인포박스가 생성되지 않아요

업로드 페이지에서 마커를 클릭했을 때 인포박스가 생성되지 않습니다.

여러번 다시 해봤는데 그대로네요.. 무엇이 문제인지를 모르겠어요.

도움 요청합니다ㅠ

upload.js 코드입니다.

const mapContainer=document.getElementById("map");
const mapOption={
    center:new daum.maps.LatLng(37.554477,126.970419),
    level:3,
};

let map=new daum.maps.Map(mapContainer, mapOption);

let infoWindow = new daum.maps.InfoWindow({
    zIndex:1,
});

let markerList=[];

let ps=new daum.maps.services.Places();

searchPlaces();

function searchPlaces(){
    let keyword=$("#keyword").val();
    ps.keywordSearch(keyword,placesSearchCB);
}

function placesSearchCB(data, status){
    if(status===daum.maps.services.Status.OK){
        displayPlaces(data);
    }else if(status===daum.maps.services.Status.ZERO_RESULT){
        alert("검색 결과과 존재하지 않습니다.")
        return;
    }else if(status===daum.maps.services.Status.ERROR){
        alert("검색 결과중 오류가 발생했습니다.")
        return;
    }
}

function displayPlaces(data){
    let listEl=document.getElementById("placesList");
    let bounds=new daum.maps.LatLngBounds();

    removeAllChildNodes(listEl);
    removeMarker();


    for(let i=0;i<data.length;i++){
        let lat=data[i].y;
        let lng=data[i].x;
        let address_name=data[i]["address_name"];
        let place_name=data[i]["place_name"];

        const placePosition=new daum.maps.LatLng(lat,lng);
        bounds.extend(placePosition);
        let marker=new daum.maps.Marker({
            position:placePosition,

        });

        marker.setMap(map);
        markerList.push(marker);

        const el=document.createElement("div");
        const itemStr=`
        <div class="info">
            <div class="info_title">
                ${place_name}
            </div>
            <span>${address_name}</span>
        </div>
        `;

        el.innerHTML=itemStr;
        el.className="item";

        daum.maps.event.addListener(marker,"click",function(){
            displayInfowindow(marker,place_name,address_name,lat,lng);
        });

        daum.maps.event.addListener(map,"click",function(){
            infoWindow.close();
        });

        el.onclick=function(){
            displayInfowindow(marker,place_name,address_name,lat,lng);
        };

        listEl.appendChild(el);
    }
    map.setBounds(bounds);
}

function displayInfowindow(marker,place_name,address_name,lat,lng){
    let content=`
    <div style="padding:25px;">
    ${place_name}<br>
    ${address_name}<br>
    <button>onClick="onSubmit('${title}','${address}',${lat},${lng});"등록</button>
    </div>
    `;
    map.panTo(marker.getPosition());
    infoWindow.setContent(content);
    infoWindow.open(map,marker);

}

function onSubmit(title,address,lat,lng){
    $.ajax({
        url:"/location",
        data:{title,address,lat,lng},
        type:"POST",
    }).done((response)=>{
        console.log("데이터 요청 성공");
        alert("성공");
    }).fail((error)=>{
        console.log("데이터 실패");
        alert("실패");
    });
}


function removeAllChildNodes(el){
    while(el.hasChildNodes()){
        el.removeChild(el.lastChild);
    }
}

function removeMarker(){
    for(let i=0;i<markerList.length;i++){
        markerList[i].setMap(null);
    }
    markerList=[];
}