How to use JS and Baidu Maps to implement map location information display function

How to use JS and Baidu Maps to implement map location information display function

With the development of the Internet, map applications have become an indispensable part of our lives. Map apps on your phone are often used to find destinations, route planning and other functions. In web development, we can also use JS and Baidu Map API to display map location information. This article will introduce in detail how to use JS and Baidu Map API to implement this function, and give specific code examples.

First of all, we need to introduce the JS file of Baidu Map into the web page. You can introduce the JS file of Baidu Map by adding the following code to the head part of the web page:

<script type="text/javascript" src="https://api.map.baidu.com/api?v=2.0&ak=你的百度地图API密钥"></script>

In the above code, v=2.0 indicates the version number of the Baidu Map API, ak=your Baidu Map API key Indicates the API key you applied for on the Baidu Map Open Platform.

Next, we need to create a container in the web page to display the map. You can add the following code to the body part:

<div id="map" style="width: 100%; height: 400px;"></div>

In the above code, the div element with the id "map" is the container used to display the map. The map container can be resized by setting the style attribute.

Then, we need to write JS code to implement the display function of map location information. You can add the following code to the script tag:

// 创建地图实例
var map = new BMap.Map("map");

// 设置中心点坐标和地图级别
var point = new BMap.Point(116.404, 39.915);
map.centerAndZoom(point, 15);

// 添加地图控件
map.addControl(new BMap.NavigationControl());

// 添加标记物
var marker = new BMap.Marker(point);
map.addOverlay(marker);

// 添加信息窗口
var infoWindow = new BMap.InfoWindow("这是一个示例信息窗口");
marker.addEventListener("click", function(){
    this.openInfoWindow(infoWindow);
});

In the above code, a map instance is first created, and then the map is initialized by setting the center point coordinates and map level. Next, a map control is added to zoom the map. Then, mark the location by creating a marker and adding it to the map. Finally, display the location details by adding an information window and setting the marker's click event.

Finally, add the following code to the HTML file to call the JS code written above and display the map:

<script>
    function initMap() {
        // 编写以上的JS代码
    }
    window.onload = initMap;
</script>

In the above code, we called the initMap function in the window.onload event , this function is used to initialize the map and display location information.

At this point, we have completed the code writing using JS and Baidu Map API to implement the map location information display function. The above code can be modified and expanded according to actual needs to meet different functional requirements and display effects.

To sum up, this article introduces how to use JS and Baidu Map API to implement the map location information display function, and gives specific code examples. I hope this article can be helpful to readers in implementing map functions in web development.

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