How can I prevent CSS from affecting certain element? - css

I am writing a GreaseMonkey script that sometimes creates a modal dialog – something like
<div id="dialog">
Foo
</div>
. But what can I do if the site has something like
#dialog {
display: none !important;
}
? Or maybe the owner of some site is paranoid and has something like
div {
display: none !important;
}
div.trusted {
display: block !important;
}
because he doesn't want people like me adding untrusted content to his page. How can I prevent those styles from hiding my dialog?
My script runs on all pages, so I can't adapt my code to each case.
Is there a way to sandbox my dialog?

Actually a very interessting problem, here is another approach:
adding an iframe and modifying it creates a seperate css space for you (your sandbox)
look at this jsfiddle example: http://jsfiddle.net/ZpC3R/2/
var ele = document.createElement("iframe");
ele.id = "dialog";
ele.src = 'javascript:false;';
ele.style.height = "100px";
ele.style.width = "300px";
ele.style.setProperty("display", "block", "important");
document.getElementById("dialog").onload = function() {
var d = document.getElementById("dialog").contentWindow.document;
// ... do your stuff within the iframe
};
this seems to work without problem in firefox.
now you only have to make sure that the iframe is untouched, you can do this they way i described in my 1. answer

just create the div like this:
var ele = document.createElement("div");
ele.style.setProperty("display", "block", "important");
that should overwrite all other styles afaik.
look here, it seems to work: http://jsfiddle.net/ZpC3R/

Related

if image width > 400 = image width = 100% css

I'd like to check if an image width has more than 400px I'd like this image to get full div width. if image is less than 400px just print it in its normal size.
any ideas how to do this?
<div id="volta">
<img src="/img/volta.jpg">
</div>
#volta{
width:500px;
}
As far as I know, this does not exist in CSS. What you should do instead is use classes.
Define some CSS class that applies the styles you want:
.long_width {
background: blue;
}
Then you would use Javascript to check the width of the image. You don't need jQuery to do this you can do it in vanilla Javascript (unless you already have jQuery imported and need it for other things). Maybe something like this:
let elm = document.querySelector('[src="/img/volta.jpg]"');
let width = window.getComputedStyle(elm).getPropertyValue('width');
And then you would use Javascript to add and remove styles accordingly:
if (width > 400) {
elm.classList.add("long_width");
}
else {
elm.classList.remove("long_width");
}
The specific answer to your question depends on what your intentions are. But to keep your code simple, you should use Javascript to handle the logic and not depend on CSS selectors for things this complicated. Instead, create a CSS class that contains the styles you need, and then use Javascript to apply it based on the size of the user uploaded image.
Additionally, if the user uploads the image, you should load it into memory and check its attributes in memory rather than by depending on a DOM element. Something like:
let img = new Image();
img.src = "{data URL of img}"
You will need javascript / jQuery to work. Something like this:
$('img').each(function(){
if($(this).width() > 400){
$(this).css('width', '100%');
}
});
Here is also working jquery example.
Apply an id to the image, and with jquery check its width
If it is greather than 400px modify his width or add a class that does the same.
Example
$(document).ready(function(){
if($("#image").width() > 400){
$("#image").css("width", "100%");
}
else{
$("#image").css("width", "10px");
}
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<img id = "image" src = "https://pm1.narvii.com/6919/98f453834b5d87a6c92118da9c24fe98e1784f6ar1-637-358v2_hq.jpg"/>
You can do it like FlokiTheFisherman (with %), or you can use "wv" instead of "%".
I recommend using vw.
img[width='400'] {
width: 100%;
}

Anyone have solutions for table>th with position:sticky not working on FF & IE?

I have an idea to make sticky header of table and I have tried with position:sticky. It's
working fine on Chrome but on Firefox and IE not working as I think. Below is my CSS
.myTable--mof thead th {
position: -webkit-sticky;
position: sticky;
top: 0;
z-index:100;
}
position:sticky is not supported for child table elements in some browsers. The 'why' I don't know.. Will it be supported in the future? I sure hope so!
I recently wrote this jQuery solution. It'll work for simple tables with simple headers. Does not look for colspans or multiple rows in thead!
I tried some plugins before, but they all listened for the scroll event which throws alerts in some browsers. They caused flickering/jumping in some cases, and a delay was noticable when hitting the position to stick at.
Using position:sticky for other elements and liking those transitions more, I came up with the following piece of code.
jQuery.fn.stickTableHeaders = function() {
return this.each(function()
{
var table = $(this),
header = table.find('thead'),
sticked = $('<table></table>').addClass('table').append(header.clone()); // Needs to be wrapped in new table since table child elements can't be sticky? (FF)
sticked.find('th').css({ // You'll have to copy the original thead (th's) CSS manualy
'backgroundColor': '#DEE5EA',
'color': '#606060',
'padding':'8px',
'color':'#606060'
}).removeAttr('width'); // And remove the width attr from the clone th's since we'll be setting them again later
sticked.find('th:not(:last-child)').css({ // More CSS
'borderRight': '1px solid #ddd'
});
sticked.find('a').css({ // More CSS
'color':'#606060'
});
// I tried different things, most of the original th's should have a width attribute set (not in CSS and avoid percent) for best results
$(window).resize(function() {
sticked.width(table.width());
sticked.find('th').each(function() {
var headerTH = header.find('th').eq($(this).index());
if(headerTH.is('[width]') || headerTH.is(':first-child') || headerTH.is(':last-child')) { // First and last th are allready calculated by another function in my app. See what suits for you here...
$(this).width(header.find('th').eq($(this).index()).width());
}
else {
var cellWidth = header.find('th').eq($(this).index()).width(true),
tableWidth = table.width(true),
percent = 100*(cellWidth/tableWidth);
$(this).css({'width':percent+'%'});
}
});
// We keep the original thead to avoid table collapsing, we just slide the whole table up.
table.css({
'marginTop':-header.height()
});
}).trigger('resize');
// Apply stickyness
sticked.css({
'display':'table',
'position':'sticky',
'top':$('#header-menu').height(), // My sticky nav is my top position, adjust this to your needs
'zIndex':'10'
});
// Insert clone before original table
$(this).before(sticked);
});
};
Now I just use this on each page load:
$("table").stickTableHeaders();
You might want to filter out nested tables from the above selector...
Hope this helps someone.

Styling Google Translate widget for mobile websites

My website - www.forex-central.net - has the Google Translate drop-down widget on the top right of every page.
Only problem is it's a bit too wide for my website (5 cm), I would need a 4 cm version (which I've seen on other sites so I know this is possible)...but I have no idea how to tweak the code.
The code Google supplies for the widget I use is:
<script type="text/javascript">function googleTranslateElementInit() { new google.translate.TranslateElement({ pageLanguage: 'en', gaTrack: true, layout: google.translate.TranslateElement.InlineLayout.SIMPLE }, 'google_translate_element');}</script><script type="text/javascript" src="//translate.google.com/translate_a/element.js?cb=googleTranslateElementInit"></script>
Any help would be greatly appreciated! I'm a bit of a novice and have searched for hours on this, not getting anywhere :-/
Something like this will get you started:
.goog-te-menu-frame {
max-width:100% !important; //or whatever width you want
}
However, you would also need to do something like:
.goog-te-menu2 { //the element that contains the table of options
max-width: 100% !important;
overflow: scroll !important;
box-sizing:border-box !important; //fixes a padding issue
height:auto !important; //gets rid of vertical scroll caused by box-sizing
}
But that second part can't actually be done because the translate interface is included in your page as an iframe. Fortunately, it doesn't have its own domain, so we can access it via Javascript like this:
$('.goog-te-menu-frame').contents().find('.goog-te-menu2').css(
{
'max-width':'100%',
'overflow':'scroll',
'box-sizing':'border-box',
'height':'auto'
}
)
But that won't work until the element actually exists (it's being loaded asynchronously) so we have to wrap that in something that I got here. Put it all together, you get this:
function changeGoogleStyles() {
if($('.goog-te-menu-frame').contents().find('.goog-te-menu2').length) {
$('.goog-te-menu-frame').contents().find('.goog-te-menu2').css(
{
'max-width':'100%',
'overflow':'scroll',
'box-sizing':'border-box',
'height':'auto'
}
)
} else {
setTimeout(changeGoogleStyles, 50);
}
}
changeGoogleStyles();
Whew.
You can use that same strategy to apply other styles to the translate box or perhaps alter the table styles to have it flow vertically instead of scroll horizontally offscreen, whatever. See this answer.
EDIT:
Even this doesn't work, because Google re-applies the styles every time you click the dropdown. In this case, we try and change height and box-sizing, but Google reapplies over those, while overflow and max-width stick. What we need is to put our styles somewhere they won't get overriden and add !importants [cringes]. Inline styles will do the trick (I also replaced our selector with a variable for succinctness and what is likely a negligible performance boost):
function changeGoogleStyles() {
if(($goog = $('.goog-te-menu-frame').contents().find('body')).length) {
var stylesHtml = '<style>'+
'.goog-te-menu2 {'+
'max-width:100% !important;'+
'overflow:scroll !important;'+
'box-sizing:border-box !important;'+
'height:auto !important;'+
'}'+
'</style>';
$goog.prepend(stylesHtml);
} else {
setTimeout(changeGoogleStyles, 50);
}
}
changeGoogleStyles();
The Google Translate widget creates an iframe with content from another domain (several files from Google servers). We would have to manipulate the content inside the iframe, but this so-called cross-site scripting did not work for me. I found another solution. I downloaded two of the many files which the widget uses, so I could edit them.
Bear in mind that Google can change its API anytime. The hack will have to be adapted then.
Prerequisite:
I assume that the widget is working on your website. You just want to fit it on smaller screens. My initial code looks like:
<div id="google_translate_element"></div>
<script type="text/javascript">
function googleTranslateElementInit()
{
new google.translate.TranslateElement({pageLanguage:'de', layout: google.translate.TranslateElement.InlineLayout.SIMPLE}, 'google_translate_element');
}
</script>
<script type="text/javascript" src="//translate.google.com/translate_a/element.js?cb=googleTranslateElementInit"></script>
If your initial code looks different, you might have to adapt your solution accordingly.
Special tools used:
Chrome DevTools (adapt for other browsers)
Procedure:
In Google Chrome, right-click on your page containing the Google Translate widget.
Click Inspect. A window or side pane will apper with lots of HTML info.
In the top line, select the Sources tab.
Browse the sources tree to
/top/translate.google.com/translate_a/element.js?cb=googleTranslateElementInit
Click the file in the tree. The file content will be shown.
Under the code window of element.js, there is a little button with two curly brackets { }. Click this. It will sort the code for better readability. We will need this readability in the next steps.
Right-click inside the element.js code > Save as…. Save the file inside the files hierarchy of your website, in my case:
/framework/google-translate-widget/element.js
Point your <script> tag to the local element.js.
<!--<script type="text/javascript" src="//translate.google.com/translate_a/element.js?cb=googleTranslateElementInit"></script>-->
<script type="text/javascript" src="../framework/google-translate-widget/element.js?cb=googleTranslateElementInit"></script>
From now on, your website should load element.js from its local directory. Now is a good moment to check if your Google Translate widget still works. Also check in Chrome DevTools where the browser has taken the file from (Google server or local directory). It should sit in the sources tree under
/top/[your domain or IP]/framework/google-translate-widget/element.js?cb=googleTranslateElementInit
We need another file from Google servers. Browse the sources tree to
/top/translate.googleapis.com/translate_static/css/translateelement.css
Download this file after clicking the curly brackets { }. I saved it in my website files directory as
/framework/google-translate-widget/translateelement.css
In your website files directory, open element.js and change line 66:
//c._ps = b + '/translate_static/css/translateelement.css';
c._ps = '/framework/google-translate-widget/translateelement.css';
From now on, your website will also load translateelement.css from its local directory. Check this now.
Open your local translateeleent.css and append the following styles at the end:
/* Make all languages visible on small screens. */
.goog-te-menu2 {
width: 300px!important;
height: 300px!important;
overflow: auto!important;
}
.goog-te-menu2 table,
.goog-te-menu2 table tbody,
.goog-te-menu2 table tbody tr {
width: 100%!important;
height: 100%!important;
}
.goog-te-menu2 table tbody tr td {
width: 100%!important;
display: block!important;
}
.goog-te-menu2 table tbody tr td .goog-te-menu2-colpad {
visibility: none!important;
}
I borrowed the code from another answer: Google translate widget mobile overflow
The geometry might work now, but we broke another thing. The widget text showing “Select Language”, “Sélectionner une langue”, or whatever it says in you language, is locked to that language now. Since you want your other-language readers to understand the offer, the widget should adapt to their language as it used to work before our hack. Also, the listed languages’ names are affected. The reason for this bug can be found in the file element.js, which was silently tailored to our browser’s language setting. Look in element.js on lines 51 and 69
c._cl = 'fr';
_loadJs(b + '/translate_static/js/element/main_fr.js');
In my case, it was set to French (fr).
Correcting line 51 is as simple as
c._cl = 'auto'; //'fr';
Line 61 is trickier, because there is no 'auto' value available. There is a file main.js (without the _fr ending) available on Google servers, which provides English as a fallback, but we prefer the user’s language. Have a look in the file
/top/translate.googleapis.com/translate_a/l?client=…
It contains two objects. sl and tl meaning the source languages and target languages supported for translation. We have to check if the user’s browser is set to one of the target languages. There is a JavaScript constant navigator.language for this.
Edit element.js at line 69:
// determine browser language to display Google Translate widget in that language
var nl = navigator.language;
var tl = ["af","sq","am","ar","hy","az","eu","bn","my","bs","bg","ceb","ny",
"zh-TW","zh-CN","da","de","en","eo","et","tl","fi","fr","fy","gl",
"ka","el","gu","ht","ha","haw","iw","hi","hmn","ig","id","ga","is",
"it","ja","jw","yi","kn","kk","ca","km","rw","ky","ko","co","hr",
"ku","lo","la","lv","lt","lb","mg","ml","ms","mt","mi","mr","mk",
"mn","ne","nl","no","or","ps","fa","pl","pt","pa","ro","ru","sm",
"gd","sv","sr","st","sn","sd","si","sk","sl","so","es","sw","su",
"tg","ta","tt","te","th","cs","tr","tk","ug","uk","hu","ur","uz",
"vi","cy","be","xh","yo","zu"];
var gl = "";
if( tl.includes( nl )) gl = '_'+nl;
else
{
nl = nl.substring(0, 3);
if( tl.includes( nl)) gl = '_'+nl;
else
{
nl = nl.substring(0, 2);
if( tl.includes( nl)) gl = '_'+nl;
else gl = '';
}
}
_loadJs(b + '/translate_static/js/element/main'+gl+'.js');
//_loadJs(b + '/translate_static/js/element/main_fr.js');
… should do the trick.
Try using this in your CSS
.pac-container, .pac-item { width: 100px !important;}
where you can alter the with of the dropdown by altering 'the 100px' value.
This should work. Let me know if it doesn't and I'll have another look.

Hide a whole div with CSS with part of it is empty

Is there a way to hide a whole div if part of it is empty? For example if "dd" is empty as shown below can I hide the whole class "test" so the keyword Restrictions does not show either. I tried .test dd:empty { display: none; } but this does not work. thanks!
<div class="test"><dt>Restrictions:</dt>
<dd></dd></div>
I don't think there's any easy way to do what you're talking about with just CSS. Better to test it server-side if you can. But if you can't here's some JS that will do the job.
<script type="text/javascript">
// handles multiple dt/dd pairs per div and hides them each conditionally
function hideIfEmpty() {
// get all the elements with class test
var els = document.getElementsByTagName('dl');
// for every 'test' div we find, go through and hide the appropriate elements
Array.prototype.map.call(els, function(el) {
var children = el.childNodes;
var ddEmpty = false;
for(var i = children.length - 1; i >= 0; i--) {
if(children[i].tagName === 'DD' && !children[i].innerHTML.trim()) {
ddEmpty = true;
} else if(children[i].tagName === 'DT') {
if(ddEmpty) {
children[i].style.display = 'none';
}
// reset the flag
ddEmpty = false;
}
}
});
}
window.addEventListener('load', hideIfEmpty);
</script>
<div class="test">
<div style="clear: both;"></div>
<dl>
<dt>Restrictions:</dt>
<dd></dd>
<dt>Other Restrictions:</dt>
<dd>Since I have content, I won't be hidden.</dd>
</dl>
</div>
Just a fair warning: the code uses some functions that may not exist in older IE, such as Array.prototype.map, String.prototype.trim, and addEventListener. There are polyfills available for these and you could also write your own pretty easily (or just do it with a for loop instead).
CSS alone can't do that. Either, you need a javascript to retrieve empty elements and hide their parents, or your CMS applies special CSS classes if there's no content.
Put as an answer as requested by #Barett.
You could update your CSS to be
.test{
display: none;
color: transparent;
}
This would make the text transparent too, but display:none should hide it anyway.
To make the div with the id test ONLY show when the dd tag is EMPTY, and you can use jQuery, try the following JavaScript along with the CSS:
if($("dd").html().length ==0)
{show();
}
Note: this solution requires jQuery, which is a JavaScript library.

Remove href link from images with overlay

I need to turn the products listed in http://srougi.biz/gb/portfolio_listing/ into non-clickable items, but without loose its overlay effect. And since its a wordpress site, that I can't change the code, my only option is do it with CSS. I've tried to put pointer-events:none and cursor:default in the image, but it lost its overlay effect. I will appreciate your help.
we don't have a option to handle the events in css. use this jquery snippet to fix
$('.isotope-item .thumbnail a').click(function(e) e.preventDefault();
});
To deactivate the links in this case, you need to add some javascript code.
JS: Add this before </body> in the theme file: footer.php
<script>
var thumbnails = document.getElementsByClassName('thumbnail');
for(i = 0; i < thumbnails.length; i++){
thumbnails[i].getElementsByTagName("a")[0].setAttribute("onclick", "return false;");
}
</script>
CSS: Style to remove pointer from link.
.thumbnail a {
cursor: default !important;
}

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