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Custom Controls

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Page Summary

This example demonstrates how to create a custom control on a Google Map that recenters the map to Chicago.
The control is a button labeled "Center Map" and is positioned at the top center of the map.
When clicked, the button triggers a function to set the map's center to the coordinates of Chicago.
This example uses TypeScript and JavaScript to create the custom control and integrate it with the Google Maps API.

This example creates a map with a "Center Map" button, which will pan the map to be centered on Chicago.

Read the documentation.

[フレーム]

TypeScript

letmap:google.maps.Map;
constchicago={lat:41.85,lng:-87.65};
/**
 * Creates a control that recenters the map on Chicago.
 */
functioncreateCenterControl(map){
constcontrolButton=document.createElement('button');
// Set CSS for the control.
controlButton.style.backgroundColor='#fff';
controlButton.style.border='2px solid #fff';
controlButton.style.borderRadius='3px';
controlButton.style.boxShadow='0 2px 6px rgba(0,0,0,.3)';
controlButton.style.color='rgb(25,25,25)';
controlButton.style.cursor='pointer';
controlButton.style.fontFamily='Roboto,Arial,sans-serif';
controlButton.style.fontSize='16px';
controlButton.style.lineHeight='38px';
controlButton.style.margin='8px 0 22px';
controlButton.style.padding='0 5px';
controlButton.style.textAlign='center';
controlButton.textContent='Center Map';
controlButton.title='Click to recenter the map';
controlButton.type='button';
// Setup the click event listeners: simply set the map to Chicago.
controlButton.addEventListener('click',()=>{
map.setCenter(chicago);
});
returncontrolButton;
}
functioninitMap(){
map=newgoogle.maps.Map(document.getElementById('map')asHTMLElement,{
zoom:12,
center:chicago,
});
// Create the DIV to hold the control.
constcenterControlDiv=document.createElement('div');
// Create the control.
constcenterControl=createCenterControl(map);
// Append the control to the DIV.
centerControlDiv.appendChild(centerControl);
map.controls[google.maps.ControlPosition.TOP_CENTER].push(centerControlDiv);
}
declareglobal{
interfaceWindow{
initMap:()=>void;
}
}
window.initMap=initMap;index.ts

JavaScript

letmap;
constchicago={lat:41.85,lng:-87.65};
/**
 * Creates a control that recenters the map on Chicago.
 */
functioncreateCenterControl(map){
constcontrolButton=document.createElement("button");
// Set CSS for the control.
controlButton.style.backgroundColor="#fff";
controlButton.style.border="2px solid #fff";
controlButton.style.borderRadius="3px";
controlButton.style.boxShadow="0 2px 6px rgba(0,0,0,.3)";
controlButton.style.color="rgb(25,25,25)";
controlButton.style.cursor="pointer";
controlButton.style.fontFamily="Roboto,Arial,sans-serif";
controlButton.style.fontSize="16px";
controlButton.style.lineHeight="38px";
controlButton.style.margin="8px 0 22px";
controlButton.style.padding="0 5px";
controlButton.style.textAlign="center";
controlButton.textContent="Center Map";
controlButton.title="Click to recenter the map";
controlButton.type="button";
// Setup the click event listeners: simply set the map to Chicago.
controlButton.addEventListener("click",()=>{
map.setCenter(chicago);
});
returncontrolButton;
}
functioninitMap(){
map=newgoogle.maps.Map(document.getElementById("map"),{
zoom:12,
center:chicago,
});
// Create the DIV to hold the control.
constcenterControlDiv=document.createElement("div");
// Create the control.
constcenterControl=createCenterControl(map);
// Append the control to the DIV.
centerControlDiv.appendChild(centerControl);
map.controls[google.maps.ControlPosition.TOP_CENTER].push(centerControlDiv);
}
window.initMap=initMap;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

<html>
 <head>
 <title>Custom Controls</title>
 <link rel="stylesheet" type="text/css" href="./style.css" />
 <script type="module" src="./index.js"></script>
 </head>
 <body>
 <div id="map"></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>index.html

Clone Sample

Git and Node.js are required to run this sample locally. Follow these instructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application.

gitclone-bsample-control-customhttps://github.com/googlemaps/js-samples.git
cdjs-samples
npmi
npmstart

Other samples can be tried by switching to any branch beginning with sample-SAMPLE_NAME.

gitcheckoutsample-SAMPLE_NAME
npmi
npmstart