CSS Selectors Explained By Going Car Shopping
If you have ever seen a car dealership, then you can understand CSS selectors. When you step onto the lot of a car dealership, you’re instantly surrounded by different cars, colors, and years. And of course there’s that aggressive salesperson. But let’s leave them out this simulation.
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CSS selectors are the part of CSS rules that determine what HTML elements that are affected by the CSS rule. There are several different types of CSS selectors. Both CSS 1.0, CSS 2.1 and CSS 3.0 added selectors to the CSS standard. The rest of this text will go through these CSS selectors.
CSS selectors are not a new topic, nor the one to be posted now, but it's something I'm really interested in and have been working on this for a while. CSS selectors will not be new to most of us, the more basic selectors are type (div), ID (e.g. #container) & class (.sidebox)...
Selectors are one of, if not, the most important parts of CSS. They shape the cascade and determine how styles are to be applied to elements on a page.
Up until recently the focus of CSS never really touched on selectors. Occasionally there would be incremental updates within the selectors specification, but never any real ground breaking improvements. Fortunately, more attention has been given to selectors as of late, taking a look at how to select different types of elements and elements in different states of use.
In contrast to standard CSS selectors, pseudo selectors allow you to alter the appearance of a state or fragment of an element: Pseudo-class selectors describe the state of an element, such as :hover or :empty. On a style sheet, they are preceded by a single colon. As their name suggests pseudo-element selectors control the presentation of a portion of content, such as the first line or letter of a paragraph.
A CSS selector is the part of a CSS rule set that actually selects the content you want to style. Let’s look at all the different kinds of selectors available, with a brief description of each.
In this article we will explain how to use efficient CSS tag keys and selectors on your blog/website, avoiding all unnecessary things that can cause problems to your page.
So you learned the base id, class, and descendant selectors and then called it a day? If so, you're missing out on an enormous level of flexibility. While many of the selectors mentioned in this article are part of the CSS3 spec, and are, consequently, only available in modern browsers, you owe it to yourself to commit these to memory.
Preprocessor loops will not cause dramatic explosions in space (I hope), but they are useful for writing DRY CSS. While everyone is talking about pattern libraries and modular design, most of the focus has been on CSS selectors. No matter what acronym drives your selectors (BEM, OOCSS, SMACSS, ETC), loops can help keep your patterns more readable and maintainable, baking them directly into your code.
This is the 5th section of the CSS Getting Started tutorial; it explains how you can apply styles selectively, and how different kinds of selectors have different priorities. You add some attributes to the tags in your sample document, and you use these attributes in your sample stylesheet.
The CSS selectors :first-child and :last-child are used to apply styling to the first and last child elements of the parent. :first-child is part of the CSS 2.1 specification and :last-child CSS 3 so support is slightly limited for :first-child and more limited for :last-child. A number of browsers also have issues applying the styling correctly after additional elements have been added dynamically.