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醉卧古藤阴下，了不知南北。
【宋代】秦观《好事近·梦中作》

Draggable 拖拽实例

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<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>课程表拖拽</title>
        <style type="text/css">
            h1 {
                text-align: center;
            }
 
            .container {
                display: flex;
            }
 
            .left {
                background: #eee;
                height: 550px;
                width: 100px;
            }
            .left div{
                margin: 10px;
            }
 
            .item {
                text-align: center;
                color: white;
                cursor: pointer;
                width: 80px;
                height: 30px;
                line-height: 30px;
            }
 
            .right {
                background: #eee;
                width: calc(100% - 100px);
                margin-left: 20px;
                padding: 10px;
            }
 
            .color1 {
                background: #BA55D3;
            }
 
            .color2 {
                background: #BC8F8F;
            }
 
            .color3 {
                background: #B8860B;
            }
 
            .color4 {
                background: #B22222;
            }
 
            .color5 {
                background: #B0E0E6;
            }
 
            .color6 {
                background: #ADFF2F;
            }
 
            .color7 {
                background: #9932CC;
            }
 
            .color8 {
                background: #DB7093;
            }
 
            .color9 {
                background: #87CEFA;
            }
             
            .color10 {
                background: #32CD32;
            }
             
            .color11 {
                background: #0000CD;
            }
 
            table {
                text-align: center;
                border-collapse: collapse;
                margin: 0 auto;
                border: 1px solid #696969;
            }
 
            table tr th {
                border: 1px solid #696969;
                padding: 15px;
                background: #DCDCDC;
                font-weight: bold;
                color: #000;
            }
 
            table td {
                border: 1px solid #696969;
                width: 100px;
                height: 50px;
            }
 
            .ths {
                border-top: 1px solid #eee;
                border-left: 1px solid #eee;
                background: none;
            }
 
            .drop-over {
                background: #696969;
            }
        </style>
    </head>
    <body>
        <h1>课程表拖拽</h1>
        <div class="container">
            <div class="left" data-drop="move">
                <div draggable="true" data-effect="copy" class="color1 item">语文</div>
                <div draggable="true" data-effect="copy" class="color2 item">数学</div>
                <div draggable="true" data-effect="copy" class="color3 item">英语</div>
                <div draggable="true" data-effect="copy" class="color4 item">物理</div>
                <div draggable="true" data-effect="copy" class="color5 item">化学</div>
                <div draggable="true" data-effect="copy" class="color6 item">生物</div>
                <div draggable="true" data-effect="copy" class="color7 item">政治</div>
                <div draggable="true" data-effect="copy" class="color8 item">历史</div>
                <div draggable="true" data-effect="copy" class="color9 item">地理</div>
                <div draggable="true" data-effect="copy" class="color10 item">音乐</div>
                <div draggable="true" data-effect="copy" class="color11 item">体育</div>
            </div>
            <div class="right">
                <table border="1">
                    <tr>
                        <th class="ths"></th>
                        <th>星期一</th>
                        <th>星期二</th>
                        <th>星期三</th>
                        <th>星期四</th>
                        <th>星期五</th>
                        <th>星期六</th>
                        <th>星期日</th>
                    </tr>
                    <tr  align="center" valign="middle">
                        <td rowspan="4" style="background: #DCDCDC;">
                            上
                            <br>
                            <br>
                            午
                        </td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                    </tr>
                    <tr  align="center" valign="middle">
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                    </tr>
                    <tr  align="center" valign="middle">
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                    </tr>
                    <tr  align="center" valign="middle">
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                    </tr>
                    <tr  align="center" valign="middle">
                        <td style="border-left: 1px solid #eee;border-right: 1px solid #eee;" colspan="8">
                            午休
                        </td>
                    </tr>
                    <tr  align="center" valign="middle">
                        <td rowspan="4" style="background: #DCDCDC;">
                            下
                            <br>
                            <br>
                            午
                        </td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                    </tr>
                    <tr  align="center" valign="middle">
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                    </tr>
                    <tr  align="center" valign="middle">
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                    </tr>
                    <tr  align="center" valign="middle">
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                        <td data-drop="copy"></td>
                    </tr>
                </table>
            </div>
        </div>
    </body>
    <script src="js/project.js"></script>
</html>

 

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const container = document.querySelector(".container");
 
let source;
container.ondragstart = (e) => {
    e.dataTransfer.effectAllowed = e.target.dataset.effect;
    source = e.target;
}
 
function clearStyles() {
    document.querySelectorAll('.drop-over').forEach((node) => {
        node.classList.remove('drop-over');
    })
}
 
function getDropNode(node) {
    while (node) {
        if (node.dataset && node.dataset.drop) {
            return node;
        }
        node = node.parentNode;
    }
}
 
 
container.ondragover = (e) => {
    e.preventDefault();
    // console.log("over",e.target);
}
 
container.ondragenter = (e) => {
    clearStyles();
    const dropNode = getDropNode(e.target);
    if (!dropNode) {
        return;
    }
    if (source.dataset.effect === dropNode.dataset.drop) {
        dropNode.classList.add("drop-over");
    }
}
 
container.ondrop = (e) => {
    // console.log("drop",e.target);
    const dropNode = getDropNode(e.target);
    if (!dropNode) {
        return;
    }
    if (source.dataset.effect !== dropNode.dataset.drop) {
        return;
    }
    clearStyles();
    if (dropNode.dataset.drop === 'copy') {
        const cloned = source.cloneNode(true);
        cloned.dataset.effect = 'move';
        dropNode.innerHTML = '';
        dropNode.appendChild(cloned);
    } else {
        source.remove();
    }
}

　　

posted @   小珍珠在河里敲代码  阅读(26)  评论(0)  编辑  收藏  举报
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