There are many examples of the following before pseudo technique. But for whatever reason, I'm not seeing the checkmark in Safari and Chrome. Anyone know what is wrong?
CSS
a:visited:before {
content: "\2713 ";
}
Webpage content
is a link
http://jsfiddle.net/NG5KX/1/
Styling for :visited has been significantly curtailed to prevent security loopholes, see this this from mozilla
Indeed, :visited and :link items can only be styled by color (SEC7115)
This is because it was almost remove (but some styles such as colors) to prevent security flaws. It was possible to read your whole browser history with.
A small script could easily create links and then check if it has been visited by looking at the style.
More explanation :
http://www.theregister.co.uk/2010/12/03/browser_history_sniffing/
http://krebsonsecurity.com/2010/12/what-you-should-know-about-history-sniffing/
I'm working on a web page in Google Chrome. It displays correctly with the following styles.
table {
display: table;
border-collapse: separate;
border-spacing: 2px;
border-color: gray;
}
It is important to note that I didn't define these styles. In Chrome developer tools, it says user agent stylesheet in place of the CSS file name.
Now if I submit a form and some validation error occurs, I get the following stylesheet:
table {
white-space: normal;
line-height: normal;
font-weight: normal;
font-size: medium;
font-variant: normal;
font-style: normal;
color: -webkit-text;
text-align: -webkit-auto;
}
table {
display: table;
border-collapse: separate;
border-spacing: 2px;
border-color: gray;
}
The font-size from these new styles is disturbing my design. Is there a way to force my stylesheets and if possible, completely overwrite Chrome's default stylesheet?
What are the target browsers? Different browsers set different default CSS rules. Try including a CSS reset, such as the meyerweb CSS reset or normalize.css, to remove those defaults. Google "CSS reset vs normalize" to see the differences.
If <!DOCTYPE> is missing in your HTML content you may experience that the browser gives preference to the "user agent stylesheet" over your custom stylesheet. Adding the doctype fixes this.
Regarding the concept “user agent style sheet”, consult section Cascade in the CSS 2.1 spec.
User agent style sheets are overridden by anything that you set in your own style sheet. They are just the rock bottom: in the absence of any style sheets provided by the page or by the user, the browser still has to render the content somehow, and the user agent style sheet just describes this.
So if you think you have a problem with a user agent style sheet, then you really have a problem with your markup, or your style sheet, or both (about which you wrote nothing).
Marking the document as HTML5 by the proper doctype on the first line, solved my issue.
<!DOCTYPE html>
<html>...
A user agent style sheet is a ”default style sheet” provided by the browser (e.g., Chrome, Firefox, Edge, etc.) in order to present the page in a way that satisfies ”general presentation expectations.” For example, a default style sheet would provide base styles for things like font size, borders, and spacing between elements.
It is also common to use a CSS Reset to normalize or remove inconsistencies between browsers due to differences between which base styles are applied by each browser.
From the specification...
A user agent's default style sheet should present the elements of the document language in ways that satisfy general presentation expectations for the document language. ~ The Cascade.
For more information about user agents in general, see user agent.
Answering the question in title, what is the user agent stylesheet, the set of default styles in the browser: Here are some of them:
Chromium (Chrome): https://chromium.googlesource.com/chromium/src/third_party/+/master/blink/renderer/core/html/resources/html.css
WebKit (Safari): https://trac.webkit.org/browser/trunk/Source/WebCore/css/html.css
Gecko (Firefox): https://searchfox.org/mozilla-central/source/layout/style/res/html.css
Serenity: https://github.com/SerenityOS/serenity/blob/master/Userland/Libraries/LibWeb/CSS/Default.css#L4
Mozilla Servo: https://github.com/servo/servo/blob/master/resources/user-agent.css#L9
Personal opinion: Don't fight with them. They have good default values, for example, in rtl/bidi cases and are consistent nowadays. Reset what you see irrelevant to you, not all of them at once.
Define the values that you don't want to be used from Chrome's user agent style in your own CSS content.
Some browsers use their own way to read .css files.
So the right way to beat this:
If you type the command line directly in the .html source code, this beats the .css file, in that way, you told the browser directly what to do and the browser is at position not to read the commands from the .css file.
Remember that the commands writen in the .html file is stronger than the command in the .css.
I had the same problem as one of my <div>'s had the margin set by the browser. It was quite annoying but then I figured out as most of the people said, it's a markup error.
I went back and checked my <head> section and my CSS link was like below:
<link rel="stylesheet" href="ex.css">
I included type in it and made it like below:
<link rel="stylesheet" type="text/css" href="ex.css">
My problem was solved.
I just wanted to expand on the response from #BenM based on what I read here from Ire Aderinokun. Because the user-agent stylesheet provides helpful default styling, think twice before overriding it.
I had a dumb error where a button element didn't look right in Chrome. I had partially styled it because I didn't want it to look like a traditional button. However, I left out style elements like border, border-color, etc. So Chrome was stepping in to supply the parts that it thought I was missing.
The problem went away once I added styles like border: none, etc.
So if anyone else is having this problem, make sure you are explicitly overriding all the applicable default user-agent styles for an element if you notice it looks wonky, especially if you don't want to reset the user agent styles completely. It worked for me.
Each browser provides a default stylesheet, called the user agent stylesheet, in case an HTML file does not specify one. Styles that you specify override the defaults.
Because you have not specified values for the table element’s box, the default styles have been applied.
I ran into this same issue, it was because I was working with non-semantic html
<!--incorrect-->
<ul class="my-custom-font">
<button>
<a>user agent styles applied instead of my-custom-font</a>
<button>
</ul>
<!--correct-->
<ul class="my-custom-font">
<li>
<a>now inherits from from my-custom-font</a>
</li>
</ul>
Once the HTML was updated, styles were applied correctly
Every browser will have a rendering engine responsible for converting HTML document to web page.
The rendering engine will have a stylesheet of its own for all the HTML elements, a kind of default stylesheet for all the HTML elements and this stylesheet is called user agent stylesheet.
The rules of user agent stylesheet can be overwritten by author stylesheet.
The rendering engine for google chrome browser is called 𝐛𝐥𝐢𝐧𝐤. And if you look through its source code you will be able to find the default stylesheet.
check this https://www.linkedin.com/posts/smruti-sagar-pattanaik-a3a000195_html-css-chrome-activity-7027888128115847168-USil?utm_source=share&utm_medium=member_desktop
I have a solution. Check this:
Error
<link href="assets/css/bootstrap.min.css" rel="text/css" type="stylesheet">
Correct
<link href="assets/css/bootstrap.min.css" rel="stylesheet" type="text/css">
Put the following code in your CSS file:
table {
font-size: inherit;
}
i have a problem styling html <select> element.
After work around, i found the problem that firefox always overrride css with forms.css in every page load.
my question is how to override firefox default css in my page ?
forms.css, I am assuming this is your style sheet.
I am also guessing that this has some very specific styles that are more specific than select{}
Use firebug to determine what styles are being applied and where they are coming from, will at least show you if your style is being overridden.
Try defining a pseudo class for the element like
select.my_select1 { font-size: 8px; }
Then apply the pseudo class the element with
<select class="my_select1">
Looking at a web app that I'm building now that displays perfectly in all current major browsers, I have assigned pseudo classes to each of these form elements and have no problem.
I hope this helps you
I recently had a similar problem. I made a custom style select but the option:checked was getting a style from the Firefox forms.css that I could not override.
My co-workers found two solutions:
-webkit-text-fill-color: myColor; // on the select
select:focus:-moz-focusring {color: myColor;} // on the select
I understand that elements can have multiple classes:
.rfrsh-btn {
background-image:url(../../upload/rfrsh_nb_grey.png);
...
}
.submit
{
font-size: 0.85em;
padding: 0;
}
This was working perfectly as an ID before. now I changed it to a class and lo and behold, no images.
But for some reason this <button> element doesn't seem to want to display with a background image and styles applied.
Is there a reason for this? Or am I codeblind and doing something wrong.
I can't use ID either as it's repeated many times on the page.
Thanks all :)
There are several reasons. For instance, it's quite possible your image path is not correct. It 's worth noting that paths in CSS are relative to the .css file 's location, and not to the including page.
To better understand what's going on now and in the future, however, I recommend either working with Chrome, which offers a nice set of debugging tools, or use Firefox with Firebug installed. This way you can inspect your elements and see what styles get applied, overlapped, or any images the browser cannot locate.
For more information: http://www.thetruetribe.com/2008/03/firebug-tutorial-getting-started/
Underscores in class names can cause issues. Try renaming rfrsh_btn.
https://developer.mozilla.org/en/Underscores_in_class_and_ID_Names
I have the below code:
<button onmousemove="this.style.border='2px #555555 solid';"
onmouseout="this.style.border='';">Test</button>
On mousemove, it correctly changes the border as specified. On mouseout my intention is to change the border back to the original. This works in Gecko based browsers but not in IE. IE removes all the borders and the button becomes 2D.
How do I get back the original 3D look of the button?
Note: For debugging, I tried alert(this.style.border) the get the value of the original border. It shows it blank. So the original border value seems to be blank. But setting to blank does not bring the original look back. :(
Try setting and clearing a class for the element and assigning the border value to the class. Just like below:
.buttonHover
{
border: 2px #555555 solid
}
<button onmousemove="this.className='buttonHover';" onmouseout="this.className='';">Test</button>
Note that this simple JS code will break your existing classes assigned to the element if there are any. If you are to use additional classes, please add a comment declaring the situation and I'll change the code accordingly.
As far as I know, there is no way to restore the original OS look once the element's border is set, although it strikes me as odd that even emptying border doesn't do the job. Ah well. The OS style is not just a classic border, but includes a black outline (depending on OS visual settings, even more than that).
Seeing as IE < 8 doesn't understand outline, I think the best workaround would be putting an element around the button, and highlighting that on hover.
Would recommend using CSS for the same rather than javascript. You can do the following.
Define only the hover propery of the button.
HTML :
<button value="Hello">Hello</button>
CSS :
button:hover
{
border:1px solid #333;
}
I think that what you are looking for can be found in the bowers user agent CSS. Here is a table that will give you a good idea of whats going on with different browsers http://css-class.com/test/css/defaults/UA-style-sheet-defaults.htm .