js代码弹出框显示图片

alert('<img src="path/to/image.jpg" alt="Image Description">');

if (confirm('<img src="path/to/image.jpg" alt="Image Description">')) {
    // 用户点击了确定
} else {
    // 用户点击了取消
}

<div id="myModal" class="modal">
    <span class="close-button">&times;</span>
    <img class="modal-content" id="img01">
</div>

.modal {
    display: none; 
    position: fixed; 
    z-index: 1; 
    padding-top: 100px; 
    left: 0;
    top: 0;
    width: 100%;
    height: 100%; 
    overflow: auto;
    background-color: rgb(0,0,0); 
    background-color: rgba(0,0,0,0.9);
}

.close-button {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
}

.modal-content {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
}

// 获取模态框和关闭按钮的引用
var modal = document.getElementById("myModal");
var img = document.getElementById("img01");
var captionText = document.getElementById("caption");

// 当用户点击图片时，打开模态框
function openModal(src, alt) {
    img.src = src;
    captionText.innerHTML = alt;
    modal.style.display = "block";
}

// 当用户点击关闭按钮时，关闭模态框
var span = document.getElementsByClassName("close-button")[0];
span.onclick = function() { 
    modal.style.display = "none";
}

// 当用户点击模态框外部时，关闭模态框
window.onclick = function(event) {
    if (event.target == modal) {
        modal.style.display = "none";
    }
}