I'm trying to use the AngularJS ngDialog add-on to make a simple pop-up dialog. It basically works, but when the dialog appears, it starts out white but then quickly fades into the dark background. I assume there's some CSS conflict, but I can reproduce the problem with a very simple bit of HTML, below. Thanks in advance for any suggestions.
<html>
<head>
<title>Dialog Test</title>
<link href='/assets/ngDialog/css/ngDialog.css' rel='stylesheet'>
<script src='/assets/angularjs/angular.js'></script>
<script src='/assets/ngDialog/js/ngDialog.js'></script>
<script>
angular.module('dialogTest', ['ngDialog']);
</script>
</head>
<body ng-app='dialogTest'>
<button ng-dialog='MY_DIALOG.html'>
Dialog...
</button>
</body>
</html>
I figured it out (my original problem, not plunker): I also need to include ngDialog's ngDialog-theme-default.css. Thanks for looking at this.
Here's a weird one -- something that works great in IE, but not in Safari. Here's my code:
<script type="text/javascript">
$(document).ready(function(){
$('body').css('display', 'block');
});</script>
</head>
<body style="margin:0; display:none;">
The goal is to set the body display to none until the document is ready. Then change the display property to block.
Any idea what I'm doing wrong here?
CAN I ADD some sort of conditional code, such that if javascript is
not enabled it loads immediately, but if it is enabled it waits to
display until the document is ready?
Yes, you can:
<script type="text/javascript">
$(function(){
$('body').css('display', 'block');
});
</script>
</head>
<body>
<script type="text/javascript">
$('body').css('display','none'); // this will execute before $(document).ready()
</script>
You should use jQuery's .load() if you want the page to really be ready (images loaded too) before displaying it. On the other hand, you shouldn't hide the body at all with css, as people with javascript turned off will assume the site just crashed. Unless of course you're creating a 100% javascript dependent application.
my website has an image slider using Jquery. If a user turns off javascript what is the alternative way of just showing a static image?
Use the noscript tag:
<noscript>
<img src="no-js.png" />
</noscript>
If you add:
<img id="fallback" src="fallback.jpg"/>
in the area you want the fallback image to go, you can add the following javascript:
document.getElementById("fallback").style.display = "none";
This will hide the image when javascript is enabled and the image will be displayed if javascript is not present.
The HTML noscript tag
<script type="text/javascript">
...
</script>
<noscript>
...
</noscript>
How can i make an iframe the absolute size of a web browser? I'm playing around with this (http://liquor.com/askmen-jardiniere/) yet whatever I do in Firebug it's showing scrollers on the right and bottom. I've set the width/height to 100% but that doesn't work, auto width/height won't work, even setting scroller="no" or scrolling="no" isn't working.
Seeking a guru to lend a hand if possible. Any help would be greatly appreciated.
[EDIT]
Aha I found the Answer (at least it seems like it):
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8"/>
</head>
<body style="paddin:0px;margin:0px;">
<iframe src="http://liquor.com/askmen-jardiniere/" scrolling="no" style="width:100%;height:100%;border:none;"/>
</body>
</html>
This is because browsers have default stylesheets and the put paddings for the Body tag.
How do I stop the flash of unstyled content (FOUC) on a web page?
The problem with using a css style to initially hide some page elements, and then using javascript to change the style back to visible after page load, is that people who don't have javascript enabled will never get to see those elements. So it's a solution which does not degrade gracefully.
A better way therefore, is to use javascript to both initially hide as well as redisplay those elements after page load. Using jQuery, we might be tempted to do something like this:
$(document).ready(function() {
$('body').hide();
$(window).on('load', function() {
$('body').show();
});
});
However, if your page is very big with a lot of elements, then this code won't be applied soon enough (the document body won't be ready soon enough) and you might still see a FOUC. However, there is one element that we CAN hide as soon as script is encountered in the head, even before the document is ready: the HTML tag. So we could do something like this:
<html>
<head>
<!-- Other stuff like title and meta tags go here -->
<style type="text/css">
.hidden {display:none;}
</style>
<script type="text/javascript" src="/scripts/jquery.js"></script>
<script type="text/javascript">
$('html').addClass('hidden');
$(document).ready(function() { // EDIT: From Adam Zerner's comment below: Rather use load: $(window).on('load', function () {...});
$('html').show(); // EDIT: Can also use $('html').removeClass('hidden');
});
</script>
</head>
<body>
<!-- Body Content -->
</body>
</html>
Note that the jQuery addClass() method is called *outside* of the .ready() (or better, .on('load')) method.
This is the one that has worked for me and does not require javascript and it works great for pages with many elements and lots of css:
First, add a dedicated <STYLE> setting for the <HTML> tag with visibility 'hidden' and opacity as '0' at the top of your HTML, e.g, in the beginning of the <HEAD> element, for example, at the top of your HTML add:
<!doctype html>
<html>
<head>
<style>html{visibility: hidden;opacity:0;}</style>
Then, at the end of your last .css stylesheet file, set the visibility and opacity styles to 'visible' and '1', respectively:
html {
visibility: visible;
opacity: 1;
}
If you already have an existing style block for the 'html' tag, then move the entire 'html' style to the end of the last .css file and add the 'visibility' and 'opacity' tags as described above.
https://gist.github.com/electrotype/7960ddcc44bc4aea07a35603d1c41cb0
A CSS-only solution:
<html>
<head>
<style>
html {
display: none;
}
</style>
...
</head>
<body>
...
<link rel="stylesheet" href="app.css"> <!-- should set html { display: block; } -->
</body>
</html>
As the browser parses through the HTML file:
The first thing it will do is hide <html>.
The last thing it will do is load the styles, and then display all the content with styling applied.
The advantage to this over a solution that uses JavaScript is that it will work for users even if they have JavaScript disabled.
Note: you are allowed to put <link> inside of <body>. I do see it as a downside though, because it violates common practice. It would be nice if there was a defer attribute for <link> like there is for <script>, because that would allow us to put it in the <head> and still accomplish our goal.
A solution which doesn't depend on jQuery, which will work on all current browsers and do nothing on old browsers, include the following in your head tag:
<head>
...
<style type="text/css">
.fouc-fix { display:none; }
</style>
<script type="text/javascript">
try {
var elm=document.getElementsByTagName("html")[0];
var old=elm.class || "";
elm.class=old+" fouc-fix";
document.addEventListener("DOMContentLoaded",function(event) {
elm.class=old;
});
}
catch(thr) {
}
</script>
</head>
Thanks to #justastudent, I tried just setting elm.style.display="none"; and it appears to work as desired, at least in current Firefox Quantum. So here is a more compact solution, being, so far, the simplest thing I've found that works.
<script type="text/javascript">
var elm=document.getElementsByTagName("html")[0];
elm.style.display="none";
document.addEventListener("DOMContentLoaded",function(event) { elm.style.display="block"; });
</script>
An other quick fix which also works in Firefox Quantum is an empty <script> tag in the <head>. This however, penalizes your pagespeed insights and overall load time.
I had 100% success with it. I think it's also the main reason, why above solutions with other JS in the works.
<script type="text/javascript">
</script>
None of the CSS-only solutions presented here work with modern browsers (asynchronous loading of css and fonts). You have to use Javascript. What I've done to avoid FOUC is:
<html>
<body onload="document.body.style.visibility=`visible`;">
<script>document.body.style.visibility=`hidden`;</script>
With this approach the body of my web page is kept hidden until the full page and CSS files are loaded. Once everything is loaded, the onload event turns the body visible. So, the web browser remains empty until a point when everything pops up on the screen.
It is a simple solution but so far it is working.
This will not affect users who have disabled Javascript because the <script> tag is ignored.
No one has talked about CSS #import
That was the problem for me i was loading two extra style sheets directly in my css file with #import
Simple solution: Replace all #import links with <link />
Every answer on this page slows down the load and it only hides the underlying issue. If you're experiencing FOUC, find out WHY it's happening and fix that.
At the core, this is happening:
because your stylesheets are not being loaded correctly: they should be loaded via link tag in the HTML, not via JavaScript
because you placed script tags before link tags, which may force a "layout operation" and trick the browser into rendering before it even attempts to load the style.
For reference, here's an example of FOUC:
I came up with a way that requires no real code change whatsoever, woohoo! My issue was related to importing several css files AFTER some javascript files.
To resolve the issue I just moved my CSS links so that they would be above my javascript imports. This allowed all my CSS to be imported and ready to go ASAP, so that when the HTML appears on the screen, even if the JS isn't ready, the page will be properly formatted
Here is my code .. hope it solve your problem
set <body style="opacity:0;">
<script>
$(document).ready(function() {
$("body").css('opacity', 1);
});
</script>
A simple solution to avoid a flash of unstyled content without javascript:
<!DOCTYPE html>
<html>
<head>
<title>Bla bla</title>
<link href="..." rel="stylesheet" />
<link href="..." rel="stylesheet" />
</head>
<body style="opacity: 0">
<!-- All HTML content here -->
<script src="..."></script>
<script src="..."></script>
<style>
body {
opacity: 1 !important;
}
</style>
</body>
</html>
When the parser arrives at the body, it is faded out using "opacity: 0". When the parser finally arrives at the very bottom after everything else is parsed, the body is faded in again using an in-page style. The !important keyword there is important ;-), because it overrules the previous inline style of the body tag.
In this case, using "opacity: 0" to fade out is better than "display: none", because if you have layout operations done by javascript, they may not work when the affected element is not rendered.
That worked for me.
The best solution I found till now is like this:
Add all styles of your header to a <style/> tag in <head/>
at the top of style tag add .not-visible-first{visibility: hidden} + other header style
Add css via JS at the end of body
document.getElementsByTagName("head")[0].insertAdjacentHTML("beforeend","<link rel=\"stylesheet\" href=\"/css/main.min.css?v=1.2.4338\" />");
And remember to add .not-visible-first{visibility: visible} to the end of main.min.css
This option will create better user experience
You could try this with vanilla
function js_method(){
//todos
var elementDiv = document.getElementById("main");
elementDiv.style.display ="block";
}
<body onload="js_method()" id="main" style="display:none">
//todos
<h2>Hello</h2>
</body>