blocks|key|4213938|text|这是FontSize命令的一个限制。我能想到的选项有很多：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4213939|4213940|您可以使用CSS类来代替，并使用我的Rangy库的CSS+class+applier模块；|unordered-list-item|4213941|您可以使用一种老套的方法，例如调用document.execCommand("fontSize",+false,+"7");，然后找到该命令创建的元素，并根据需要更改它们。请参见示例：http://jsfiddle.net/S3ctN/。这显然取决于文档中没有其他大小为7的<font>元素，而且它还依赖于使用<font>元素的浏览器字体大小，这似乎都是这样做的。|4213942|4213943|entityMap|0|LINK|mutability|MUTABLE|url|http://code.google.com/p/rangy/|1|http://code.google.com/p/rangy/wiki/CSSClassApplierModule|2|http://jsfiddle.net/S3ctN/^0|2|8|0|0|I|5|0|P|H|1|0|H|19|3T|6|4B|6|2K|Q|2|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|11|8|@]|D|@]|E|$]]|$1|G|3|H|5|I|7|12|8|@]|D|@$9|13|A|14|1|15]|$9|16|A|17|1|18]]|E|$]]|$1|J|3|K|5|I|7|19|8|@$9|1A|A|1B|B|C]|$9|1C|A|1D|B|C]|$9|1E|A|1F|B|C]]|D|@$9|1G|A|1H|1|1I]]|E|$]]|$1|L|3|-4|5|6|7|1J|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|1K|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]|U|$5|P|Q|R|E|$S|V]]|W|$5|P|Q|R|E|$S|X]]]]

<p>It's a limitation of the <code>FontSize</code> command. There are various options I can think of:</p>

<ul>
<li>You could use a CSS class instead and use the <a href="http://code.google.com/p/rangy/wiki/CSSClassApplierModule" rel="noreferrer">CSS class applier</a> module of my <a href="http://code.google.com/p/rangy/" rel="noreferrer">Rangy</a> library;</li>
<li>You could use a hacky method, such as calling <code>document.execCommand("fontSize", false, "7");</code> and then finding the elements the command has created and changing them as required. See example: <a href="http://jsfiddle.net/S3ctN/" rel="noreferrer">http://jsfiddle.net/S3ctN/</a>. This obviously depends on there being no other <code>&lt;font&gt;</code> elements with size 7 in the document and it also relies on the browser using <code>&lt;font&gt;</code> elements for font size, which it seems they all do.</li>
</ul>


blocks|key|4214017|text|函数|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|4214018|var+execFontSize+=+function+(size,+unit)+{
++++var+spanString+=+$('<span/>',+{
++++++++'text':+document.getSelection()
++++}).css('font-size',+size+%2B+unit).prop('outerHTML');

++++document.execCommand('insertHTML',+false,+spanString);
};|code-block|syntax|javascript|4214019|执行|4214020|execFontSize(30,+'px');|4214021|entityMap^0|0|2|0|0|0|2|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|P|$]]

<p><strong>Function</strong></p>

<pre><code>var execFontSize = function (size, unit) {
    var spanString = $('&lt;span/&gt;', {
        'text': document.getSelection()
    }).css('font-size', size + unit).prop('outerHTML');

    document.execCommand('insertHTML', false, spanString);
};
</code></pre>

<p><strong>Execute</strong></p>

<pre><code>execFontSize(30, 'px');
</code></pre>


blocks|key|2421432|text|正如第二个答案所建议的，只需在execcommand之后运行一些jquery，并用您自己的标记来替换。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2421433|只需用您的元素替换elem，并用所需的值编辑font-size即可。|2421434|jQuery("font[size]",+elem).removeAttr("size").css("font-size",+"10px");|code-block|syntax|javascript|2421435|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

<p>As second answer suggest just run some jquery after execcommand and replace the markup with your own.</p>

<p>Just replace elem with your element and edit the font-size with the desired value.</p>

<pre><code>jQuery("font[size]", elem).removeAttr("size").css("font-size", "10px");
</code></pre>


blocks|key|2139383|text|只需用css覆盖它：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2139384|font[size='7']{
++++font-size:+20px;+//+or+other+length+unit
}|code-block|syntax|javascript|2139385|或者，如果您使用scss，您可以使用循环来生成从1到7的所有选择器：|2139386|@for+$i+from+1+to+7+{
++++font[size='#{$i}']{
++++++++font-size:+$i+*+2vw
++++}
}|2139387|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<p>Just override it with css:</p>

<pre><code>font[size='7']{
    font-size: 20px; // or other length unit
}
</code></pre>

<p>Or if you use scss you could use a loop to generate all selectors from 1 to 7:</p>

<pre><code>@for $i from 1 to 7 {
    font[size='#{$i}']{
        font-size: $i * 2vw
    }
}
</code></pre>


blocks|key|2421619|text|这是一个比这里提出的许多解决方案更好的解决方案，因为它直接从所选文本中获取要更改字体大小的元素。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2421620|因此，它不需要浏览DOM来获取正确的元素，也不需要禁止使用特定的fontSize+(7，正如接受答案的第一个选项和其他答案中所建议的那样)。|2421621|function+changeFont()+{
++++document.execCommand("fontSize",+false,+"7");
++++var+fontElements+=+window.getSelection().anchorNode.parentNode
++++fontElements.removeAttribute("size");
++++fontElements.style.fontSize+=+"30px";
}|code-block|syntax|javascript|2421622|总而言之，我们只是使用execCommand来用跨度包装所选内容，这样随后对getSelection()的调用将突出显示的跨度作为父级。然后，我们只需将fontSize样式添加到该标识的跨度。|2421623|在这里，当我们使用fontSize命令时，它不会被包装在<span>中，而是被包装在<font>中。|offset|length|style|CODE|2421624|但这是一个通用的方法，可以与execCommand的任何命令一起使用，后者只是作为一种方便的方式来包装选定的内容，甚至在不同的元素之间。|2421625|这是一个实时的DEMO|2421626|entityMap|0|LINK|mutability|MUTABLE|url|http://jsfiddle.net/5vL8tz62/2/^0|0|0|0|0|S|6|16|6|0|0|7|4|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|13|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|14|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|15|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|16|8|@$M|17|N|18|O|P]|$M|19|N|1A|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1B|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|1C|8|@]|9|@$M|1D|N|1E|1|1F]]|A|$]]|$1|U|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]]]

<p>Here is a better solution than many proposed here, as it directly gets the element on which to change the font size from the selected text. </p>

<p>As a consequence, it doesn't have to browse the DOM to get the right element, and doesn't require to ban the use of a specific fontSize (7, as suggested in the first option of the accepted answer, and in other answers). </p>

<pre><code>function changeFont() {
    document.execCommand("fontSize", false, "7");
    var fontElements = window.getSelection().anchorNode.parentNode
    fontElements.removeAttribute("size");
    fontElements.style.fontSize = "30px";
}
</code></pre>

<p>In summary we just use execCommand to wrap the selection with a span, so that the subsequent call to getSelection() whill have the highlighted span as parent . Then we just add the fontSize style to that identified span.</p>

<p>Here, as we are using the fontSize command, it won't be wrapped inside a <code>&lt;span&gt;</code>, but inside a <code>&lt;font&gt;</code>. </p>

<p>But this is a generic method which can work with any command of execCommand, the latter being used just as a convenient manner to wrap the selected contents even among different elements. </p>

<p>Here is a live <a href="http://jsfiddle.net/5vL8tz62/2/" rel="noreferrer">DEMO</a></p>


blocks|key|2139425|text|它只适用于我的solutions.it和chrome。该代码是在中国网站(Eqxiu)上找到的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2139426|第一|2139427|document.execCommand("styleWithCSS",+0,+true);
document.execCommand('fontSize',+0,+'12px');|code-block|syntax|javascript|2139428|然后|2139429|jQuery.find('[style*="font-size:+-webkit-xxx-large"],font[size]').css("font-size",+"12px")|2139430|注意:传递给execCommand的字体大小必须至少为'12px‘或更高。|2139431|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

<p>it just my solutions.it works with chrome.
the code was find in a china website(eqxiu).</p>

<p>first</p>

<pre><code>document.execCommand("styleWithCSS", 0, true);
document.execCommand('fontSize', 0, '12px');
</code></pre>

<p>then</p>

<pre><code>jQuery.find('[style*="font-size: -webkit-xxx-large"],font[size]').css("font-size", "12px")
</code></pre>

<p>note:
the fontsize pass to execCommand must be at least '12px' and above.</p>


blocks|key|520635|text|​|type|unstyled|depth|inlineStyleRanges|entityRanges|data|520636|$(document).ready(()=>{
	var+activeFontSize+=+30;
	var+oDoc+=+document.getElementById("editor");
	var+style+=+document.createElement("style");
	document.body.appendChild(style);
	
	function+setFontSize(value){
		$editor.focus();
		document.execCommand("fontsize",+false,+20);
		activeFontSize+=+value;
		createStyle();
		updateTags();
	}

	function+updateTags(){
		var+fontElements+=+oDoc.getElementsByTagName("font");
		for+(var+i+=+0,+len+=+fontElements.length;+i+<+len;+%2B%2Bi)+{
			if+(fontElements[i].size+==+"7")+{
				fontElements[i].removeAttribute("size");
				fontElements[i].style.fontSize+=+activeFontSize%2B"px";
			}
		}
	}

	function+createStyle(){
		style.innerHTML+=+'#editor+font[size="7"]{font-size:+'%2BactiveFontSize%2B'px}';
	}

	function+updateToolBar(args){
		$fontSize.val(args.fontsize);
	}

	var+$fontSize+=+$("#fontSize");
	var+$editor+=+$("#editor");

	$fontSize.on("change",+()=>{
		setFontSize($fontSize.val())
	})

	$editor.on("keyup",+()=>{
		updateTags();
	})

	//var+i+=+0;
	$editor.on("keyup+mousedown",+(e)=>{
		//i%2B%2B;
		//console.log("e.target",+e.target)
		try{
			var+fontsize+=+$(window.getSelection().getRangeAt(0).startContainer.parentNode).css("font-size")
			fontsize+=+fontsize.replace("px",+"");
			//document.execCommand("insertHTML",+false,+'<span+class="font-size-detector'%2Bi%2B'">X</span>');
			//var+fontsize+=+$(e.target).css("font-size")//$editor.find(".font-size-detector"%2Bi).css("font-size");
			//document.execCommand("undo",+false,+false);
			//$editor.focus();
			//console.log("fontsize",+fontsize)
			updateToolBar({fontsize})
		}catch(e){
			console.log("exception",+e)
		}
	})

	oDoc.focus();
	setFontSize(30);
})|code-block|syntax|javascript|520637|.editor-box{box-shadow:0px+0px+1px+2px+#DDD;max-width:500px;margin:0px+auto;}
		.editor-tools{padding:20px;box-shadow:0px+2px+1px+0px+#DDD}
		.editor-tools+button{user-select:none;}
		#editor{height:200px;margin:10px+0px;padding:10px;font-size:14px;}
		#editor:focus{outline:none}|520638|<script+src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div+class="editor-box">
	<div+class="editor-tools">
		<label>Font+Size:+</label>
		<select+id="fontSize"+>
			<option+value="10">10px</option>
			<option+value="12">12px</option>
			<option+value="14">14px</option>
			<option+value="20">20px</option>
			<option+value="22">22px</option>
			<option+value="30"+selected="true">30px</option>
			<option+value="35">35px</option>
			<option+value="40">40px</option>
			<option+value="45">45px</option>
			<option+value="50">50px</option>
		</select>
	</div>
	<div+id="editor"+contenteditable="true">Hello,+this+is+some+editable+text</div>
</div>|520639|520640|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|O|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|I|3|J|5|D|7|Q|8|@]|9|@]|A|$E|F]]|$1|K|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|M|$]]

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>$(document).ready(()=&gt;{
	var activeFontSize = 30;
	var oDoc = document.getElementById("editor");
	var style = document.createElement("style");
	document.body.appendChild(style);
	
	function setFontSize(value){
		$editor.focus();
		document.execCommand("fontsize", false, 20);
		activeFontSize = value;
		createStyle();
		updateTags();
	}

	function updateTags(){
		var fontElements = oDoc.getElementsByTagName("font");
		for (var i = 0, len = fontElements.length; i &lt; len; ++i) {
			if (fontElements[i].size == "7") {
				fontElements[i].removeAttribute("size");
				fontElements[i].style.fontSize = activeFontSize+"px";
			}
		}
	}

	function createStyle(){
		style.innerHTML = '#editor font[size="7"]{font-size: '+activeFontSize+'px}';
	}

	function updateToolBar(args){
		$fontSize.val(args.fontsize);
	}

	var $fontSize = $("#fontSize");
	var $editor = $("#editor");

	$fontSize.on("change", ()=&gt;{
		setFontSize($fontSize.val())
	})

	$editor.on("keyup", ()=&gt;{
		updateTags();
	})

	//var i = 0;
	$editor.on("keyup mousedown", (e)=&gt;{
		//i++;
		//console.log("e.target", e.target)
		try{
			var fontsize = $(window.getSelection().getRangeAt(0).startContainer.parentNode).css("font-size")
			fontsize = fontsize.replace("px", "");
			//document.execCommand("insertHTML", false, '&lt;span class="font-size-detector'+i+'"&gt;X&lt;/span&gt;');
			//var fontsize = $(e.target).css("font-size")//$editor.find(".font-size-detector"+i).css("font-size");
			//document.execCommand("undo", false, false);
			//$editor.focus();
			//console.log("fontsize", fontsize)
			updateToolBar({fontsize})
		}catch(e){
			console.log("exception", e)
		}
	})

	oDoc.focus();
	setFontSize(30);
})</code></pre>
<pre class="snippet-code-css lang-css prettyprint-override"><code>.editor-box{box-shadow:0px 0px 1px 2px #DDD;max-width:500px;margin:0px auto;}
		.editor-tools{padding:20px;box-shadow:0px 2px 1px 0px #DDD}
		.editor-tools button{user-select:none;}
		#editor{height:200px;margin:10px 0px;padding:10px;font-size:14px;}
		#editor:focus{outline:none}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"&gt;&lt;/script&gt;
&lt;div class="editor-box"&gt;
	&lt;div class="editor-tools"&gt;
		&lt;label&gt;Font Size: &lt;/label&gt;
		&lt;select id="fontSize" &gt;
			&lt;option value="10"&gt;10px&lt;/option&gt;
			&lt;option value="12"&gt;12px&lt;/option&gt;
			&lt;option value="14"&gt;14px&lt;/option&gt;
			&lt;option value="20"&gt;20px&lt;/option&gt;
			&lt;option value="22"&gt;22px&lt;/option&gt;
			&lt;option value="30" selected="true"&gt;30px&lt;/option&gt;
			&lt;option value="35"&gt;35px&lt;/option&gt;
			&lt;option value="40"&gt;40px&lt;/option&gt;
			&lt;option value="45"&gt;45px&lt;/option&gt;
			&lt;option value="50"&gt;50px&lt;/option&gt;
		&lt;/select&gt;
	&lt;/div&gt;
	&lt;div id="editor" contenteditable="true"&gt;Hello, this is some editable text&lt;/div&gt;
&lt;/div&gt;</code></pre>
</div>
</div>
</p>


blocks|key|2421672|text|在纯JavaScript中找到了一种解决方案，可以使用自定义的HTML+(颜色、字体系列)处理多行。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2421673|获取文档的选择。解析所选内容并保存其中的html标记。然后使用document.execCommand将选定的html插入到具有内联样式的div中。使用document.execCommand(‘in+html’，false，html)的另一个好处是你可以在所见即所得编辑器中撤消。|2421674|这是函数：|2421675|function+fontSize(size)+{

++++var+sel+=+document.getSelection();+//+Gets+selection

++++var+selectedHtml+=+"";
++++if+(sel.rangeCount)+{
++++++++var+container+=+document.createElement("div");
++++++++for+(var+i+=+0,+len+=+sel.rangeCount;+i+<+len;+%2B%2Bi)+{
++++++++++++container.appendChild(sel.getRangeAt(i).cloneContents());
++++++++}
++++++++const+children+=+container.getElementsByTagName("*")
++++++++for(let+child+of+children)+{
++++++++++++if(child.style.fontSize)+{
++++++++++++++++child.style.fontSize+=+`${size}px`
++++++++++++}
++++++++}
++++++++selectedHtml+=+container.innerHTML;
++++}

++++let+html+=+`<div+style="font-size:+${size}px;">${selectedHtml}</div>`
++++document.execCommand('insertHTML',+false,+html);
}|code-block|syntax|javascript|2421676|希望能有所帮助。|2421677|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|R|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

<p>Found a solution in pure JavaScript that works for multiple lines with custom HTML (colors, font families).</p>

<p>Get the selection of the document. Parse the selection and save the html tags from it. Then with document.execCommand insert the selected html inside a div that has inline style. Also a benefit when using document.execCommand('insertHTML', false, html) is that you get undo in WYSIWYG editor.</p>

<p>This is the function:</p>

<pre><code>function fontSize(size) {

    var sel = document.getSelection(); // Gets selection

    var selectedHtml = "";
    if (sel.rangeCount) {
        var container = document.createElement("div");
        for (var i = 0, len = sel.rangeCount; i &lt; len; ++i) {
            container.appendChild(sel.getRangeAt(i).cloneContents());
        }
        const children = container.getElementsByTagName("*")
        for(let child of children) {
            if(child.style.fontSize) {
                child.style.fontSize = `${size}px`
            }
        }
        selectedHtml = container.innerHTML;
    }

    let html = `&lt;div style="font-size: ${size}px;"&gt;${selectedHtml}&lt;/div&gt;`
    document.execCommand('insertHTML', false, html);
}
</code></pre>

<p>Hope it helps.</p>


blocks|key|4214291|text|如果你想设置编辑器的默认字体大小，那么这是你可以做的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4214292|您必须使用content_style选项配置TinyMCE+CSS。|offset|length|style|CODE|4214293|例如，以下配置将默认字体大小设置为12pt。|4214294|tinymce.init({
++/*+...+*/+content_style:+"body+{font-size:+12pt;}",
});|code-block|syntax|javascript|4214295|请记住，这些样式特定于编辑器中的内容-如果您希望它也是已发布内容的默认大小，则必须确保将相同的样式应用于这些已发布的页面。|4214296|希望能有所帮助。|4214297|entityMap^0|0|5|D|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@$D|W|E|X|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|Z|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|10|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|11|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

<p>If you want to set the default font size for the editor then this is what you can do.</p>
<p>You have to configure the TinyMCE CSS using the <code>content_style</code> options.</p>
<p>For example, the following configuration will set the default font size to 12pt.</p>
<pre class="lang-js prettyprint-override"><code>tinymce.init({
  /* ... */ content_style: &quot;body {font-size: 12pt;}&quot;,
});
</code></pre>
<p>Just remember, these styles are specific to the content inside the editor - if you want it to be the default size on the published content too, you’ll have to make sure the same style is applied to those published pages.</p>
<p>Hope it helps.</p>


<p>How can I change font size to 30px (for example) using <code>document.execCommand</code>?</p>

<p>This:</p>

<pre><code>document.execCommand("fontSize", false, "30px");
</code></pre>

<p>doesn't work, because in 3rd argument of the function execCommand, it only allows me to input a value between and including 1 to 7.</p>


document.execCommand() FontSize in pixels?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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例如，如何使用document.execCommand将字体大小更改为30px这一点：document.execCommand("fontSize", false, "30px");不起作用，因为在函数execCommand的第三个参数中，它只允许我输入一个介于1到7之间的值。

问以像素为单位的document.execCommand() FontSize？
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问以像素为单位的document.execCommand() FontSize？
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