JQuery:转换为&来自textarea元素

时间:2011-09-21 06:57:05

标签: javascript jquery html css

我是JQuery&的新手我试图做一些我不确定在JQuery中可以做的事情。

  • 我可以使用JQuery(或者甚至是原生Javascript)函数获取HTML元素类型吗?如果是,该函数的名称是什么?
  • 我想更新/设置HTML元素类属性。你会建议我只使用普通的旧setAttribute(),还是应该使用JQuery函数?如果我应该使用JQuery函数,该函数的名称是什么?
  • 是否有返回HTML元素类的javascript函数?是this.getAttribute(“class”);?

更有经验的JQuery程序员:你如何改进这个尝试将元素更改为textarea的JQuery HTML代码然后又回来了(现在缺少一些功能):

<html>
<head>

    <script type="text/javascript" src="jquery-1.6.4.js"></script>
    <script type="text/javascript">
    <!--
        var STATE = 0;

        function Toggle()
        {
            if (STATE==1) { convertToUpdatable(); STATE = 0; }
            else          { convertToStatic();    STATE = 1; }
        }

        function convertToUpdatable()
        {
            // Post: Convert all HTML elements (with the class 'updatable') to textarea HTML elements
            //       and store their HTML element type in the class attribute
            // EG: Before: <p class="updatable"/> Hello this is some text 1 </p>
            //     After : <textarea class="updatable p"/> Hello this is some text 1 </textarea>

            $(".updatable").each(function()
                {
                    $(this).replaceWith("<textarea>"+$(this).text() +"</textarea>");
                    // TODO store this elements type in class attribute
                    // The below is guessing that there are jquery functions getType()
                    $(this).setAttribute( "class", $(this).getAttribute("class") + $(this).getType() );
                });
        }

        function convertToStatic()
        {
            // Post: Find all HTML elements (with the class 'updatable'), check to see if they are part of another class aswell
            //       (which will be their original HTML element type) & convert the element back to that original HTML element type

            $(".updatable").each(function()
                {
                    // This uses javascript functions: how can I write this in JQuery
                    var type = this.getAttribute("class").replace("updatable","").replace(" ", "");

                    if (type == "") { alert("Updatable element had no type defined in class attribute"); return; }

                    $(this).replaceWith( type +$(this).text() + type );
                    $(this).setAttribute( "class", "updatable" );
                });
        }

    -->
    </script>
</head>
<body>

    <p class="updatable"/> Hello this is some text 1 </p>
    <b class="updatable"/> Hello this is some text 2 </b>
    <i class="updatable"/> Hello this is some text 3 </i>

    <input id="MyButton" type="button" value="Click me!" onclick="Toggle();" />

</body>
</html>

2 个答案:

答案 0 :(得分:0)

答案 1 :(得分:0)

使用Javascript:

your_element.className = 'some_class';
your_element.nodeName;