Removing Polylines
Page Summary
This example demonstrates how to add and remove a polyline from a Google Map using JavaScript/TypeScript.
It provides UI controls (buttons) to trigger the addition and removal of the polyline.
The polyline is initialized with a predefined path and styling.
Users can interact with the controls to dynamically show or hide the polyline on the map.
The sample code includes HTML, CSS, and JavaScript/TypeScript components for implementation.
This example adds a UI control that allows the user to remove the polyline fromthe map.
Read thedocumentation.
TypeScript
// This example adds a UI control allowing users to remove the polyline from the// map.letflightPath:google.maps.Polyline;letmap:google.maps.Map;functioninitMap():void{map=newgoogle.maps.Map(document.getElementById("map")asHTMLElement,{zoom:3,center:{lat:0,lng:-180},mapTypeId:"terrain",});constflightPathCoordinates:google.maps.LatLngLiteral[]=[{lat:37.772,lng:-122.214},{lat:21.291,lng:-157.821},{lat:-18.142,lng:178.431},{lat:-27.467,lng:153.027},];flightPath=newgoogle.maps.Polyline({path:flightPathCoordinates,strokeColor:"#FF0000",strokeOpacity:1.0,strokeWeight:2,});// add event listener for click eventdocument.getElementById("add-line")!.addEventListener("click",addLine);document.getElementById("remove-line")!.addEventListener("click",removeLine);// initialize with lineaddLine();}functionaddLine():void{flightPath.setMap(map);}functionremoveLine():void{flightPath.setMap(null);}declareglobal{interfaceWindow{initMap:()=>void;}}window.initMap=initMap;
JavaScript
// This example adds a UI control allowing users to remove the polyline from the// map.letflightPath;letmap;functioninitMap(){map=newgoogle.maps.Map(document.getElementById("map"),{zoom:3,center:{lat:0,lng:-180},mapTypeId:"terrain",});constflightPathCoordinates=[{lat:37.772,lng:-122.214},{lat:21.291,lng:-157.821},{lat:-18.142,lng:178.431},{lat:-27.467,lng:153.027},];flightPath=newgoogle.maps.Polyline({path:flightPathCoordinates,strokeColor:"#FF0000",strokeOpacity:1.0,strokeWeight:2,});// add event listener for click eventdocument.getElementById("add-line").addEventListener("click",addLine);document.getElementById("remove-line").addEventListener("click",removeLine);// initialize with lineaddLine();}functionaddLine(){flightPath.setMap(map);}functionremoveLine(){flightPath.setMap(null);}window.initMap=initMap;
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;}#floating-panel{position:absolute;top:10px;left:25%;z-index:5;background-color:#fff;padding:5px;border:1pxsolid#999;text-align:center;font-family:"Roboto","sans-serif";line-height:30px;padding-left:10px;}
HTML
<html> <head> <title>Removing Polylines</title> <link rel="stylesheet" type="text/css" href="./style.css" /> <script type="module" src="./index.js"></script> </head> <body> <div> <input type="button" value="Remove line" /> <input type="button" value="Restore line" /> </div> <div></div> <!-- The `defer` attribute causes the script to execute after the full HTML document has been parsed. For non-blocking uses, avoiding race conditions, and consistent behavior across browsers, consider loading using Promises. See https://developers.google.com/maps/documentation/javascript/load-maps-js-api for more information. --> <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&v=weekly" defer ></script> </body></html>
Try Sample
Clone Sample
Git and Node.js are required to run this sample locally. Follow theseinstructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application.
gitclone-bsample-polyline-removehttps://github.com/googlemaps/js-samples.gitcdjs-samplesnpminpmstart
Other samples can be tried by switching to any branch beginning withsample-SAMPLE_NAME.
gitcheckoutsample-SAMPLE_NAMEnpminpmstart
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Last updated 2025-12-11 UTC.