jquery实现在光标位置插入内容的方法

前端技术 2023/09/07 JavaScript

本文实例讲述了jquery实现在光标位置插入内容的方法。分享给大家供大家参考。具体实现方法如下：

复制代码 代码如下:
<!DOCTYPE html> 
<html> 
<head> 
    <title>无标题页</title> 
    <script type=\"text/javascript\" src=\"jquery-1.7.2.min。js\"></script> 
    <script type=\"text/javascript\"> 
        (function ($) { 
            $.fn.extend({ 
                insertAtCaret: function (myValue) { 
                    var $t = $(this)[0]; 
                    if (document.selection) { 
                        this.focus(); 
                        sel = document.selection.createRange(); 
                        sel.text = myValue; 
                        this.focus(); 
                    } else 
                        if ($t.selectionStart || $t.selectionStart == \'0\')
   { 
                            var startPos = $t.selectionStart; 
                            var endPos = $t.selectionEnd; 
                            var scrollTop = $t.scrollTop; 
                            $t.value = $t.value.substring(0, startPos) + myValue + $t.value.substring(endPos,$t.value.length); 
                            this.focus(); 
                            $t.selectionStart = startPos + myValue.length;
                            $t.selectionEnd = startPos + myValue.length; 
                            $t.scrollTop = scrollTop; 
                        } else { 
                            this.value += myValue; 
                            this.focus(); 
                        } 
                } 
            }) 
        })(jQuery); 
        $(document).ready(function () { 
            $(\"#numd\").bind(\"mouseleave\", function () { 
                document.getElementById(\'keybored\').style.display = \'none\'; 
                document.getElementById(\'Nm\').blur(); 
            }); 
            $(\"#Nm\").focus(function () { 
                document.getElementById(\'keybored\').style.display = \'\'; 
            }); 
            $(\".readbtns\").click(function () { 
                $(\"#Nm\").insertAtCaret($(this).val()); 
            }); 
        }); 
    </script> 
</head> 
<body> 
    <ul> 
        <li> 
            <input /> 
            <div> 
            </div> 
        </li> 
    </ul> 
    <input id=\"hid\" type=\"text\" value=\"\" style=\"display: none\" /> 
    <span id=\"numd\" style=\"border: 1px solid red; clear: both; display: inline-block; font: 800em;\"> 
        <input type=\"text\" id=\"Nm\" name=\"Nm\" value=\"\" /> 
        <div style=\"display: none; border: 1px solid #A2B4C6; width: 150px; height: 400px;\" 
            id=\"keybored\"> 
            <input type=\"button\" class=\"readbtns\" value=\"1\" /> 
            <input type=\"button\" class=\"readbtns\" value=\"2\" /> 
            <input type=\"button\" class=\"readbtns\" value=\"3\" /> 
            <input type=\"button\" class=\"readbtns\" value=\"4\" /> 
            <input type=\"button\" class=\"readbtns\" value=\"5\" /> 
            <input type=\"button\" class=\"readbtns\" value=\"6\" /> 
            <input type=\"button\" class=\"readbtns\" value=\"7\" /> 
            <input type=\"button\" class=\"readbtns\" value=\"8\" /> 
            <input type=\"button\" class=\"readbtns\" value=\"9\" /> 
        </div> 
    </span> 
</body> 
</html>

希望本文所述对大家的jQuery程序设计有所帮助。

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