jquery鼠标拖拽实现

<script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>

<div id="dragElement">这是一个可拖拽的元素。</div>

<style>
    #dragElement {
        width: 100px;
        height: 100px;
        background-color: yellow;
        position: absolute;
        left: 50%;
        top: 50%;
        margin-left: -50px;
        margin-top: -50px;
    }
</style>

$(function() {
    var isDragging = false;
    var currentX;
    var currentY;
    var initialX;
    var initialY;
    var xOffset = 0;
    var yOffset = 0;
    
    $('#dragElement').mousedown(function(e) {
        initialX = e.clientX - xOffset;
        initialY = e.clientY - yOffset;

        if (e.target === this) {
            isDragging = true;
        }
    });

    $(document).mousemove(function(e) {
        if (isDragging) {
            e.preventDefault();

            currentX = e.clientX - initialX;
            currentY = e.clientY - initialY;

            xOffset = currentX;
            yOffset = currentY;

            setTranslate(currentX, currentY, $('#dragElement'));
        }
    });

    $(document).mouseup(function(e) {
        initialX = currentX;
        initialY = currentY;

        isDragging = false;
    });

    function setTranslate(xPos, yPos, el) {
        el.css('transform', 'translate3d(' + xPos + 'px, ' + yPos + 'px, 0)');
    }
});

<style>
    #dragElement {
        cursor: move;
    }
</style>