Preface

1.marker points and information forms
Effect Show

(1) We need to prepare such a css style in advance.

html,
        body,
        #container {
            height: 98%;
            width: 100%;
        }

        .content-window-card {
            position: relative;
            box-shadow: none;
            bottom: 0;
            left: 0;
            width: auto;
            padding: 0;
        }

        .content-window-card p {
            height: 2rem;
        }

        .custom-info {
            border: solid 1px silver;
        }

        div.info-top {
            position: relative;
            background: none repeat scroll 0 0 #F9F9F9;
            border-bottom: 1px solid #CCC;
            border-radius: 5px 5px 0 0;
        }

        div.info-top div {
            display: inline-block;
            color: #333333;
            font-size: 14px;
            font-weight: bold;
            line-height: 31px;
            padding: 0 10px;
        }

        div.info-top img {
            position: absolute;
            top: 10px;
            right: 10px;
            transition-duration: 0.25s;
        }

        div.info-top img:hover {
            box-shadow: 0px 0px 5px #000;
        }

        div.info-middle {
            font-size: 12px;
            padding: 10px 6px;
            line-height: 20px;
        }

        div.info-bottom {
            height: 0px;
            width: 100%;
            clear: both;
            text-align: center;
        }

        div.info-bottom img {
            position: relative;
            z-index: 104;
        }

        span {
            margin-left: 5px;
            font-size: 11px;
        }

        .info-middle img {
            float: left;
            margin-right: 6px;
        }

(2) Next is the js file we need

/**  
 * Place maker with message box 
 * @param {*} obj Object Form
 * @param {*} obj.how  Which instance's map call
 * @param {*} obj.position  Map Location Point Array Form [lng,lat]
 * @param {*} obj.title     Header Title of Form
 * @param {*} obj.content   Form's internal information array form ex: If it's paragraph form, you need to separate paragraphs into array elements in turn.
 * @param {*} obj.flag      Tag Point Display Style Default false Blue
 */
function getAMarker(obj) {
    addMarker();
    //Add marker tags
    function addMarker() {
        if (obj.flag) {
            var icon = "https://webapi.amap.com/theme/v1.3/markers/n/mark_r.png";
        } else {
            var icon = "";
        }
        var marker = new AMap.Marker({
            map: obj.how,
            position: obj.position,
            icon: icon,
        });
        // Call Setup Form
        var infoWindow = setInfo(obj.title, obj.content)
        //Click marker to pop up a custom information form
        AMap.event.addListener(marker, 'click', function () {
            infoWindow.open(obj.how, marker.getPosition());
        });
    }

    // Set up the form we want
    function setInfo(title, content) {
        var infoWindow = new AMap.InfoWindow({
            isCustom: true, //Use custom forms
            content: createInfoWindow(title, content.join("<br/>")),
            offset: new AMap.Pixel(16, -45)
        });
        return infoWindow;
    }

    //Build a custom information form
    function createInfoWindow(title, content) {
        var info = document.createElement("div");
        info.className = "custom-info input-card content-window-card";

        //You can modify the width and height of your custom form in the following way
        info.style.width = "250px";
        // Define the top title
        var top = document.createElement("div");
        var titleD = document.createElement("div");
        var closeX = document.createElement("img");
        top.className = "info-top";
        titleD.innerHTML = title;
        closeX.src = "https://webapi.amap.com/images/close2.gif";
        closeX.onclick = closeInfoWindow;

        top.appendChild(titleD);
        top.appendChild(closeX);
        info.appendChild(top);

        // Define the central content
        var middle = document.createElement("div");
        middle.className = "info-middle";
        middle.style.backgroundColor = 'white';
        middle.innerHTML = content;
        info.appendChild(middle);

        // Define the bottom content
        var bottom = document.createElement("div");
        bottom.className = "info-bottom";
        bottom.style.position = 'relative';
        bottom.style.top = '0px';
        bottom.style.margin = '0 auto';
        var sharp = document.createElement("img");
        sharp.src = "https://webapi.amap.com/images/sharp.png";
        bottom.appendChild(sharp);
        info.appendChild(bottom);
        return info;
    }

    //Close the Information Form
    function closeInfoWindow() {
        obj.how.clearInfoWindow();
    }
}

(3) Information Format of Information Form
As long as there are paragraphs, they are written as array elements

var data = [{
    title: 'Changning Road<span style="font-size:11px;color:#F00; "> Price: 666 </span>',
    content: ["<img src='http://Tpc.google syndication.com/simgad/5843493769827749134'> Address: Changning Road,""Tel: 151-45561,"<a href='https://www.baidu.com'> Details </a>"
}]

(4) Call method

var map = new AMap.Map("container", {
            resizeEnable: true,
            center:[lng, lat],
            zoom: 13
        });
getAMarker({
            how: map,
            position: [lng, lat],
            title: data[0].title,
            content: data[0].content,
            flag: true
        });