0

以下是我在 HTML 中使用 JQuery 实现的场景

  • 当用户双击表格单元格时，它应该在双击单元格内添加一个新输入 [完成]
  • 当用户 KeyPress [Tab] 并且它应该移动到下一个单元格 [Done]

在 2 场景的情况下，我需要dblclick()在下一个单元格上触发事件，该单元格在其中创建输入元素，但它无法在输入元素内聚焦。

我试图调试那种无法理解为什么会发生的场景。

我创建了一个按钮并编写了触发功能dblclick()，然后在输入元素内设置了焦点。

我无法理解用户何时使用鼠标单击/click()然后为什么将焦点设置在创建的输入元素上但为什么当我从代码中触发双击时没有发生同样的情况dblclick()

以下是相同的代码：

//Global Variables
var TabEdit_sourceInput = null;
var TabEdit_currentTd = null;
var TabEdit_DOMtocheck = null;
var TabEdit_previousHour = null;
var gridRefreshFlag = false;

//Init Double Click Event on the Table TD
$('.custom-table-td').dblclick(function(event){
    var tableId = $(this).attr('id');
    var inputId = 'input-'+tableId;
    $(this).html('<input id="input-'+tableId+'" placeholder="Type Message" class="form-control" onkeydown="return initCheckKeypress();" tabindex="1"/>');
    
    //Focusing on Generated Event
    $('#'+inputId).focus();

    //Binding the Focus Out Event to
    $('#'+inputId).focusout(function(){
        debugger;
        $('.header').html($(this).val());
     });
     
});

//Click Event to trigger dblclick on td with id = 'tableData1'
$('.btn-trigger-dbclick').click(function(){
    $('#tableData1').dblclick();
});

//Function to check Tab is Press or not
function initCheckKeypress(evt) {
    "use strict";
    var e = event || evt; // for trans-browser compatibility
    var charCode = e.which || e.keyCode;
    if (charCode === 9) {
        gridRefreshFlag = true;
        TabEdit_sourceInput = $(e.target);
        TabEdit_currentTd = TabEdit_sourceInput.parent();
        TabEdit_DOMtocheck = TabEdit_currentTd.next('td');
        movetoNextTD();
    }
}


//Code to Click on Next Cell
function movetoNextTD() {
    if (gridRefreshFlag && TabEdit_DOMtocheck !== null) {
        TabEdit_currentTd.html("");
        TabEdit_DOMtocheck.dblclick();
        resetmovetoNextVariable();
    }
}

//Reset Global Variable
function resetmovetoNextVariable(){
    TabEdit_sourceInput = null;
    TabEdit_currentTd = null;
    TabEdit_DOMtocheck = null;
    TabEdit_previousHour = null;
    gridRefreshFlag = false;
}
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Focus Issue</title>
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" >
</head>
<body>
    <div class="container">
        <div class="row">
            <div class="col-lg-6">
                <div class="header"></div>
                <table class="table table-bordered">
                    <tbody>
                        <tr id="tableRow1">
                            <th id="tableHeader1" class="custom-table-th">TH 1</th>
                            <th id="tableHeader2" class="custom-table-th">TH 2</th>
                            <th id="tableHeader3" class="custom-table-th">TH 3</th>
                        </tr>
                        <tr id="tableRow2">
                            <td id="tableData1" class="custom-table-td"></td>
                            <td id="tableData2" class="custom-table-td"></td>
                            <td id="tableData3" class="custom-table-td"></td>
                        </tr>
                    </tbody>
                </table>
                <button class="btn btn-primary btn-trigger-dbclick">Trigger</button>
            </div>
        </div>
    </div>
    <script src="https://code.jquery.com/jquery-3.4.1.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
</body>
</html>

4

2 回答 2

0

发生的事情是这样的：

  • 双击 - 生成第一个输入并设置焦点，很好
  • 用户按下选项卡 - 检查选项卡的代码在系统事件处理程序之前启动并创建第二个输入并设置焦点 - 系统然后继续默认选项卡操作并关闭第二个输入

修复方法是在创建第二个输入后取消系统默认事件：

e.preventDefault();

更新片段：

//Global Variables
var TabEdit_sourceInput = null;
var TabEdit_currentTd = null;
var TabEdit_DOMtocheck = null;
var TabEdit_previousHour = null;
var gridRefreshFlag = false;

//Init Double Click Event on the Table TD
$('.custom-table-td').dblclick(function(event){
    var tableId = $(this).attr('id');
    var inputId = 'input-'+tableId;
    $(this).html('<input id="input-'+tableId+'" placeholder="Type Message" class="form-control" onkeydown="return initCheckKeypress();" tabindex="1"/>');
    
    //Focusing on Generated Event
    $('#'+inputId).focus();

    //Binding the Focus Out Event to
    $('#'+inputId).focusout(function(){
        debugger;
        $('.header').html($(this).val());
     });
     
});

//Click Event to trigger dblclick on td with id = 'tableData1'
$('.btn-trigger-dbclick').click(function(){
    $('#tableData1').dblclick();
});

//Function to check Tab is Press or not
function initCheckKeypress(evt) {
    "use strict";
    var e = event || evt; // for trans-browser compatibility
    var charCode = e.which || e.keyCode;
    if (charCode === 9) {
        gridRefreshFlag = true;
        TabEdit_sourceInput = $(e.target);
        TabEdit_currentTd = TabEdit_sourceInput.parent();
        TabEdit_DOMtocheck = TabEdit_currentTd.next('td');
        movetoNextTD();
        e.preventDefault();
    }
}


//Code to Click on Next Cell
function movetoNextTD() {
    if (gridRefreshFlag && TabEdit_DOMtocheck !== null) {
        TabEdit_DOMtocheck.dblclick();
        TabEdit_currentTd.html("");
        resetmovetoNextVariable();
    }
}

//Reset Global Variable
function resetmovetoNextVariable(){
    TabEdit_sourceInput = null;
    TabEdit_currentTd = null;
    TabEdit_DOMtocheck = null;
    TabEdit_previousHour = null;
    gridRefreshFlag = false;
}
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Focus Issue</title>
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" >
</head>
<body>
    <div class="container">
        <div class="row">
            <div class="col-lg-6">
                <div class="header"></div>
                <table class="table table-bordered">
                    <tbody>
                        <tr id="tableRow1">
                            <th id="tableHeader1" class="custom-table-th">TH 1</th>
                            <th id="tableHeader2" class="custom-table-th">TH 2</th>
                            <th id="tableHeader3" class="custom-table-th">TH 3</th>
                        </tr>
                        <tr id="tableRow2">
                            <td id="tableData1" class="custom-table-td"></td>
                            <td id="tableData2" class="custom-table-td"></td>
                            <td id="tableData3" class="custom-table-td"></td>
                        </tr>
                    </tbody>
                </table>
                <button class="btn btn-primary btn-trigger-dbclick">Trigger</button>
            </div>
        </div>
    </div>
    <script src="https://code.jquery.com/jquery-3.4.1.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
</body>
</html>

于 2020-04-20T15:13:33.327 回答
0

更改您的 initCheckKeyPress 函数实现会有所帮助。我通过添加以下内容来防止触发事件的默认行为来解决此问题：

e.preventDefault();

这是因为“tab”按键事件的默认行为是关注下一个键项。这发生在输入创建之前（正如 Freedomn-m 正确突出显示的那样）。因此，防止这种情况会使这项工作奏效。

您的最终代码如下所示：

前

function initCheckKeypress(evt) {
"use strict";
var e = event || evt; // for trans-browser compatibility
var charCode = e.which || e.keyCode;
if (charCode === 9) {
    gridRefreshFlag = true;
    TabEdit_sourceInput = $(e.target);
    TabEdit_currentTd = TabEdit_sourceInput.parent();
    TabEdit_DOMtocheck = TabEdit_currentTd.next('td');
    movetoNextTD();
}}

后：

function initCheckKeypress(evt) {
"use strict";
var e = event || evt; 
e.preventDefault();// for trans-browser compatibility
var charCode = e.which || e.keyCode;
if (charCode === 9) {
    gridRefreshFlag = true;
    TabEdit_sourceInput = $(e.target);
    TabEdit_currentTd = TabEdit_sourceInput.parent();
    TabEdit_DOMtocheck = TabEdit_currentTd.next('td');
    movetoNextTD();

}}
于 2020-04-20T16:03:17.470 回答