How can I show HTML snippets on a webpage without needing to replace each < with < and > with >?
In other words, is there a tag for don't render HTML until you hit the closing tag?
The tried and true method for HTML:
Replace the & character with &
Replace the < character with <
Replace the > character with >
Optionally surround your HTML sample with <pre> and/or <code> tags.
sample 1:
<pre>
This text has
been formatted using
the HTML pre tag. The brower should
display all white space
as it was entered.
</pre>
sample 2:
<pre>
<code>
My pre-formatted code
here.
</code>
</pre>
sample 3:
(If you are actually "quoting" a block of code, then the markup would be)
<blockquote>
<pre>
<code>
My pre-formatted "quoted" code here.
</code>
</pre>
</blockquote>
is there a tag for don't render HTML until you hit the closing tag?
No, there is not. In HTML proper, there’s no way short of escaping some characters:
& as &
< as <
(Incidentally, there is no need to escape > but people often do it for reasons of symmetry.)
And of course you should surround the resulting, escaped HTML code within <pre><code>…</code></pre> to (a) preserve whitespace and line breaks, and (b) mark it up as a code element.
All other solutions, such as wrapping your code into a <textarea> or the (deprecated) <xmp> element, will break.1
XHTML that is declared to the browser as XML (via the HTTP Content-Type header! — merely setting a DOCTYPE is not enough) could alternatively use a CDATA section:
<![CDATA[Your <code> here]]>
But this only works in XML, not in HTML, and even this isn’t a foolproof solution, since the code mustn’t contain the closing delimiter ]]>. So even in XML the simplest, most robust solution is via escaping.
1 Case in point:
textarea {border: none; width: 100%;}
<textarea readonly="readonly">
<p>Computer <textarea>says</textarea> <span>no.</span>
</textarea>
<xmp>
Computer <xmp>says</xmp> <span>no.</span>
</xmp>
Kind of a naive method to display code will be including it in a textarea and add disabled attribute so its not editable.
<textarea disabled> code </textarea>
Hope that help someone looking for an easy way to get stuff done.
But warning, this won't escape the tags for you, as you can see here (the following obviously does not work):
<textarea disabled>
This is the code to create a textarea:
<textarea></textarea>
</textarea>
Deprecated, but works in FF3 and IE8.
<xmp>
<b>bold</b><ul><li>list item</li></ul>
</xmp>
Recommended:
<pre><code>
code here, escape it yourself.
</code></pre>
i used <xmp> just like this :
http://jsfiddle.net/barnameha/hF985/1/
The deprecated <xmp> tag essentially does that but is no longer part of the XHTML spec. It should still work though in all current browsers.
Here's another idea, a hack/parlor trick, you could put the code in a textarea like so:
<textarea disabled="true" style="border: none;background-color:white;">
<p>test</p>
</textarea>
Putting angle brackets and code like this inside a text area is invalid HTML and will cause undefined behavior in different browsers. In Internet Explorer the HTML is interpreted, whereas Mozilla, Chrome and Safari leave it uninterpreted.
If you want it to be non-editable and look different then you could easily style it using CSS. The only issue would be that browsers will add that little drag handle in the bottom-right corner to resize the box. Or alternatively, try using an input tag instead.
The right way to inject code into your textarea is to use server side language like this PHP for example:
<textarea disabled="true" style="border: none;background-color:white;">
<?php echo '<p>test</p>'; ?>
</textarea>
Then it bypasses the html interpreter and puts uninterpreted text into the textarea consistently across all browsers.
Other than that, the only way is really to escape the code yourself if static HTML or using server-side methods such as .NET's HtmlEncode() if using such technology.
If your goal is to show a chunk of code that you're executing elsewhere on the same page, you can use textContent (it's pure-js and well supported: http://caniuse.com/#feat=textcontent)
<div id="myCode">
<p>
hello world
</p>
</div>
<div id="loadHere"></div>
document.getElementById("myCode").textContent = document.getElementById("loadHere").innerHTML;
To get multi-line formatting in the result, you need to set css style "white-space: pre;" on the target div, and write the lines individually using "\r\n" at the end of each.
Here's a demo: https://jsfiddle.net/wphps3od/
This method has an advantage over using textarea: Code wont be reformatted as it would in a textarea. (Things like are removed entirely in a textarea)
In HTML? No.
In XML/XHTML? You could use a CDATA block.
I assume:
you want to write 100% valid HTML5
you want to place the code snippet (almost) literal in the HTML
especially < should not need escaping
All your options are in this tree:
with HTML syntax
there are five kinds of elements
those called "normal elements" (like <p>)
can't have a literal <
it would be considered the start of the next tag or comment
void elements
they have no content
you could put your HTML in a data attribute (but this is true for all elements)
that would need JavaScript to move the data elsewhere
in double-quoted attributes, " and &thing; need escaping: " and &thing; respectively
raw text elements
<script> and <style> only
they are never rendered visible
but embedding your text in Javascript might be feasable
Javascript allows for multi-line strings with backticks
it could then be inserted dynamically
a literal </script is not allowed anywhere in <script>
escapable raw text elements
<textarea> and <title> only
<textarea> is a good candidate to wrap code in
it is totally legal to write </html> in there
not legal is the substring </textarea for obvious reasons
escape this special case with </textarea or similar
&thing; needs escaping: &thing;
foreign elements
elements from MathML and SVG namespaces
at least SVG allows embedding of HTML again...
and CDATA is allowed there, so it seems to have potential
with XML syntax
covered by Konrad's answer
Note: > never needs escaping. Not even in normal elements.
It's vey simple ....
Use this xmp code
<xmp id="container">
<xmp >
<p>a paragraph</p>
</xmp >
</xmp>
<textarea ><?php echo htmlentities($page_html); ?></textarea>
works fine for me..
"keeping in mind Alexander's suggestion, here is why I think this is a good approach"
if we just try plain <textarea> it may not always work since there may be closing textarea tags which may wrongly close the parent tag and display rest of the HTML source on the parent document, which would look awkward.
using htmlentities converts all applicable characters such as < > to HTML entities which eliminates any possibility of leaks.
There maybe benefits or shortcomings to this approach or a better way of achieving the same results, if so please comment as I would love to learn from them :)
This is a simple trick and I have tried it in Safari and Firefox
<code>
<span><</span>meta property="og:title" content="A very fine cuisine" /><br>
<span><</span>meta property="og:image" content="http://www.example.com/image.png" />
</code>
It will show like this:
You can see it live Here
You could try:
Hello! Here is some code:
<xmp>
<div id="hello">
</div>
</xmp>
This is a bit of a hack, but we can use something like:
body script {
display: block;
font-family: monospace;
white-space: pre;
}
<script type="text/html">
<h1>Hello World</h1>
<ul>
<li>Enjoy this dodgy hack,
<li>or don't!
</ul>
</script>
With that CSS, the browser will display scripts inside the body. It won’t attempt to execute this script, as it has an unknown type text/html. It’s not necessary to escape special characters inside a <script>, unless you want to include a closing </script> tag.
I’m using something like this to display executable JavaScript in the body of the page, for a sort of "literate progamming".
There’s some more info in this question When should tags be visible and why can they?.
function escapeHTML(string)
{
var pre = document.createElement('pre');
var text = document.createTextNode(string);
pre.appendChild(text);
return pre.innerHTML;
}//end escapeHTML
it will return the escaped Html
Ultimately the best (though annoying) answer is "escape the text".
There are however a lot of text editors -- or even stand-alone mini utilities -- that can do this automatically. So you never should have to escape it manually if you don't want to (Unless it's a mix of escaped and un-escaped code...)
Quick Google search shows me this one, for example: http://malektips.com/zzee-text-utility-html-escape-regular-expression.html
This is by far the best method for most situations:
<pre><code>
code here, escape it yourself.
</code></pre>
I would have up voted the first person who suggested it but I don't have reputation. I felt compelled to say something though for the sake of people trying to find answers on the Internet.
You could use a server side language like PHP to insert raw text:
<?php
$str = <<<EOD
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="description" content="Minimal HTML5">
<meta name="keywords" content="HTML5,Minimal">
<title>This is the title</title>
<link rel='stylesheet.css' href='style.css'>
</head>
<body>
</body>
</html>
EOD;
?>
then dump out the value of $str htmlencoded:
<div style="white-space: pre">
<?php echo htmlentities($str); ?>
</div>
There are a few ways to escape everything in HTML, none of them nice.
Or you could put in an iframe that loads a plain old text file.
Actually there is a way to do this. It has limitation (one), but is 100% standard, not deprecated (like xmp), and works.
And it's trivial. Here it is:
<div id="mydoc-src" style="display: none;">
LlNnlljn77fggggkk77csJJK8bbJBKJBkjjjjbbbJJLJLLJo
<!--
YOUR CODE HERE.
<script src="WidgetsLib/all.js"></script>
^^ This is a text, no side effects trying to load it.
-->
LlNnlljn77fggggkk77csJJK8bbJBKJBkjjjjbbbJJLJLLJo
</div>
Please let me explain. First of all, ordinary HTML comment does the job, to prevent whole block be interpreted. You can easily add in it any tags, all of them will be ignored. Ignored from interpretation, but still available via innerHTML! So what is left, is to get the contents, and filter the preceding and trailing comment tokens.
Except (remember - the limitation) you can't put there HTML comments inside, since (at least in my Chrome) nesting of them is not supported, and very first '-->' will end the show.
Well, it is a nasty little limitation, but in certain cases it's not a problem at all, if your text is free of HTML comments. And, it's easier to escape one construct, then a whole bunch of them.
Now, what is that weird LlNnlljn77fggggkk77csJJK8bbJBKJBkjjjjbbbJJLJLLJo string? It's a random string, like a hash, unlikely to be used in the block, and used for? Here's the context, why I have used it. In my case, I took the contents of one DIV, then processed it with Showdown markdown, and then the output assigned into another div. The idea was, to write markdown inline in the HTML file, and just open in a browser and it would transform on the load on-the-fly. So, in my case, <!-- became transformed to <p><!--</p>, the comment properly escaped. It worked, but polluted the screen. So, to easily remove it with regex, the random string was used. Here's the code:
var converter = new showdown.Converter();
converter.setOption('simplifiedAutoLink', true);
converter.setOption('tables', true);
converter.setOption('tasklists', true);
var src = document.getElementById("mydoc-src");
var res = document.getElementById("mydoc-res");
res.innerHTML = converter.makeHtml(src.innerHTML)
.replace(/<p>.{0,10}LlNnlljn77fggggkk77csJJK8bbJBKJBkjjjjbbbJJLJLLJo.{0,10}<\/p>/g, "");
src.innerHTML = '';
And it works.
If somebody is interested, this article is written using this technique. Feel free to download, and look inside the HTML file.
It depends what you are using it for. Is it user input? Then use <textarea>, and escape everything. In my case, and probably it's your case too, I simply used comments, and it does the job.
If you don't use markdown, and just want to get it as is from a tag, then it's even simpler:
<div id="mydoc-src" style="display: none;">
<!--
YOUR CODE HERE.
<script src="WidgetsLib/all.js"></script>
^^ This is a text, no side effects trying to load it.
-->
</div>
and JavaScript code to get it:
var src = document.getElementById("mydoc-src");
var YOUR_CODE = src.innerHTML.replace(/(<!--|-->)/g, "");
This is how I did it:
$str = file_get_contents("my-code-file.php");
echo "<textarea disabled='true' style='border: none;background-color:white;'>";
echo $str;
echo "</textarea>";
It may not work in every situation, but placing code snippets inside of a textarea will display them as code.
You can style the textarea with CSS if you don't want it to look like an actual textarea.
If you are looking for a solution that works with frameworks.
const code = `
<div>
this will work in react
<div>
`
<pre>
<code>{code}</code>
</pre>
And you can give it a nice look with css:
pre code {
background-color: #eee;
border: 1px solid #999;
display: block;
padding: 20px;
}
JavaScript string literals can be used to write the HTML across multiple lines. Obviously, JavaScript, ECMA6 in particular, is required for this solution.
.createTextNode paired with CSS white-space: pre-wrap; does the trick.
.innerText alone also works. Run code snippet below.
let codeBlock = `
<!DOCTYPE HTML>
<html lang="en">
<head>
<title>My Page</title>
</head>
<body>
<h1>Welcome to my page</h1>
<p>I like cars and lorries and have a big Jeep!</p>
<h2>Where I live</h2>
<p>I live in a small hut on a mountain!</p>
</body>
</html>
`
const codeElement = document.querySelector("#a");
let textNode = document.createTextNode(codeBlock);
codeElement.appendChild(textNode);
const divElement = document.querySelector("#b");
divElement.innerText = codeBlock;
#a {
white-space: pre-wrap;
}
<div id=a>
</div>
<div id=b>
</div>
//To show xml tags in table columns you will have to encode the tags first
function htmlEncode(value) {
//create a in-memory div, set it's inner text(which jQuery automatically encodes)
//then grab the encoded contents back out. The div never exists on the page.
return $('<div/>').text(value).html();
}
html = htmlEncode(html)
A combination of a couple answers that work together here:
function c(s) {
return s.split("<").join("<").split(">").join(">").split("&").join("&")
}
displayMe.innerHTML = ok.innerHTML;
console.log(
c(ok.innerHTML)
)
<textarea style="display:none" id="ok">
<script>
console.log("hello", 5&9);
</script>
</textarea>
<div id="displayMe">
</div>
I used this a long time ago and it did the trick for me, I hope it helps you too.
var preTag = document.querySelectorAll('pre');
console.log(preTag.innerHTML);
for (var i = 0; i < preTag.length; i++) {
var pattern = preTag[i].innerHTML;
pattern = pattern.replace(/</g, "<").replace(/>/g, ">");
console.log(pattern);
preTag[i].innerHTML = pattern;
}
<pre>
<p>example</p>
<span>more text</span>
</pre>
You can separate the tags by changing them to spans.
Like this:
<span><</span> <!-- opening bracket of h1 here -->
<span>h1></span> <!-- opening tag of h1 completed here -->
<span>hello</span> <!-- text to print -->
<span><</span> <!-- closing h1 tag's bracket here -->
<span>/h1></span> <!-- closing h1 tag ends here -->
And also, you can just only add the <(opening angle bracket) to the spans
<span><</span> <!-- opening bracket of h1 here -->
h1> <!-- opening tag of h1 completed here -->
hello <!-- text to print -->
<span><</span> <!-- closing h1 tag's bracket here -->
/h1><!-- closing h1 tag ends here -->
<code><?php $str='<';echo htmlentities($str);?></code>
I found this to be the easiest, fastest and most compact.
I want that just one of my divs ignores all containing in it html tags such as <br/>'s, <p>'s and <b>'s. How's this possible? Thank you!
If the HTML tags you wish to ignore are currently static text, do a find and replace of (in this order):
Find Replace
-----------------
& &
< <
If the HTML tags you wish to ignore are outputted using PHP, use htmlspecialchars() on the output and use UTF-8 to encode your page.
echo htmlspecialchars($stringThatContainsHTML, ENT_COMPAT | ENT_HTML5, 'UTF-8');
Inspect your question and see how Stackoverflow do it.
You'll see that <br/>, <p> and <b> are in a code element.
Encode your html entities:
< … <
> … >
& … &
" … "
(' … ' xml, not html. see comments)
You might also want to use
<pre><code>
here comes your preformatted and escaped <html>-code
</code></pre>
to have your code monospaced and preserve whitespaces
You cannot do such things in HTML. You can use JavaScript to modify the document tree, replacing element nodes by their contents or by manipulating the innerHTML property. Of course, search engines and friends would still “see” the tags you make browsers ignore.
Alternatively, you can use CSS to nullify the effect of tags on rendering, but this only affects presentation (when CSS is enabled), not any functionality that browsers might have for some elements. And it would need to be different for different elements. For the tags mentioned in the question, assuming that your div element has class=ignoreTags, for definiteness, the following would nullify any normal effect on visual rendering they would have:
<style>
.ignoreTags br { display: none; }
.ignoreTags p { display: inline; margin: 0; }
.ignoreTags b { font-weight: normal; }
</style>
Found some hack that might be working
<input value='stack<br> <b>My</b> text' />
design the input size as you wish
How can I get HTML to work in the value of the input field ? If you include HTML in the value, it appears as pure text. Is there a way to do something like this?
<input type='text' value='<b>tekst</b>'></input>
So the the output is:
tekst
instead of
<b>tekst</b>
I think that was bad example... I want every appropriate HTML tag to work. If i want to include an image, the image appears in the input, if i want to add a tag ... the text should appear as a link linked.
I'm not sure from your question whether you are trying to make the value contain HTML, or whether you want to apply HTML to something inside the input.
If you want to be able to set the value to some HTML, like <input value="<b>Some HTML</b>"> where the value will actually show the HTML, you need to encode the HTML brackets like <input value="<b>Some text<b/>">. There are functions available to do this for you automatically in most scripting languages (e.g. htmlentities() in PHP).
If you want to apply HTML to the input value, short answer is... you can't. If you want formatting on there, you could use the contentEditable attribute in HTML5 which lets you just edit-in-place (think Flickr headers).
If you just want a standard input field to be styled, you can just use CSS like the other answers suggested.
You have to encode all the HTML you want in the value and paste it in the input value.
If you encode this:
"http://sansoftmax.blogspot.com/"
It will look like this:
"http://sansoftmax.blogspot.com/"
In input:
value=""http://sansoftmax.blogspot.com/""
Online Html Encoder/Decoder
You can try to decode you entities from your postvalue.
In PHP you can do this with html_entity_decode();
I don't think you can put HTML inside a text field and have it interpreted as HTML instead of as text in the field.
To accomplish what you want you'll have to use CSS. An in-line example to bold the text as you cited in your example:
<input type="text" style="font-weight: bold;" value="tekst" />
Try CSS:
input[type=text] {
font-weight: bold;
}
<span name="tumme"><img ...
is not valid because "name" is not valid in "span".
But I need to use name="tumme" and I need to be able to use text and img inside the tag.
So what tag can I use together with "name" and on the same time follow w3c?
To answer the question directly, as per the spec the name attribute is allowed on the following HTML elements (very few of these will be useful to you):
BUTTON
TEXTAREA
SELECT
FORM
FRAME
IFRAME
IMG
A
INPUT
OBJECT
MAP
PARAM
META
Is there a reason you must use a "name" attribute rather than a class or an id? Since both class and id are valid for span elements, and since span appears to be the most appropriate element to use,I'd set one of those to "tumme" rather than bending another element into shape.
You could use the <a> tag with no href attribute.
As I said in response to your earlier question — use classes.
Basically, the only valid reason that I can think of where you would want to use the name attribute, is to have DOM access via document.getElementsByName()
or to use it as a FORM OUTPUT.
As a result, what you should be doing is using the HTML5 OUTPUT tag
and add the following in your HEAD tag for legacy browsers:
// Create a fake OUTPUT element, so IE can style it.
<script type="text/javascript> document.createElement("output");</script>
// Implement default style, so that it acts like a SPAN in other browsers:
<style type="text/css"> output { display:inline; border:0; outline:0; margin:0;padding:0; } </style>
http://html5doctor.com/the-output-element/
<output name="tumme"><img src="..." /></output>
If it is only for styling purposes or simple DOM query purposes
then you should use this as proposed earlier:
<span class="tumme"><img src="..." /></span>
or
<span id="tumme"><img src="..." /></span>
name is only valid in the <a> tag IIRC (and form elements as was pointed out by David in the comments) but I'm pretty sure that is not what you're after:
<a name="whatever"></a> would create an "anchor" on a page that could be linked to with Link text.
Why do you need to use the name attribute? Why couldn't you simply use id instead?