如何将文本区域的内容发送到Typescript / Javascript / HTML中的函数

可能是一个非常简单的问题，但是我似乎找不到一种将文本区域中的数据发送到javascript / typescript函数的方法。

的HTML

  <div  data-options="dxContent : { targetPlaceholder: 'content' } " >
        <p> use this page to log errors</p>
        <p id="prevErrors" style="font-style:italic">PreviousErrors</p>
        <br />
        <div id="curError" data-bind="dxTextArea: { }"></div>
        <br />
        <div  data-bind="dxButton: { text: 'Save and return to main menu' }" onclick="    saveMyData(document.getElementById(curError).innerText)"></div>
    </div>

Java / TypeScript

<script>


        function saveMyData(curError) {
            //this will be where data is saved or emailed
            var today = new Date();
            var dd = today.getDate();
            var mm = today.getMonth() + 1; //January is 0!
            var yyyy = today.getFullYear();
            var h = today.getHours(); 
            var m = today.getMinutes(); 
            var s = today.getSeconds();
            if (dd < 10) {
                dd = '0' + dd
            }
            if (h < 10) {
                h = "0" + h;
            }
            if (s < 10)
            {
                s = "0"+s;
            }
            if (m < 10) {
                m = "0"+m;
            }
            if (mm < 10) {
                mm = '0' + mm
            }

            today = dd + '/' + mm + '/' + yyyy +" , "+h+":"+m+":"+s;
            prevErrors.innerText +=  "\n "+today+", "+curError;
        }
    </script>

直到最近才发现打字稿和javascript几乎是完全相同的，我感到有点尴尬的是，启动打字稿一直是一场战斗-不像c＃/ vb / etc。

问题

我一直试图将数据从此dxtextArea控件发送到函数。如您所见，我已经尝试使用innerText，但是，这似乎什么也没发送到函数中（得到错误：

'Uncaught TypeError: Cannot read property 'innerText' of null', line 1, file 'http://localhost:51828/index.html#'.

即使textArea中存在数据。

有人遇到过这个问题/知道如何解决/是我对Java /打字稿知识的愚蠢和天真吗？

编辑

有人告诉我将我的Method调用从innerText更改为value（并在ID周围加上引号），但这仍然不能解决问题：

saveMyData(document.getElementById('curError').value)"

编辑2我的完整脚本：

<div data-options="dxView : { name: 'ErrorLogging', title: 'ErrorLogging' } " >
    <div  data-options="dxContent : { targetPlaceholder: 'content' } " >
        <p>Use this page to log errors</p>
        <br />
        <p style="font-style:italic">PreviousErrors</p>
        <p id="prevErrors" style="font-style:italic"></p>
        <br />
        <div id="curError" data-bind="dxTextArea: { }" ></div>
        <br />
        <div  data-bind="dxButton: { text: 'Save and return to main menu' }" onclick="saveMyData(document.getElementById('curError').textContent)"></div>
    </div>
</div>
<script>

    function saveMyData(elem) {
        //this will be where data is saved or emailed


        var today = new Date();
        var dd = today.getDate();
        var mm = today.getMonth() + 1; //January is 0!
        var yyyy = today.getFullYear();
        var h = today.getHours(); 
        var m = today.getMinutes(); 
        var s = today.getSeconds();

        //add a '0' in front of single digit values
        if (dd < 10) {
            dd = '0' + dd
        }
        if (h < 10) {
            h = "0" + h;
        }
        if (s < 10)
        {
            s = "0"+s;
        }
        if (m < 10) {
            m = "0"+m;
        }
        if (mm < 10) {
            mm = '0' + mm
        }

        if (elem.textContent) {
            var curError = elem.textContent ?
                elem.textContent :
                elem.innerText;
        }
        alert(curError);

        today = dd + '/' + mm + '/' + yyyy +" , "+h+":"+m+":"+s; //created string containing todays' date and time
        prevErrors.innerText += "\n " + today + ", " + elem;

    }
</script>