Question

我在stackoverflow上发现了一些代码，它将文本输入字段中的文本插入到光标位置的textarea中。

我想要做的是修改此工作代码，以便用户可以将带有Title文本的URL输入到两个表单输入字段中，从输入中构建完整的超文本链接，并将锚标记的结果HTML插入到textarea中光标位置的完整链接，就像在wysiwig编辑器中单击插入URL按钮时发生的那样。

我如何修改下面的代码来完成此任务？

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Test Page</title>

<script type="text/javascript">
window.onload = function()
{
        btn = document.getElementById("btnInsertText");
        myText = document.getElementById("myTextArea");
        text = document.getElementById("textToInsert");
        btn.onclick = function()
        {
            insertAtCursor(myText, text.value);
        }
}

function insertAtCursor(myField, myValue)
{ 
    //IE support 
    if (document.selection)
    { 
        myField.focus();
        sel = document.selection.createRange(); 
        sel.text = myValue; 
    }

    //Mozilla/Firefox/Netscape 7+ support 
    else if (myField.selectionStart || myField.selectionStart == '0')
    {  
        var startPos = myField.selectionStart;
        var endPos = myField.selectionEnd; 
        myField.value = myField.value.substring(0, startPos)+ myValue 
        + myField.value.substring(endPos, myField.value.length);
    }

    else
    { 
        myField.value += myValue; 
    } 
}       
</script>

</head>
<body>
Text To Insert: <input type="text" id="textToInsert" />

<input type="button" id="btnInsertText" value="Insert Text" /><br />
<br />
<textarea id="myTextArea" rows="6" cols="50">
Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old.
</textarea>

</body>
</html>

Answer 1

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <title>Test Page</title>

    <script type="text/javascript">
    window.onload = function()
    {
            btn = document.getElementById("btnInsertText");
            myText = document.getElementById("myTextArea");
            title = document.getElementById("insTitle");
            url = document.getElementById("insUrl");
            btn.onclick = function()
            {
                insertAtCursor(myText, title.value, url.value);
            }
    }

    function insertAtCursor(myField, title, url)
    { 
        //IE support 
        if (document.selection)
        { 
            myField.focus();
            sel = document.selection.createRange(); 
            sel.text = '<a href="'+url+'">'+title+'</a>'; 
        }

        //Mozilla/Firefox/Netscape 7+ support 
        else if (myField.selectionStart || myField.selectionStart == '0')
        {  
            var startPos = myField.selectionStart;
            var endPos = myField.selectionEnd; 
            myField.value = myField.value.substring(0, startPos)+ '<a href="'+url+'">'+title+'</a>' + myField.value.substring(endPos, myField.value.length);
        }

        else
        { 
            myField.value += myValue; 
        } 
    }       
    </script>

    </head>
    <body>
      title: <input type="text" id="insTitle" /><br />
      url: <input type="text" id="insUrl" />
      <input type="button" id="btnInsertText" value="Insert Text" /><br /><br />
      <textarea id="myTextArea" rows="6" cols="50">
        Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old.
      </textarea>
    </body>
    </html>

However not tested in IE!

使用JavaScript在表单输入字段的光标位置将链接URL和标题文本插入textarea

1 个答案: