如何在js中添加文本到textarea

Question

我在网站hokuco.com上的文本编辑器中添加文本时遇到问题。 这就是我所拥有的;

请尝试我的示例，您将看到文本框包含文本，我希望自动添加到java脚本中，编辑代码的人将看不到它

<div class = "fixed">
<center>
<table>
	<tr><td>Type here</td></tr>
	<tr>
		<td colspan="3">
			<textarea id="inputTextToSave" style="width:512px;height:256px">
			&lt;html&gt; 
			&lt;body&gt; 
			&lt;link rel="stylesheet" type="text/css" href="ceedweb.css" /&gt;
			&lt;!--type down there, by the way, this is a comment tag you won't need it--&gt;
			
			
			&lt;body&gt;
			&lt;/html&gt;
			</textarea>
		</td>
	</tr>
	<tr>
		<td>Save As:</td>
		<td><input id="inputFileNameToSaveAs"></input></td>
		<td><button onclick="saveTextAsFile()"><img src="fl.gif" Save</button></td>
	</tr>
	<tr>
		<td>Select file Load:</td>
		<td><input type="file" id="fileToLoad"></td>
		<td><button onclick="loadFileAsText()">Load File</button><td>
	</tr>
</table>
</center>
<hr>
<script type='text/javascript'>

function saveTextAsFile()
{
	var textToWrite = document.getElementById("inputTextToSave").value;
	var textFileAsBlob = new Blob([textToWrite], {type:'text/html'});
	var fileNameToSaveAs = document.getElementById("inputFileNameToSaveAs").value;

	var downloadLink = document.createElement("a");
	downloadLink.download = fileNameToSaveAs;
	downloadLink.innerHTML = "Download File";
	if (window.webkitURL != null)
	{
		
		downloadLink.href = window.webkitURL.createObjectURL(textFileAsBlob);
	}
	else
	{
		
		downloadLink.href = window.URL.createObjectURL(textFileAsBlob);
		downloadLink.onclick = destroyClickedElement;
		downloadLink.style.display = "none";
		document.body.appendChild(downloadLink);
	}

	downloadLink.click();
}

function destroyClickedElement(event)
{
	document.body.removeChild(event.target);
}

function loadFileAsText()
{
	var fileToLoad = document.getElementById("fileToLoad").files[0];

	var fileReader = new FileReader();
	fileReader.onload = function(fileLoadedEvent) 
	{
		var textFromFileLoaded = fileLoadedEvent.target.result;
		document.getElementById("inputTextToSave").value = textFromFileLoaded;
	};
	fileReader.readAsText(fileToLoad, "UTF-8");
}

</script>
</div>

Answer 1

如果您希望将该textarea的内容添加到用户的输入中而不将它们显示在textarea中，您可以在进一步处理之前简单地对textarea的值执行字符串连接：

var textToWrite = 'stuff that comes before';
textToWrite += document.getElementById("inputTextToSave").value;
textToWrite += 'stuff that comes after';
// And then do all the rest.
var textFileAsBlob = new Blob([textToWrite], {type:'text/html'});