原生JS拖拽

想要讓整個元素移動需要三個事件：

        滑鼠按下 onm ousedown
        滑鼠移動 onm ousemove
        滑鼠抬起 onm ouseup

HTML

<div id="login" >
	<!-- 點擊title拖拽 -->
        <div id="title" >登錄會員
    <!-- title end -->
            <span><a id="closeBtn" href="javascript:void(0);" >關閉</a></span>
        </div>
        <div >
            <div >
                <label>用戶名：</label>
                <input type="text" placeholder="請輸入用戶名" name="info[username]" id="username" >
            </div>
            <div >
                <label>登錄密碼：</label>
                <input type="password" placeholder="請輸入登錄密碼" name="info[password]" id="password" >
            </div>
        </div>
        <div id="loginBtn" ><a href="javascript:void(0);" id="login-button-submit">登錄會員</a></div>
    </div>

頁面效果如下：

JS

var login = document.querySelector('.login');//獲取整個彈框的內容
var title = document.querySelector('#title');
    title.addEventListener('mousedown',function(e){
        //當按下滑鼠的時候，獲取到滑鼠在拖拽盒子內的坐標
        //滑鼠在頁面的坐標 - 大盒子距離瀏覽器左側的距離
        var x = e.pageX - login.offsetLeft;
        var y = e.pageY - login.offsetTop;

        //滑鼠移動
        document.addEventListener('mousemove',move);

        function move(e){
        //拖拽的盒子定位=滑鼠在頁面的坐標 - 滑鼠在拖拽盒子的坐標
            login.style.left = e.pageX - x + 'px';
            login.style.top = e.pageY - y + 'px';
        }

        //當滑鼠抬起的時候，將移動事件洗掉
        document.addEventListener('mouseup',function(){
            document.removeEventListener('mousemove',move);
        })

    })

CSS

<style>
	   *{
            padding: 0px;
            margin: 0px;
        }
        .login {
            display: block;
            width: 512px;
            height: 280px;
            position: fixed;
            border: #ebebeb solid 1px;
            left: 50%;
            top: 50%;
            background: #ffffff;
            box-shadow: 0px 0px 20px #ddd;
            z-index: 9999;
            transform: translate(-50%, -50%);
        }
        .login-title {
            width: 100%;
            margin: 10px 0px 0px 0px;
            text-align: center;
            line-height: 40px;
            height: 40px;
            font-size: 18px;
            position: relative;
            cursor: move;
        }
        .login-input-content {
            margin-top: 20px;
        }
        .login-button {
            width: 50%;
            margin: 30px auto 0px auto;
            line-height: 40px;
            font-size: 14px;
            border: #ebebeb 1px solid;
            text-align: center;
        }
        .login-bg {
            display: none;
            width: 100%;
            height: 100%;
            position: fixed;
            top: 0px;
            left: 0px;
            background: rgba(0, 0, 0, .3);
        }
        a {
            text-decoration: none;
            color: #000000;
        }
        .login-button a {
            display: block;
        }
        .login-input input.list-input {
            float: left;
            line-height: 35px;
            height: 35px;
            width: 350px;
            border: #ebebeb 1px solid;
            text-indent: 5px;
        }
        .login-input {
            overflow: hidden;
            margin: 0px 0px 20px 0px;
        }
        .login-input label {
            float: left;
            width: 90px;
            padding-right: 10px;
            text-align: right;
            line-height: 35px;
            height: 35px;
            font-size: 14px;
        }
        .login-title span {
            position: absolute;
            font-size: 12px;
            right: -20px;
            top: -30px;
            background: #ffffff;
            border: #ebebeb solid 1px;
            width: 40px;
            height: 40px;
            border-radius: 20px;
        }
</style>

 轉載于：https://blog.csdn.net/weixin_47300932/article/details/110405164

標籤：其他

上一篇：前端優化的方向

下一篇：CSS3+JS完美實作放大鏡模式