This question already has answers here:
No-Javascript Detection Script + Redirect
(4 answers)
Closed 6 years ago.
I need to show COMPLETELY different content when JavaScript is disabled. I know I can use <noscript> tag... but how can I hide the rest of the page when JavaScript is disabled?
Thanks.
here is another solution:
inside your head below your normal stylesheet have:
<link rel="stylesheet" href="jsdisabled.css" />
<script type="text/javascript">
document.write('<link rel="stylesheet" href="jsenabled.css" />');
</script>
that jsenabled.css would have:
#content { display:block; }
while jsdisabled.css would have:
#content { display:none; }
although the solution below works it does not validate
inside your noscript tag you can put some style tag that hides the rest of your content
ie:
<noscript>
<style type="text/css">
#content { display:none; }
</style>
no js content goes here.
</noscript>
<div id="content">
content here.
</div>
I like using this method because it doesn't make the page flash when javascript is enabled.
I would not use noscript to show alternate content. For one, only a limited number of tags are valid in a <noscript> tag, and <style> is not one of them. Instead, take a different approach. Have your content when javascript is disabled visible by default, and show alternate content when JavaScript is enabled. The best way to do this is with simple CSS and one line of JS. If you do it as I show here, there should not be an awkward flash of content:
<head>
...
<script type="text/javascript"> document.documentElement.className += " js"</script>
<link type="text/css" href="css/style.css" media="all" rel="stylesheet" />
</head>
<body>
<div id="header" class="no_js">header</div>
<div id="alt_header" class="js">header</div>
.. etc ..
<div id="super_duper" class="js">Whatever</div>
</body>
Just apply js to everything that should show when JavaScript is enabled, and no_js to everything else. Then in your CSS put this:
html.js .no_js, html .js { display: none }
html.js .js { display: block }
Use meta tags to redirect to a different page.
<noscript>
<meta http-equiv="refresh" content="2; URL=enable_javascript.php">
</noscript>
You could use Javascript to switch to a different page containing Javascript.
For example:
<script type="text/javascript">
location = "JSEnabled.html";
</script>
Non-javascript content goes here
All the above are fine, I believe.
Just an alternative, you can try this,
<head>
<script type="text/javascript">
//if javascript enabled
window.onload=function(){
document.getElementById('jsContentWrapper').style.display='block';
}
</script>
</head>
<body>
<div id='jsContentWrapper' style='display:none;'>
---
--
-
</div>
<noscript>
Place your javascript disabled content here
</noscript>
</body>
Thanks.
Setup a div tag with the id of content. Add the content you want displayed when javascript is disabled. Use jquery $("#content ").load("content.html") to load content if javascript is enabled.
Related
The below Jquery does not run within my browser even though the syntax is correct( checked via online syntax checker) and the functions do run (tested with pure JS). Why is it that so?
I apologize in advance if the answer to this question is rather simple but after 15min of googling I could not arrive at an answer.
JAVASCRIPT:
document.getElementById('overlay').addEventListener('click', function( {
closeLightBox()
});
function closeLightBox() {
$("#overlay").fadeOut(1000);
}
function lightbox(x) {
}
HTML
<!DOCTYPE html>
<html>
<head>
<title> Lightbox </title>
<link rel="stylesheet" type="text/css" href="lightboxcss.css">
</head>
<body>
<div id = "overlay"> </div>
<img src="batman.jpg" alt="" href="javascript:void(0)" onclick="lightbox(1)" id="batman" style="height:100px;width:160px;margin-left:45%;margin-top:16%;">
<br><br><br><br>
<p> RANDOM TEXT STUFF </p><br><br>
<p> 328ueekfuuirgh40t43h8hohro8ht </p>
<script src="lightboxjs.js"> </script>
</body>
</html>
I assume that javascript code is located in your .js file "lightboxjs.js". Did you include the jQuery library anywhere?
If you don't, start by adding this line <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script> before including your custom javascript file.
$(document).ready(function(){
//page is ready
$("#overlay").on("click",function(){
this.fadeOut(1000);
});
});
You cannot add an eventlistener if the dom isnt loaded. Also dont forget to include jquery before executing the upper script
...
Where are you calling the jquery lib? You need to load the jquery just above lightboxjs.js and may as well use jquery syntax to listen to the #overlay click event.
I am having some dynamic content that should be shown only in the printing page and not in the web page using CSS or javascript.
Please help me to do this.
For example;
I am having a div content like this..
echo '<div id="noshow">'.$val.'</div>'; //i am using php and $val is a dynamic value.
I need to show this value only in the printing page and not in the browser page. I used display:none. But, I don't know how to make it to display again in the printing page.
In you're regular stylesheet you could use #media queries for your print css...
#media print {
#hid { display: table-row; }
}
or you could add a print style.css to the head of your page with the media attribute.
<head>
<link rel="stylesheet" type="text/css" href="style.css">
<link rel="stylesheet" type="text/css" href="print.css" media="print">
</head>
You need to have two sets of CSS. One that is specifically around displaying to the browser and one that is for printing.
Look in to http://printstylesheet.dbushell.com/
Cheers
Truez
I have an element which has to be hidden when JavaScript is enabled. The current code seems like this:
<body>
...
<div id="js-hidden"></div>
...
<script src="jquery.js"></script>
<script>
$(document).ready(function() {
$('#js-hidden').hide();
})
</script>
There is the problem, the js-hidden div is visible since the rest of page (and JavaScripts) are loaded.
Can I hide that earlier? This solution is so bad for me, JS user can´t see this element.
PS: I've written the example with using jQuery, it can be in plain JS too, of course :-)
$(document).ready makes it happen after full page loaded you can use
<body>
...
<div id="js-hidden"></div>
...
<script src="jquery.js"></script>
<div id="js-hidden"></div>
<script>
$('#js-hidden').hide();
</script>
Simplest thing:
<style>
.js-hidden {
display: none;
}
</style>
<noscript>
<style>
.js-hidden {
display: block;
}
</style>
</noscript>
Since you cannot use onload event on div I guess the best solution is put your js right after that div...
I'm writing text to a page using document.write for a Chrome extension, but the associated custom CSS isn't applied:
<!DOCTYPE html>
<html>
<head>
<title>TITLE GOES HERE</title>
<link rel="stylesheet" href="css/popup.css" type="text/css" />
</head>
<body>
<script type="text/javascript">
...
function showFolder(folder) {
console.debug('FOLDER: '+folder.title);
document.write('<p>'+folder.title+'<br></p>');
}
</script>
</body>
</html>
The CSS is simple, just for debugging:
p {
color: red;
}
I can get it to work if I put the stylesheet link inside the function showFolder, but that can't be the proper way to do it. I'm learning jscript/CSS on the fly, so the answer is probably something remedial. Is the problem in the jscript, the CSS or both?
Use innerHTML.
<div id="towrite"></div>
then you can write in it like this:
div=document.getElementById('towrite');
div.innerHTML = '<p>'+folder.title+'<br></p>';
If you run your document.write() before the page finishes loading (perhaps calling your showFolder call directly from a script on the page), then the text will be written into the document as you might expect.
However, if you call document.write after the page loads, as in an event handler, you will be writing an entirely new page. This is usually not what you want.
Instead, follow Zoltan's advice and set the innerHTML property of an empty div.
I'm not javascript expert... I mainly use jQuery.. but try this, kind of makes sense:
<!DOCTYPE html>
TITLE GOES HERE
<script type="text/javascript">
...
function showFolder(folder) {
console.debug('FOLDER: '+folder.title);
document.write('<p>'+folder.title+'<br></p>');
}
</script>
<link rel="stylesheet" href="css/popup.css" type="text/css" />
EDIT:
So the above didn't work, but I just thought about another solution. When are you actually calling the function? Try to put it in <body onLoad="functionnamehere()">
No idea if that works, but give it a try.
So I was thinking a simple way to deal with javascript being disabled by the browser would be the following:
<head>
<title>JavaScript Test</title>
<noscript>
<meta http-equiv="Refresh"
content="1;url=nojs.html" />
</noscript>
</head>
And having the nojs.html have something like:
<p>Return to test after enabling javascrpt.</p>
At the crash page.
This isn't my preferred method, but it's nice and simple until something more graceful can be worked out for users without javascript.
However, it is not valid to put a <noscript> element in the head section. The preliminary tests worked anyway, of course, but I'm superstitious when it comes to my code being valid, plus I'd hate for this to actually fail a field test.
So is there a valid way to do this? Perhaps wrapping the noscript in another element, like an object tag? Or some even simpler way I'm not thinking of?
I am not sure why you need to redirect to another page instead of just showing a message. I use JS and a little CSS to handle these situations for me. Something like this:
<head>
....
<script type="text/javascript"> document.documentElement.className += " js"</script>
<link rel="stylesheet" type='text/css' href="css/layout.css" media="all" />
</head>
<body>
<div id="noscript">Please enable JavaScript, then refresh this page. JavaScript is required on this site</div>
<div id="wrapper">
...
</div>
</body>
Then in layout.css:
#wrapper { display: none } /* Hide if JS disabled */
.js #wrapper { display: block } /* Show if JS enabled */
.js #noscript { display: none } /* Hide if JS enabled */
By doing it this way, the class is applied to the html element before the page is rendered so you won't get a flicker as the non-JS content is swapped out for the JS content.
Doug's solution is pretty good, but it has a few drawbacks:
It is not valid to have a class attribute on the html element. Instead, use the body.
It requires that you know what display type to set the element to (i.e. ".js #wrapper { display: block }").
A simpler, more valid and flexible solution using the same approach could be:
<html>
<head>
<!-- put this in a separate stylesheet -->
<style type="text/css">
.jsOff .jsOnly{
display:none;
}
</style>
</head>
<body class="jsOff">
<script type="text/javascript">
document.body.className = document.body.className.replace('jsOff ','');
</script>
<noscript><p>Please enable JavaScript and then refresh the page.</p></noscript>
<p class="jsOnly">I am only shown if JS is enabled</p>
</body>
</html>
With this, it's valid html (no class attribute on the html element). It is simpler (less CSS). It's flexible. Just add the "jsOnly" class to any element that you want to only display when JS is enabled.
The <noscript> tag cannot be in the <head>, it must be in the <body>
The common practice is to show a message instead of redirecting, as there is no way to redirect only if javascript is disabled.
You could do it the other way around, have the first page be nojs.html, and on that page use javascript to redirect to the main content.
If you truly want a valid way to do it, make your main page the nojs.htm page and use JS to hide all content before it's shown to the user and immediately redirect to the real main page using javascript.
I like Doug's solution. However, if you need to redirect, I would remember that while there is a spec and a standard, the world of web browsers is a dirty, imperfect world. Whether or not something is allowed by the spec is not as important as whether or not it works in the set of browsers you care about.
Just look at the source code of any major site... Most of them won't validate I'd bet :)
What about:
noscript{
z-index:100;
position:absolute;
top:0;
left:0;
width:100%;
height:100%;
min-height:1024px; background:#FFF;
}
And:
<noscript>
<p>Please enable Javascript on your browser.</p></noscript>