps.Polyline({
path: [
{ lat: 22.291, lng: 153.027 },
{ lat: 18.291, lng: 153.027 }
],
strokeOpacity: 0,
icons: [
{
icon: lineSymbol,
offset: "0",
repeat: "20px"
}
],
map: map
});
}index.ts```

### JavaScript

```// This example converts a polyline to a dashed line, by
// setting the opacity of the polyline to 0, and drawing an opaque symbol
// at a regular interval on the polyline.
function initMap() {
const map = new google.maps.Map(document.getElementById("map"), {
zoom: 6,
center: { lat: 20.291, lng: 153.027 },
mapTypeId: "terrain"
});
// Define a symbol using SVG path notation, with an opacity of 1.
const lineSymbol = {
path: "M 0,-1 0,1",
strokeOpacity: 1,
scale: 4
};
// Create the polyline, passing the symbol in the 'icons' property.
// Give the line an opacity of 0.
// Repeat the symbol at intervals of 20 pixels to create the dashed effect.
const line = new google.maps.Polyline({
path: [
{ lat: 22.291, lng: 153.027 },
{ lat: 18.291, lng: 153.027 }
],
strokeOpacity: 0,
icons: [
{
icon: lineSymbol,
offset: "0",
repeat: "20px"
}
],
map: map
});
}
index.js```

### CSS

```/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}

/* Optional: Makes the sample page fill the window. */
html,
body {
height: 100%;
margin: 0;
padding: 0;
}
style.css```

### HTML

```<!DOCTYPE html>
<html>
<head>
<title>Dashed Line Symbols (Polyline)</title>
<script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
<script
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
defer
></script>
<link rel="stylesheet" type="text/css" href="./style.css" />
<script src="./app.js"></script>
</head>
<body>
<div id="map"></div>
</body>
</html>sample.html```

### All

```<!DOCTYPE html>
<html>
<head>
<title>Dashed Line Symbols (Polyline)</title>
<script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
<script
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
defer
></script>
<style type="text/css">
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}

/* Optional: Makes the sample page fill the window. */
html,
body {
height: 100%;
margin: 0;
padding: 0;
}
</style>
<script>
"use strict";

// This example converts a polyline to a dashed line, by
// setting the opacity of the polyline to 0, and drawing an opaque symbol
// at a regular interval on the polyline.
function initMap() {
const map = new google.maps.Map(document.getElementById("map"), {
zoom: 6,
center: {
lat: 20.291,
lng: 153.027
},
mapTypeId: "terrain"
}); // Define a symbol using SVG path notation, with an opacity of 1.

const lineSymbol = {
path: "M 0,-1 0,1",
strokeOpacity: 1,
scale: 4
}; // Create the polyline, passing the symbol in the 'icons' property.
// Give the line an opacity of 0.
// Repeat the symbol at intervals of 20 pixels to create the dashed effect.

const line = new google.maps.Polyline({
path: [
{
lat: 22.291,
lng: 153.027
},
{
lat: 18.291,
lng: 153.027
}
],
strokeOpacity: 0,
icons: [
{
icon: lineSymbol,
offset: "0",
repeat: "20px"
}
],
map: map
});
}
</script>
</head>
<body>
<div id="map"></div>
</body>
</html>
inline.html```
"use strict"; // This example converts a polyline to a dashed line, by // setting the opacity of the polyline to 0, and drawing an opaque symbol // at a regular interval on the polyline. function initMap() { const map = new google.maps.Map(document.getElementById("map"), { zoom: 6, center: { lat: 20.291, lng: 153.027 }, mapTypeId: "terrain" }); // Define a symbol using SVG path notation, with an opacity of 1. const lineSymbol = { path: "M 0,-1 0,1", strokeOpacity: 1, scale: 4 }; // Create the polyline, passing the symbol in the 'icons' property. // Give the line an opacity of 0. // Repeat the symbol at intervals of 20 pixels to create the dashed effect. const line = new google.maps.Polyline({ path: [ { lat: 22.291, lng: 153.027 }, { lat: 18.291, lng: 153.027 } ], strokeOpacity: 0, icons: [ { icon: lineSymbol, offset: "0", repeat: "20px" } ], map: map }); }
/* Always set the map height explicitly to define the size of the div * element that contains the map. */ #map { height: 100%; } /* Optional: Makes the sample page fill the window. */ html, body { height: 100%; margin: 0; padding: 0; }
<!DOCTYPE html> <html> <head> <title>Dashed Line Symbols (Polyline)</title> <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script> <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBIwzALxUPNbatRBj3Xi1Uhp0fFzwWNBkE&callback=initMap&libraries=&v=weekly" defer ></script> <!-- jsFiddle will insert css and js --> </head> <body> <div id="map"></div> </body> </html>

## Create a starter application from sample

A skeleton starter application using TypeScript, Webpack, and Babel can be generated from this sample using one of the methods below.

### Run Locally

Node.js is required to run this sample locally. Follow these instructions to install Node.js and NPM.

````npm i -g '@googlemaps/js-samples'`
`googlemaps-js-samples init overlay-symbol-dashed DESTINATION_FOLDER`
```

### Run in Google Cloud Shell

Google Cloud Shell is an interactive shell environment for Google Cloud Platform that makes it easy for you to learn and experiment with GCP and manage your projects and resources from your web browser.