jquery personal information addition, deletion, modification check

jQuery is a convenient and fast Javascript library, often used to handle interaction, event processing and animation effects of HTML documents. This article will introduce how to use jQuery to implement the function of adding, deleting, modifying and checking personal information.

1. Preparation

First, you need an HTML table containing personal information, which can be written manually or generated using a template engine. Assume that our table contains the following column headers and data:

<table id="info-table">
    <thead>
        <tr>
            <th>ID</th>
            <th>姓名</th>
            <th>性别</th>
            <th>年龄</th>
            <th>联系方式</th>
            <th>操作</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>1</td>
            <td>张三</td>
            <td>男</td>
            <td>25</td>
            <td>138****1234</td>
            <td>
                <button class="edit-btn">编辑</button>
                <button class="delete-btn">删除</button>
            </td>
        </tr>
        <tr>
            <td>2</td>
            <td>李四</td>
            <td>女</td>
            <td>30</td>
            <td>139****5678</td>
            <td>
                <button class="edit-btn">编辑</button>
                <button class="delete-btn">删除</button>
            </td>
        </tr>
        ...
    </tbody>
</table>

Secondly, a form is needed for adding and editing information. You can use HTML to build a form, for example:

<form id="info-form">
    <input type="hidden" id="info-id" value="">
    <div>
        <label for="info-name">姓名：</label>
        <input type="text" id="info-name" name="name" required="required">
    </div>
    <div>
        <label for="info-gender">性别：</label>
        <input type="radio" id="info-gender-male" name="gender" value="male" required="required">
        <label for="info-gender-male">男</label>
        <input type="radio" id="info-gender-female" name="gender" value="female" required="required">
        <label for="info-gender-female">女</label>
    </div>
    <div>
        <label for="info-age">年龄：</label>
        <input type="number" id="info-age" name="age" required="required">
    </div>
    <div>
        <label for="info-phone">联系方式：</label>
        <input type="tel" id="info-phone" name="phone" required="required">
    </div>
    <div>
        <button type="submit" id="submit-btn">提交</button>
        <button type="button" id="cancel-btn">取消</button>
    </div>
</form>

Among them, the hidden field with the id "info-id" is used to record the ID of the information being edited. If the value is empty, it means that the current operation is to add, and if it is not empty, it means This is currently an editing operation.

2. Add information

The operation of adding information is relatively simple. You only need to listen to the submit event of the form, obtain the form data and insert it into the table. The specific steps are as follows:

1. Listen to the submit event:

$('#info-form').on('submit', function(e) {
    e.preventDefault();
    // ...
});

2. Get the form data:

var formData = {
    name: $('#info-name').val(),
    gender: $('input[name="gender"]:checked').val(),
    age: $('#info-age').val(),
    phone: $('#info-phone').val()
};

3. Insert into the table ：

var newRow = $('<tr>')
    .append($('<td>').text(newId))
    .append($('<td>').text(formData.name))
    .append($('<td>').text(formData.gender === 'male' ? '男' : '女'))
    .append($('<td>').text(formData.age))
    .append($('<td>').text(formData.phone))
    .append($('<td>')
        .append($('<button>').addClass('edit-btn').text('编辑'))
        .append($('<button>').addClass('delete-btn').text('删除'))
    );
$('#info-table tbody').append(newRow);

Among them, newId is the ID of the newly added information, which needs to be generated based on the maximum ID of the current table plus 1.

3. Edit information

The operation of editing information is slightly more complicated than the operation of adding. You need to first locate the information to be edited in the form, then fill in its data into the form, and monitor the form. The submit event will update the original data in the table after the update is completed. The specific steps are as follows:

1. Listen to the click event of the edit button:

$('#info-table').on('click', '.edit-btn', function() {
    var row = $(this).closest('tr');
    var id = row.find('td:first-child').text();
    var name = row.find('td:nth-child(2)').text();
    var gender = row.find('td:nth-child(3)').text() === '男' ? 'male' : 'female';
    var age = row.find('td:nth-child(4)').text();
    var phone = row.find('td:nth-child(5)').text();
    $('#info-id').val(id);
    $('#info-name').val(name);
    $('input[name="gender"][value="' + gender + '"]').prop('checked', true);
    $('#info-age').val(age);
    $('#info-phone').val(phone);
    $('#submit-btn').text('更新');
});

2. Listen to the submit event of the form:

$('#info-form').on('submit', function(e) {
    e.preventDefault();
    var id = $('#info-id').val();
    var formData = {
        name: $('#info-name').val(),
        gender: $('input[name="gender"]:checked').val(),
        age: $('#info-age').val(),
        phone: $('#info-phone').val()
    };
    var row = $('#info-table').find('td:first-child').filter(function() {
        return $(this).text() === id;
    }).closest('tr');
    row.find('td:nth-child(2)').text(formData.name);
    row.find('td:nth-child(3)').text(formData.gender === 'male' ? '男' : '女');
    row.find('td:nth-child(4)').text(formData.age);
    row.find('td:nth-child(5)').text(formData.phone);
    $('#info-id').val('');
    $('#info-name').val('');
    $('input[name="gender"]').prop('checked', false);
    $('#info-age').val('');
    $('#info-phone').val('');
    $('#submit-btn').text('添加');
});

Among them , use the find, filter and closest methods to locate the row that needs to be edited, and use the find method again to obtain the data for each column in the row.

4. Deleting information

Deleting information is relatively simple. You only need to confirm whether to delete it when clicking the delete button, and remove the corresponding row from the table. The specific steps are as follows:

1. Listen to the click event of the delete button:

$('#info-table').on('click', '.delete-btn', function() {
    var row = $(this).closest('tr');
    if (confirm('确定要删除该信息吗？')) {
        row.remove();
    }
});

Among them, use the closest method to get the current row, and use the remove method to move it from the DOM tree remove.

So far, we have completed the function of adding, deleting, modifying and checking personal information. The complete code example is as follows:

$(function() {
    $('#info-table').on('click', '.edit-btn', function() {
        var row = $(this).closest('tr');
        var id = row.find('td:first-child').text();
        var name = row.find('td:nth-child(2)').text();
        var gender = row.find('td:nth-child(3)').text() === '男' ? 'male' : 'female';
        var age = row.find('td:nth-child(4)').text();
        var phone = row.find('td:nth-child(5)').text();
        $('#info-id').val(id);
        $('#info-name').val(name);
        $('input[name="gender"][value="' + gender + '"]').prop('checked', true);
        $('#info-age').val(age);
        $('#info-phone').val(phone);
        $('#submit-btn').text('更新');
    });
    
    $('#info-form').on('submit', function(e) {
        e.preventDefault();
        var id = $('#info-id').val();
        var formData = {
            name: $('#info-name').val(),
            gender: $('input[name="gender"]:checked').val(),
            age: $('#info-age').val(),
            phone: $('#info-phone').val()
        };
        if (id === '') {
            var newId = parseInt($('#info-table').find('td:first-child')
                .map(function() { return $(this).text(); }).get()
                .reduce(function(prev, curr) { return parseInt(prev) > parseInt(curr) ? prev : curr; })) + 1;
            var newRow = $('<tr>')
                .append($('<td>').text(newId))
                .append($('<td>').text(formData.name))
                .append($('<td>').text(formData.gender === 'male' ? '男' : '女'))
                .append($('<td>').text(formData.age))
                .append($('<td>').text(formData.phone))
                .append($('<td>')
                    .append($('<button>').addClass('edit-btn').text('编辑'))
                    .append($('<button>').addClass('delete-btn').text('删除'))
                );
            $('#info-table tbody').append(newRow);
        } else {
            var row = $('#info-table').find('td:first-child').filter(function() {
                return $(this).text() === id;
            }).closest('tr');
            row.find('td:nth-child(2)').text(formData.name);
            row.find('td:nth-child(3)').text(formData.gender === 'male' ? '男' : '女');
            row.find('td:nth-child(4)').text(formData.age);
            row.find('td:nth-child(5)').text(formData.phone);
            $('#info-id').val('');
            $('#info-name').val('');
            $('input[name="gender"]').prop('checked', false);
            $('#info-age').val('');
            $('#info-phone').val('');
            $('#submit-btn').text('添加');
        }
    });
    
    $('#info-table').on('click', '.delete-btn', function() {
        var row = $(this).closest('tr');
        if (confirm('确定要删除该信息吗？')) {
            row.remove();
        }
    });
    
    $('#cancel-btn').on('click', function() {
        $('#info-id').val('');
        $('#info-name').val('');
        $('input[name="gender"]').prop('checked', false);
        $('#info-age').val('');
        $('#info-phone').val('');
        $('#submit-btn').text('添加');
    });
});

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