Javascript 更改 textarea 字段中的字体和字体大小
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Changing the Font and font Size in a textarea field
提问by Squarefinger
Using the following code sample:
使用以下代码示例：
<html>
<body>
<script language = "Javascript">
maxL=240;
var bName = navigator.appName;
function taLimit(taObj) {
if (taObj.value.length==maxL) return false;
return true;
}
function taCount(taObj,Cnt) {
objCnt=createObject(Cnt);
objVal=taObj.value;
if (objVal.length>maxL) objVal=objVal.substring(0,maxL);
if (objCnt) {
if(bName == "Netscape"){
objCnt.textContent=maxL-objVal.length;}
else{objCnt.innerText=maxL-objVal.length;}
}
return true;
}
function createObject(objId) {
if (document.getElementById) return document.getElementById(objId);
else if (document.layers) return eval("document." + objId);
else if (document.all) return eval("document.all." + objId);
else return eval("document." + objId);
}
</script>
<font face="Arial" font size="2">
Maximum Number of characters for this text box is 240.</font><br>
<textarea onKeyPress="return taLimit(this)" onKeyUp="return taCount(this,'myCounter')" name="Message" rows=6 wrap="physical" cols=42>
</textarea>
<br>
<font face="Arial" font size="2">
You have <B><SPAN id=myCounter>240</SPAN></B> characters remaining
for your message</font>
</body>
</html>
How do I change the font and font size in the textarea?
如何更改 textarea 中的字体和字体大小？
回答by Donut
Use CSSto define a style for the textareaelement. For example:
使用CSS定义textarea元素的样式。例如：
textarea {
font-size: 20pt;
font-family: Arial;
}
Note that there are three waysto add CSS to your website -- you can use an external stylesheet, an internal stylesheet, or inline styles (or a combination thereof).
请注意，可以通过三种方式将 CSS 添加到您的网站——您可以使用外部样式表、内部样式表或内联样式（或它们的组合）。
Using an internal stylesheet might look like this:
使用内部样式表可能如下所示：
<head>
<style type="text/css">
textarea {
font-size: 20pt;
font-family: Arial;
}
</style>
</head>
<!-- rest of your code goes here... -->
See herefor more information on styling textarea.
有关样式的更多信息，请参见此处textarea。
回答by SicLeaf
I know this is really old, but I am sure someone could use this information:
我知道这真的很旧，但我相信有人可以使用这些信息：
use Iframe and initialize it to run when the page is loaded and hide textarea...this helps if you want to make a WYSIWYG editor.
使用 iframe 并初始化它以在页面加载时运行并隐藏 textarea...如果您想制作 WYSIWYG 编辑器，这会有所帮助。
html page: onLoad="iFrame()"
html 页面：onLoad="iFrame()"
js page: function iFrame(){ name.document.designMode = 'on'; name.document.execCommand('fontName',false,"verdana");
js 页面：function iFrame(){ name.document.designMode = 'on'; name.document.execCommand('fontName',false,"verdana");
}
}
