How does CSS detect conflict?

CSS doesn’t have conflicts, it has cascades. The idea is that you CAN define multiple rules that apply to the same elements and the order in which you place the styles reflects an importance – i.e. if it appears last, it will override previous rules where there is something you describe as a conflict.

What is CSS conflicting style?

If there are two or more conflicting CSS rules that point to the same element, the browser follows some rules to determine which one is most specific and therefore wins out. Think of specificity as a score/rank that determines which style declarations are ultimately applied to an element.

How do you avoid class conflict in CSS?

Only use BEM class selectors in your stylesheets.

Do not use element selectors, id selectors, or inline styles for the purpose of styling. Give meaningful names to the block, element and modifier sections. For example, .

What are the 3 parts of a CSS rule?

The CSS syntax consists of a set of rules. These rules have 3 parts: a selector, a property, and a value.

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What are the three cascade principles used by browser when style rules conflict?

When declarations conflict, the cascade considers three things to resolve the difference: Stylesheet origin—Where the styles come from. Your styles are applied in conjunction with the browser’s default styles. Selector specificity—Which selectors take precedence over which.

Does CSS order matter?

CSS Order Matters

In CSS, the order in which we specify our rules matters. If a rule from the same style sheet, with the same level of specificity exists, the rule that is declared last in the CSS document will be the one that is applied.

Does CSS property order matter?

The order of the properties does not matter (in a technical sense) unless they: background-color: red; background: url(‘foo’); … will give different results (since if you omit the background-color portion of the background property it is treated as transparent ).

How do you namespace in CSS?

There are no namespaces in CSS. All you do in CSS ends up in global scope. This is by design.

How do I override Bootstrap CSS?

Can you override Bootstrap CSS? If you want to customize your Bootstrap site, you can leave the source code as is and simply add custom code in an external stylesheet. The code in this external stylesheet will override the existing styles — as long as it’s set up properly.

Can I use two versions of bootstrap?

Each framework could behave differently when multiple versions are loaded which is why developers probably try to avoid it if possible. If you need to override a bootstrap style than it should be placed last.

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What comes first in a CSS rule?

The first CSS rule targets the body element. The styles set for the body element in this CSS rule are inherited by the div elements. … This CSS rule is more specific to div elements that the styles inherited from the body element. The third CSS rule targets all HTML elements with an attribute named myattr .

What is a valid CSS rule?

The :valid CSS pseudo-class represents any <input> or other <form> element whose contents validate successfully. This allows to easily make valid fields adopt an appearance that helps the user confirm that their data is formatted properly.

What is CSS rules?

A CSS rule is a grouping of one or more CSS properties which are to be applied to one or more target HTML elements. A CSS rule consists of a CSS selector and a set of CSS properties. The CSS selector determines what HTML elements to target with the CSS rule. … In the example above it is the div part of the CSS rule.

What theory decides what formatting wins when two CSS rules collide?

What theory decides what formatting wins when two CSS rules collide? Specificity is the theory that decides which rule wins during a conflict.

What does Cascade mean in CSS?

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. This article explains what the cascade is, the order in which CSS declarations cascade, and how this affects you, the web developer.


What is the key difference between HTML and CSS?

Quite simply, HTML (Hypertext Markup Language) is used to create the actual content of the page, such as written text, and CSS (Cascade Styling Sheets) is responsible for the design or style of the website, including the layout, visual effects and background color.

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