Selectors in css

• Selectors, Grouped by Category • Full list of CSS selectors, includes Selectors Level 3 and Selectors Level 4. At writing, Level 4 is in draft status and many of the new selectors have limited support in browsers. This list is also available grouped Selector Description CSS / Selector Level * Selects all elements. 2 E Selects an element of type E 1 E:not( s1, s2) Selects an E element that does not match either s1 or s2. 3/4 E:matches( s1, s2) Selects an E element that matches s1 and/or s2. 4 E:has( rs1, rs2) Selects an E element, if either of the relative selectors rs1 or rs2, when evaluated with E as the :scope elements, match an element. 4 E.classname Selects an E element belonging to the class named classname. 1 E#myid Selects an E element with an ID of myid. 1 E[foo] Selects an E element with a foo attribute. 2 E[foo="bar"] Selects an E element whose foo attribute value is exactly equal to bar. 2 E[foo="bar" i] Selects an E element whose foo attribute value is exactly equal to bar, regardless of its case. Basically, using i allows you to specify "case-sensitive" when specifying the value. So for example, Text, text, and TEXT will all be selected if i is specified. 4 E[foo~="bar"] Selects an E element whose foo attribute value is a list of whitespace-separated values, one of which is exactly equal to bar. 2 E[foo^="bar"] Selects an E element whose foo attribute value begins exactly with the string bar. 3 E[foo$="bar"] Selects an E element whose foo attribute value end...

A CSS selector selects the HTML element(s) you want to style. CSS Selectors CSS selectors are used to "find" (or select) the HTML elements you want to style. We can divide CSS selectors into five categories: • Simple selectors (select elements based on name, id, class) • • • • This page will explain the most basic CSS selectors. The CSS element Selector The element selector selects HTML elements based on the element name. p The CSS id Selector The id selector uses the id attribute of an HTML element to select a specific element. The id of an element is unique within a page, so the id selector is used to select one unique element! To select an element with a specific id, write a hash (#) character, followed by the id of the element. Selector Example Example description id #firstname Selects the element with id="firstname" class .intro Selects all elements with class="intro" p.intro Selects only elements with class="intro" * Selects all elements p Selects all elements div, p Selects all elements and all elements

Yes, they are different... # is an single specific element with a unique id, but . is a multiple elements with a particular class. To put it another way: • #foo which would only apply to Specificity Another aspect where selectors differ is in their specificity - an id selector is deemed to be more specific than class selector. This means that where styles any rules for #sidebar with override conflicting rules for .box Learn more about CSS selectors See EDIT: Looks like Selectutorial might have gone to the big website in the sky, so try this The # means that it matches the id of an element. The . signifies the class name: This will be red.this will be blue. #myRedText Note that in a HTML document, the id attribute must be unique, so if you have more than one element needing a specific style, you should use a class name. The dot( .) signifies a class name while the hash ( #) signifies an element with a specific id attribute. The class will apply to any element decorated with that particular class, while the # style will only apply to the element with that particular id. Class name: .class It is also worth noting that in the id ( #) selector is more .) selector. Therefore, rules in the id statement will override rules in the class statement. For example, if both of the following statements: .headline are applied to the same HTML element: Today's Specials the color:blue rule would override the color:red rule. A couple of quick extensions on what has already been said.....

Exactly. In Sass you could have something like this... div Edit: from &hover: to &:hover I believe the ampersand is a Sometimes it’s useful to use a nested rule’s parent selector in other ways than the default. For instance, you might want to have special styles for when that selector is hovered over or for when the body element has a certain class. In these cases, you can explicitly specify where the parent selector should be inserted using the & character. One usage that is less widely known is you can add the ampersand to the end of a style so the parent selector becomes the child. eg: h3 font-size: 20px margin-bottom: 10px .some-parent-selector & font-size: 24px margin-bottom: 20px becomes, h3 you can read more about & use here

> is the 1 That means the selector div > p.some_class only matches paragraphs of .some_class that are nested directly inside a div, and not any paragraphs that are nested further within. This implies that every element matching div > p.some_class necessarily also matches div p.some_class, with the An illustration comparing the child combinator with the descendant combinator: div > p.some_class Some text here p.some_class, div p.some_class -->More text here Which elements are matched by which selectors? • Matched by both div > p.some_class and div p.some_class This p.some_class is located directly inside the div, hence a parent-child relationship is established between both elements. Since "child" is a type of "descendant", any child element is by definition also a descendant. Therefore, both rules are applied. • Matched by only div p.some_class This p.some_class is contained by a blockquote within the div, rather than the div itself. Although this p.some_class is a descendant of the div, it's not a child; it's a grandchild. Therefore, only the rule with the descendant combinator in its selector is applied. 1 Many people go further to call it "direct child" or "immediate child", but that's completely unnecessary (and incredibly annoying to me), because a child element is immediate by definition anyway, so they mean the exact same thing. There's no such thing as an "indirect child". > (greater-than sign) is a CSS Combinator. A combinator is something that explains the relat...

CSS selectors are one of the most important parts of CSS. They give you the ability to target HTML elements on your web page that you want to style. Without CSS selectors, you wouldn't be able to style your page to look how you want. Thankfully CSS selectors have been around for a while, and you can style elements on your page however you want. But if you really want to unlock the power of CSS and create amazing elements, then you need to understand what you can do with CSS selectors. Namely, you need to understand the basic CSS selectors before you work your way up to the advanced CSS selectors. This post will look into both. By the end, it will have you well on your way to unlocking the power of CSS selectors to create your own incredible elements. So let's get started by looking at what CSS selectors are. What are CSS Selectors? If you've written any CSS before, then you've likely seen a CSS selector. They are the first part of a CSS rule. You use CSS selectors to select the HTML elements you want to style. In CSS, selectors are defined by the CSS selector specification. This means that each selector must be CSS selectors tend to be split into five different categories. This post is going to look at them in two key categories of basic and advanced. Below are the five categories. • Simple selectors • Combinator selectors • Pseudo-class selectors • Pseudo-element selectors • Attribute selectors In order to get good at something you have to understand the basics so let's s...

1 * Let’s knock the obvious ones out, for the beginners, before we move on to the more advanced selectors. The star symbol will target every single element on the page. Many developers will use this trick to zero out the margins and padding. While this is certainly fine for quick tests, I’d advise you never to use this in production code. It adds too much weight on the browser, and is unnecessary. The * can also be used with child selectors. 1 #container Prefixing the hash symbol to a selector allows us to target by id. This is easily the most common usage; however, be cautious when using id selectors. Ask yourself: “do I absolutely need to apply an id to this element in order to target it?” id selectors are rigid and don’t allow for reuse. If possible, first try to use a tag name, one of the more semantic HTML elements, or even a pseudo-class. 3. .X 1 .error This is a class selector. The difference between ids and classes is that, with the latter, you can target multiple elements. Use classes when you want your styling to apply to a group of elements. Alternatively, use ids to find a needle in a haystack, and style only that specific element. 4. X 1 a . Live Demo of Basic Selectors Combinator Selectors 5. X Y 1 li a The next most common selector is the descendant selector. When you need to be more specific with your selectors, you use these. For example, what if, rather than targeting all anchor tags, you only need to target the anchors which are within an unordered l...

Selects all elements. Optionally, it may be restricted to a specific namespace or to all namespaces. Syntax: * ns|* *|* Example: * will match all the elements of the document. Selects all elements that have the given node name. Syntax: elementname Example: input will match any element. Selects all elements that have the given class attribute. Syntax: .classname Example: .index will match any element that has class="index". Selects an element based on the value of its id attribute. There should be only one element with a given ID in a document. Syntax: #idname Example: #toc will match the element that has id="toc". Selects all elements that have the given attribute. Syntax: [attr] [attr=value] [attr~=value] [attr|=value] [attr^=value] [attr$=value] [attr*=value] Example: [autoplay] will match all elements that have the autoplay attribute set (to any value). The " " (space) combinator selects nodes that are descendants of the first element. Syntax: A B Example: div span will match all elements that are inside a element. The > combinator selects nodes that are direct children of the first element. Syntax: A > B Example: ul > li will match all elements that are nested directly inside a element. The ~ combinator selects siblings. This means that the second element follows the first (though not necessarily immediately), and both share the same parent. Syntax: A ~ B Example: p ~ span will match all elements that follow a , immediately or not. The + combinator matches the se...

Hello, everyone! With the rapid enhancements in open web technologies across various browsers, the team at MDN, along with our partners at We are excited to share that there have been several noteworthy updates to MDN docs. This post touches upon some of those significant additions and updates to MDN. of syntax A new feature has been added to two CSS pseudo-classes to provide you with more options! It's the new of syntax, which can be used with the :nth-child() and :nth-last-child() pseudo-classes. Until now, while using these pseudo-classes, you could select sibling elements based on their position in the group, such as by specifying even, odd, or by specifying the notation An+B. The of syntax lets you further narrow down the selection of elements and then target elements based on their even, odd, or An+B position. Support for this syntax is currently available in /* using An+B notation in a 10-item list */ li:nth-child(-n + 3) :nth-child() and :nth-last-child() pseudo-classes and also added some cool examples to demo how to use of with :nth-child() and :nth-last-child(), :nth-child(), and value for CSS content property The experimental new CSS media feature prefers-reduced-transparency lets you detect if a user has enabled the setting on their device to minimize the amount of transparent or translucent layer effects. This feature is currently only available in Firefox. Thanks to Here's a quick look at what this feature looks like: @media (prefers-reduced-transparen...