Encapsulate a pop-up window to facilitate multiple pages to call js

Package:

/ * * 
 * 
 Pop-up window with confirmation and cancellation * @param content pop-up content 
 * @param btnok Whether to show the button 
 * @param btncanel 
 * @param btnCallBack The callback function of the click button, true / false 
 * / 
function popup (content, btnok, btncanel, btnCallBack) { 
    let btnOkShow = "block" ; 
    let btnCanelShow = "block" ;
     if ( null == btnok || "" == btnok) { 
        btnOkShow = "none" ; 
    } 
    if ( null == btncanel || " "== btncanel) { 
        btnCanelShow =" none " ; 
    } 
    let str= '<div id="tipDialog" class="dialogBack" data-tag="">\n' +
        '    <div class="tck">\n' +
        '        <div class="topDiv">\n' +
        '            <div class="topnum">\n' +
        '                <img src="../../assets/US/icon/tips.png"  alt="">提示\n' +
        '            </div>\n' +
        '            <img class="closeIm" src="../../assets/US/buttons/close.png" id="closeTip"  alt="">\n' +
        '        </div>\n' +
        '\n' +
        '        <div class="contenT"><div id="dialogContent" class="sc">' + content + '</div></div>\n' +
        '        <div class="but1">\n' +
        '            <input id="sureButton" style="display: ' + btnOkShow + '" type="button" class="btn1"   value="' + btnok + '">\n' +
        '            <input id="cancleButton" style="display: ' + btnCanelShow + '" type="button" class="btn2"  value="' + btncanel + '">\n' +
        '        </div>\n' +
        '    </div>\n' +
        '</div>';
    $("body").append(str);
    let str1 = document.querySelector('.dialogBack');
    str1.style.display = "block";
    $("#closeTip").click(function () {
        $("#tipDialog").remove();
        if (null != btnCallBack) {
            btnCallBack(false);
        }
    })
    $("#sureButton").click(function () {
        $("#tipDialog").remove();
        if (null != btnCallBack) {
            btnCallBack(true);
        }
    })
    $("#cancleButton").click(function () {
        $("#tipDialog").remove();
        if (null != btnCallBack) {
            btnCallBack(false);
        }
    })
}

transfer:

  popup ("Are you sure you want to delete?", "OK", "Cancel", function (result) {
           if (result) { 
             console.log ( 1) // Click to confirm the operation method 
          } else { 
              console.log ( 2 ) // click cancel to operate method 
            } 
      })    

style:

.dialogBack {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 1999;
    background: rgba(0, 0, 0, 0.6);
}

.tck {
    width: 62%;
    background-color: #fff;
    text-align: center;
    align-content: center;
    position: fixed;
    font-family: 'SimHei', serif;
    left: 20%;
    top: 25%;
    color: #393937;
}

.topDiv {
    height: 37%;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.closeIm {
    width: 45px;
    height: 40px;
    margin-right: 40px;
}

.topnum {
    height: 100%;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    line-height: 89px;
    font-size: 2.6rem;
    margin-left: 30px;
    padding-top: 17px;
    /*position: relative;*/
}

.topnum img {
    /*position: absolute;*/
    /*left: 159px;*/
    /*top: 26px;*/
    width: 45px;
    height: 45px;
    margin-right: 10px;
}

.sc {
    width: 80%;
    color: #202020;
    line-height: 36px;
    font-size: 2.6rem;
    text-align: center;
    margin: 25px 0;
}

.contenT {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}
.but1 {
    height: 145px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.btn1 {
    width: 36%;
    height: 42%;
    font-size: 1.8rem;
    background-color: #e5e5e5;
    color: #222222;
    border: none;
}

.btn2 {
    width: 36%;
    height: 42%;
    margin-left: 29px;
    font-size: 1.8rem;
    background-color: #202020;
    color: #fbfbfb;
    border: none;
}

The above is a mask pop-up window style I encapsulated is as follows