Dark horse programmer-dynamic table (deleted part)

1. The whole idea: use html, css, javascript to realize dynamic tables (add and delete functions).

Get a tag
Perform delete operation

2. According to the web page effect and html code, it is difficult to obtain the a tag alone . Therefore, directly add the attribute onclick to the a tag, and the delete operation can be performed by calling the delete method

3. Deletion method: Obviously, only the tr corresponding to the a tag needs to be deleted. The table can be found through the parent node of the a label.. Similarly, find tr tags. Finally, use the removeChild() method to delete tr: namely:

table.removeChild(tr);

4. Delete method code:

function delTr(obj) {
                    var table = obj.parentNode.parentNode.parentNode;
                    var tr=obj.parentNode.parentNode;
                    table.removeChild(tr);
                }

5. Finally, don't forget to set the onclick attribute to the newly added a tag.

6. The complete code of the dynamic form:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        table {
            border: 1px solid;
            margin: auto;
            width: 500px;

        }
        td,th {
            border: 1px solid;
            text-align: center;

        }
        div {
            text-align: center;
            margin: 50px;
        }
    </style>
</head>
<body>
            <div>
                <input type="text" id="id" placeholder="请输入编号">
                <input type="text" id="name" placeholder="请输入姓名">
                <input type="text" id="gender" placeholder="请输入性别">
                <input type="button" id="btn_add" value="添加">
            </div>
            <table cellspacing="0">
                <caption>学生信息表</caption>
                <tr>
                    <th>编号</th>
                    <th>姓名</th>
                    <th>性别</th>
                    <th>操作</th>
                </tr>
                <tr>
                    <td>1</td>
                    <td>令狐冲</td>
                    <td>男</td>
                    <td><a href="javascript:void(0);" onclick="delTr(this)">删除</a></td>
                </tr>
                <tr>
                    <td>2</td>
                    <td>任我行</td>
                    <td>男</td>
                    <td><a href="javascript:void(0);" onclick="delTr(this)">删除</a></td>
                </tr>
                <tr>
                    <td>3</td>
                    <td>岳不群</td>
                    <td>？</td>
                    <td><a href="javascript:void(0);" onclick="delTr(this)">删除</a></td>
                </tr>
            </table>
            
            

            <script>
                var btn_add = document.getElementById("btn_add");
                btn_add.onclick=function () {
                    var id = document.getElementById("id").value;  //获取内容
                    var name = document.getElementById("name").value;
                    var gender = document.getElementById("gender").value;
                //    创建td
                    var td_id = document.createElement("td");
                    var text_id = document.createTextNode(id);
                    td_id.appendChild(text_id);

                    var td_name = document.createElement("td");
                    var text_name = document.createTextNode(name);
                    td_name.appendChild(text_name);

                    var td_gender = document.createElement("td");
                    var text_gender = document.createTextNode(gender);
                    td_gender.appendChild(text_gender);

                    var td_a=document.createElement("td");
                    var ele_a=document.createElement("a");
                    ele_a.setAttribute("href","javascript:void(0);");
                    ele_a.setAttribute("onclick","delTr(this)");
                    var text_a = document.createTextNode("删除");
                    ele_a.appendChild(text_a);
                    td_a.appendChild(ele_a);
                //    创建tr
                    var tr = document.createElement("tr");
                //    添加td
                    tr.appendChild(td_id);
                    tr.appendChild(td_name);
                    tr.appendChild(td_gender);
                    tr.appendChild(td_a);
                //    获取table
                    var table = document.getElementsByTagName("table")[0];
                    table.appendChild(tr);
                }

                function delTr(obj) {
                    var table = obj.parentNode.parentNode.parentNode; //父亲的父亲的父亲就是table
                    var tr=obj.parentNode.parentNode; //a的父亲是td,td的父亲就是tr
                    table.removeChild(tr);
                }

                var del_a = document.getElementsByTagName("a");

            </script>
</body>
</html>

Dark horse programmer-dynamic table (deleted part)

Dark horse programmer-dynamic table (deleted part)

Guess you like