<noscript> not working for firefox - javascript

I have this little bit of code for a fade in effect but for some reason firefox is not picking up the which I need because the fade it doesn't work for firefox. What am I missing to get this to work?
<noscript>
</style>
<style type="text/css">
body {display:inherit !important;} /*if they haven't got javascript we need to show the body
</style>
</noscript>
<script type="text/javascript">
$(document).ready(function() { $("body").fadeIn(1500);});
</script>
the css
body {
background-color:#000;
overflow-x:hidden;
-webkit-text-size-adjust:100%;
display:none;}

You can't have a <noscript> tag anywhere but the <body> section of your document, and you can't have a <style> tag anywhere but the <head> section of your document (see this post).
An alternative way to do this would be to make the body tag default to display: visible and set the display property using JavaScript like so:
<body>
<script type="text/javascript">document.body.style.display = "none";</script>
...
</body>
Then get rid of your <noscript> tag completely and remove the display:none; line from your CSS declaration.
The advantage of this is that if the browser doesn't have JavaScript enabled, your <body> tag will be visible, regardless of how the browser handles the <noscript> tag.

Related

Add element styling when JavaScript is disabled

I'm trying to avoid adding online styling when JS is being disabled.
For example, I'd like to hide an element in the body when JS is disabled, but i'd like to do it from external CSS only.
I'd like to avoid adding style like below
<noscript>
<style>
...some style
</style>
<p class="no-js">You need Javascript enabled to view all of the content on this page.</p>
</noscript>
<body>
<div>element to hide when js disabled</div>
</body>
Is there an alternative to this?
Thanks!
" I'd like to hide an element in the body when JS is disabled "
You can create a class with display:none, assign it to all elements you want to hide if javascript is disabled, and through javascript remove this class from these elements, if javascript is disabled, then this class will always apply and all elements with this class are not displayed
JS Fiddle
var secrets = document.querySelectorAll('.secret');
for (var i in secrets) {
secrets[i].classList.remove('secret');
}
.secret {
display: none;
}
Try this code:
<noscript>
<style>
#foo {
display:none;
}
</style>
</noscript>
You should use <noscript> tag, for hide an element, in <style> tag make it display:none. there is no way to this with standalone css! but you can do this with javascript or etc, look other answer.
<noscript>
<style type="text/css">
.divtohide {display:none;}
</style>
<div class="divtohide">
Javascript is disabled!
</div>
</noscript>
Alternatively, just use Javascript to hide the div that tells users that they need js enabled (if Javascript is disabled, obviously it cannot hide the div, and it will be shown).
<script>
document.addEventListener("DOMContentLoaded", function() {
document.getElementById('nojs').style.display = "none";
});
</script>

Hiding/showing content whether javascript is enable/disabled

I have seen some posts regarding wanting to do something like this, but I am at a loss to understand why my code doesn't work. I'm trying to make sure that users who visit a page have javascript enabled. If disabled, I want to hide all content and display a simple page with a message that the main page cannot be displayed without javascript.
I have the following:
<html>
<head><title>my site</title>
<noscript><style type="text/css">site {display:none;} </style></noscript>
</head>
<body onload="hideDiv()">
<div id="noscriptmsg">You need to have javascript enabled in order to view this site.</div>
<script type="text/javascript">document.getElementById("noscriptmsg").style.display = 'none';</script>
</body>
<body>
<div class="site">
<!--content -->
</div>
</body>
</html>
Currently this shows the correct javascript-enabled page, but a completely blank javascript-disabled page. What would cause this?
Why not use the build in noscript in one body tag:
<html>
<head><title>my site</title>
</head>
<body>
<noscript>
<style type="text/css">
#site {display:none;}
</style>
<div id="noscriptmsg">
You need to have javascript enabled in order to view this site.
</div>
</noscript>
<div id="site">
</div>
</body>
</html>
It looks like in the body onload you are trying to call the method hideDiv()
First, I'd recommend moving your script tag
<html>
<head><title>my site</title>
<noscript><style type="text/css">.site {display:none;} </style></noscript>
<script type="text/javascript">
// to the head tag
// and define the hideDiv() method
function hideDiv() {
document.getElementById("noscriptmsg").style.display = 'none';
}
</script>
</head>
<body onload="hideDiv()">
<div id="noscriptmsg">You need to have javascript enabled in order to view this site.</div>
<div class="site">
<!--content -->
</div>
</body>
</html>
and remove the extraneous body tags. You can use css to have the first div (the one with the notice) display at 100% width and 100% height. Also, someone pointed out you were missing the css class selector.

Define specific CSS-style only if JavaScript is enabled

My webpage contains a DIV. If Javascript is enabled, I want the DIV to be invisible (display: none;) when the page loads. If JS is disabled, I want it to be visible (display: block;).
I can do:
document.write('<div style="display:none;">...</div>');
or
document.getElementById('foo').style.display = 'none';
With the first code there won't be a DIV if JS is disabled. With the second, the DIV will be visible when the page loads and disappear when the JS is executed.
I'm too stupid to solve this.
Can I put JavaScript inside the <div>-tag to write only the style? Certainly not like this:
<div <script>document.write('style="display:none;"');</script>>
Maybe something like:
<div onLoad="document.write('<div style="display:none;">...</div>');">
Does someone have an idea?
One problem with displaying an element unless JS hides it is that, even with JS on, the element is likely to display until the JS kicks in. So it's often better to have some JS at the top of the file that adds a class to the root element straight away, to get in before the CSS loads. Here's a simple example (in my noob JS):
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<script>
(function() {
var root = document.querySelector('html');
root.className = "js";
}());
</script>
<style media="all">
div {width: 500px; height: 200px; background: blue;}
.js div {display: none;}
</style>
</head>
<body>
<div></div>
</body>
</html>
This is much better than using oldfashioned <noscript> and document.write() etc.
EDIT: I should just note that an easier way to target the html element is with document.documentElement. Thus, the code above could be written as—
<script>
(function() {
document.documentElement.className = "js";
}());
</script>
Why don't you just put the <div> in a <noscript>?
<noscript><div style="display:none;">...</div></noscript>
Now you don't even have to use Javascript to deal with it.

<noscript> tag not working

I've used the <noscript> tag to hide certain elements when javascript is not enabled; however, it doesn't seem to work.
My document declaration:
<!DOCTYPE html>
At the end of my file I typed the following:
<noscript>
<style type="text/css" scoped> #status {display:none;} </style>
</noscript>
</body>
</html>
But the #status div is still present even after disabling JS. Am I missing something here?
Remove the scoped attribute of the style tag. It's making your CSS apply strictly to the <noscript> tag.
If this attribute is present, then style applies only to its parent element.
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/style#Attributes
A simpler to manage solution would be to make the element hidden by default and use this :
<script>document.getElementById('status').style.display='block';</script>
(or an equivalent class based solution)
Try removing the scope of the style, like the code below.
<noscript>
<style type="text/css"> #status {display:none;} </style>
</noscript>
#dystroy's answer is the right way of doing it, because:
<style> elements can't be placed on <body> (except if they have scoped attribute)
<noscript> elements can't be placed on head.
But if you don't want a delay, you can use the following in <head>:
<style id="noScriptSheet" type="text/css">
.onlyScript{ display:none;}
</style>
<script type="text/javascript">
function kill(el){
return el.parentNode.removeChild(el);
}
kill(document.getElementById('noScriptSheet'));
</script>
And add a class to your element:
<div class="onlyScript">Hello world!</div>
Demo: http://jsfiddle.net/TQLfu/
I am adding this answer because this seems to be the most popular SO-question regarding the noscript tag.
It doesn't seem to fire at all with "Sybu JavaScript Blocker". So in case you are testing with that JavaScript blocker try using another JavaScript blocker. When I used "Toggle Javascript" the noscript tag fired without problem. I did not yet discover a way to detect that "Sybu JavaScript Blocker" is being used.
My Testing environment:
Sybu JavaScript Blocker, Version 2.93
Toggle JavaScript, Version 1.3
Chrome, Version 85.0.4183.83

Can I not use embedded <style> CSS on Android?

I'm debugging a site on an Android HTC Sense. The site uses a lot of inserted content, which comes along with it's own CSS and JS like:
// wrapper id = snippet_id
<html>
<head>
<style type="text/css">
#snippet_id div {border: 1px solid red !important;}
div {border: 1px solid blue !important;}
</style>
</head>
<body>
<div>Hello World</div>
</body>
<html>
This is inserted into an existing page, so it sort these snippets are sort of like iFrames I guess.
Question:
Problem is, that while Javascript works fine, all CSS I'm specifying using <style> tags is being ignored. Any idea why?
EDIT:
Works on:
- Android 4.0.1
Does not work on:
- Android 2.3.1
- IOS 4.1
If I add the CSS to the main.css file being requested when the page loads, all is ok. If it's inside my gadget, it's not working.
EDIT:
So from what I can see, <style> does not seem to work on classes and id. If I use regular HTML elements as selectors it works.
EDIT:
My dev-site is here. I'm using a plugin called renderJs, which encapsultes HTML snippets (along with their CSS and JS) into resuable gadgets. Gadgets content will be appended to the page body, so although a gadget can act as a standalone HTML page, it can also be part of a page.
Example code from my page (I stripped out all gadgets but one below):
index.html - include index_wrapper gadget
<!DOCTYPE html>
<html itemscope itemtype="http://schema.org/Organization" lang="en" class="render">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="../css/overrides.css">
<script data-main="../js/main.js" type="text/javascript" src="../js/libs/require/require.js"></script>
<title></title>
</head>
<body class="splash">
<div data-role="page" id="index">
<div id="index_wrapper" data-gadget="../gadgets/index_wrapper.html"></div>
</div>
</body>
</html>
The page has a gadget called index_wrapper link - code below:
<!DOCTYPE html>
<head></head>
<body>
<div id="index_social" data-gadget="../gadgets/social.html"></div>
<p class="mini t" data-i18n="gen.disclaimer"></p>
</body>
</html>
Which has another gadget called social here. This gadget includes some CSS, but on the devices in question, it is ignored (just saw, I'm missing a </div> in the index_wrapper, so trying to see if that fixed the problem, too).
The code below includes my fix:
<!DOCTYPE html>
<head>
<style type="text/css" scoped>
// will be ignroed
.el {width: 1px;}
.menu_social {text-align: center; margin: 1em 0;}
.action_menu {display: inline-block;}
.follow_us {display: inline-block; margin: 0; padding: 0 .5em 0 0;}
...
</head>
<body>
<div class="menu_social">
<div>
<span class="el ui-hidden-accessible"></span><!-- fallback for CSS not working -->
<div data-role="controlgroup" data-type="horizontal" data-theme="c" class="action_menu">
</div>
</div>
</div>
<script type="text/javascript">
//<![CDATA[
(function () {
$(document).ready(function() {
var gadget = RenderJs.getSelfGadget();
// fallback for old devices which cannot load <style> css
if (gadget.dom.find(".el").css('width') !== "1px") {
require(['text!../css/social.css'], function (t) {
var x = '<style>'+t+'</style>';
gadget.dom.append(x);
});
}
// trigger enhancement
$(this).trigger("render_enhance", {gadget: gadget.dom});
});
})();
//]]>
</script>
</body>
</html>
So aside from probably missing a closing </div> I'm still wondering why my embedded CSS is not working.
Looking at the generated HTML code (i.e., code as modified by JavaScript) of the demo page suggests that style elements are generated inside body. Although such elements are allowed by HTML5 drafts when the scoped attribute is present, support to that attribute seems to be nonexistent, and the style sheet is applied globally. It is possible however that some browsers do not apply it at all, at least when the style element is dynamically generated.
A better approach is to make all style sheets global to the document, preferably as external style sheets, and use contextual selectors to limit the rules to some elements only. And possibly using JavaScript to change classes of elements, rather than manipulating style sheets directly.
Ok. Ugly workaround:
In the inline section, set this:
<style>
.el {width: 1px;}
</style>
In the page, set hide an element el like this:
// ui-hidden-accessible is a JQM class, moving the item out of view
// since it uses pos:absolute, is needed to not break
// selects on the page (compare to JQM ui-icon)
<span class="el ui-hidden-accessible"> </span>
Then check for the width when running inline Javascript (which works) and require the inline CSS as a separate file, when the width is not at 1px
// fallback for old devices which cannot load <style> css
// gadget is my iframe-look-a-like
if (gadget.dom.find(".el").css('width') !== "1px") {
require(['text!../css/translate.css'], function (t) {
var x = '<style>'+t+'</style>';
gadget.dom.append(x);
});
}
Ugly and an extra HTTP request, but at least the CSS is working then.

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