What Does Your User Agent Say About You?


A user agent is a computer program representing a person, for example, a browser in a Web context.

Besides a browser, a user agent could be a bot scraping webpages, a download manager, or another app accessing the Web. Along with each request they make to the server, browsers include a self-identifying User-Agent HTTP header called a user agent (UA) string. This string often identifies the browser, its version number, and its host operating system.

Spam bots, download managers, and some browsers often send a fake UA string to announce themselves as a different client. This is known as user agent spoofing.

The user agent string can be accessed with JavaScript on the client side using the navigator.userAgent property.

A typical user agent string looks like this: "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:35.0) Gecko/20100101 Firefox/35.0".


User Agent String

Browser Data

Css User Agent Stylesheet Override

Christina Perez
• Tuesday, 05 July, 2022
• 9 min read

I'm working on a web app that has a poplar similar to Facebook's blue bar at the top. The UL has a 1em margin as defined by the useragentstylesheet of my browser.

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The issue is that the OP did not pick a rule that could possibly override the margin property that is set by the Sergeant (UA) directly on the UL tag. Inheritance is the means by which, in the absence of any specific declarations from any source applied by the CSS cascade, a property value of an element is obtained from its parent element.

This is a better attempt, a more specific selector #Vienna, which matches the Vienna element lower in the DOM, but the same principle applies, because the UL element is still below this element in the DOM. So, assuming that the UA rule used the selector UL and not !important, which is most likely the case, the solution would have been a simple UL {margin: 0;} , but it would be safer to make it more specific, say #Vienna UL {margin: 0} .

Sevenseacat sevenseacat23k55 gold badges5858 silver badges8383 bronze badges In Google Chrome, go to URL about:version and take note of the “profile path”.

Inside User StyleSheets”, there should be a file called Custom. In General section, check or uncheck “Show user agent styles”.

The major difference is that: CSS resets aim to remove all built-in browser styling. Elements like H1-6 will appear bold, larger etcetera consistently across browsers.

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Press Command + Shift + P (Mac) or Control + Shift + P (Windows, Linux, Chrome OS) to open the Command Menu. In the User agent section disable the Select automatically checkbox.

Create a CSS class that selects the input directly, for example. Explicitly setting inheritance behavior for the cursor style on all inputs.

Each browser provides a default stylesheet, called the useragentstylesheet, in case an HTML file does not specify one. Because you have not specified values for the table element’s box, the default styles have been applied.

In computing, an user agent is software (a software agent) that is acting on behalf of a user, such as a web browser that “retrieves, renders and facilitates end user interaction with Web content”. In case you didn’t know, every browser has its own default ‘ user agent stylesheet, that it uses to make styled websites appear more legible.

To clarify, my question is about why the useragentstylesheet is overriding the CSS and how to make that stop. If I'm not mistaken, the correct behavior of CSS is that the cursor style should be inherited by child nodes.

user chrome sheet agent override css

This allows the behavior I originally expected to happen in all cases where the user agent would otherwise cause the style not to inherit. Answering this question generally with elaborating the explanation I would say, the final value of CSS property is a four-step calculation (i.e.

In specification, Cascading takes precedence over Inheritance. In order to use inherited value you should override using code as suggested by lb T. i.e..

In above code since you only have user agent style sheet bounded with the element directly, hence takes precedence. In short inheritance < cascading < importance < useragentstylesheet is precedence order in your case.

Today I got the same issue, tested with no such pale-effect on Safari and Brave... Not sure why the so-long-waiting (3 years and counting) from Chrome to come up with a fix. I thought I had this problem and checked the usual suspects, Doc type, etc.

As ridiculous as this sounds, it turned out the style which I thought was being applied was commented out in the CSS. Making statements based on opinion; back them up with references or personal experience.

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Sometimes developers have to work with old codes, and it is when they run into some big problems, in particular, the inline style that cannot be overridden. The term “cascading” means hierarchical order in which different style sheet types interact when two styles come into conflict.

The conflict occurs when two different styles are applied to the same element. External Style Sheets (Linked or Imported).

So, it means that when a conflict arises between two styles, the last one used takes precedence. You must place inline styles in the of the HTML document, while embedded style sheets must be placed in the of the HTML document so that the inline styles will always be the last used ones and therefore they will take precedence.

You can find examples of different types of style sheets here. You can find detailed information about CSS id and class here.

It means that if you have an element with a class and ID selector with different styles, it is the ID style that takes precedence. If that class has a background-color of blue, and you want your

to have a red background instead, try to change the color from blue to red in the class itself.

option stylesheet css agent working

Try it Yourself An ! Important declaration is a great way to override the styles you want. Let’s see how you can use the !important declaration to override inline styles.

You can set individual styles in your global CSS file as !important overrides inline styles set directly on elements. Try it Yourself However, you should avoid using !important, because it makes debugging more difficult by breaking the natural cascading in your stylesheets.

As a nonsense special case for (2), duplicate simple selectors for increasing specificity when you have nothing more to specify. If you want to find more information about the ! Important declaration, simply click here.

Nathan Gross I have my UL element styled with margin: 0 and padding: 0 but I still see padding. The other weird thing, Chrome dev tools don’t even seem to highlight the padded area as it normally would when hovering over it.

Pauline_D UL and/or lit end to have ‘built-in’ padding and/or margins. Nathan Gross But I have both margin and padding set at 0.

override stylesheet

Paulie_D Have you set the UL/ LI to margin/ padding : 0 specifically rather than relying on a blanket * property… I find that it sometime doesn’t take with a * setting. I believe what is happening is that your mobile breakpoint {your grid stylesheet} is telling all “grid-” elements to become 100% width.

Since your IMG are within a grid-1 class it makes the div elements full width of the browser on smaller screens. The cascade is an algorithm that defines how to combine property values originating from different sources.

It lies at the core of CSS, as emphasized by the name: Cascading Style Sheets. Though style sheets come from these different origins, they overlap in scope; to make this work, the cascade algorithm defines how they interact.

To simplify the development process, Web developers often use a CSS reset style sheet, forcing common properties values to a known state before beginning to make alterations to suit their specific needs. The user (or reader) of the website can choose to override styles in many browsers using a custom userstylesheet designed to tailor the experience to the user's wishes.

The cascading algorithm determines how to find the value to apply for each property for each document element. That means rules whose selector matches the given element and which are part of an appropriate media at-rule.

css reset stylesheet agent user which rules greyed applied circled browser change way

When several key frames are appropriate, it chooses the latest defined in the most important document, but never combined all together. A very simple introduction to the CSS cascade CSS Key Concepts: CSS syntax, at-rule, comments, specificity and inheritance, the box, layout modes and visual formatting models, and margin collapsing, or the initial, computed, resolved, specified, used, and actual values.

Definitions of value syntax, shorthand properties and replaced elements. I'm developing a website and trying to debug in Chrome dev tool.

On Chrome dev tool it says Sergeant style instead of CSS file. 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 common to employ a reset style sheet to deal with inconsistencies among browsers. For this create CSS class and override the agent style sheet.

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