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  把玩 css 網頁視覺設計、矜持 w3c 網頁標準語法 (html)、體認無障礙網頁親和力 (accessibility)。默…漠… ～不惑仔 ... css 3D 動畫 (3D animation) ：立方體說明： css level 3 (css 3) animation 動畫特性，搭配 3D transform 造形，讓我們不需用到 3D 動畫軟體，不 ...
  
  2026-04-18
  
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  Selectors Level 3 - World Wide Web Consortium (W3C)
  
  6.2. Universal selector The universal selector, written as a CSS qualified name [CSS3NAMESPACE] with an asterisk (* U+002A) as the local name, represents the qualified name of any element type. It represents any single element in the document tree in ...
  
  2026-04-24
  
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CSS Selector Reference - W3Schools Online Web Tutorials

日期：2026-04-23

Free HTML CSS JavaScript DOM jQuery XML AJAX Angular ASP .NET PHP SQL tutorials, references, web building ......

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How nth-child Works | CSS-Tricks

日期：2026-04-22

There is a CSS selector, really a pseudo-selector, called nth-child. Here is an example of using it: ul li:nth-child(3n+3) { color: #ccc; } What the above...

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Selectors - World Wide Web Consortium (W3C)

日期：2026-04-18

5.8 Attribute selectors CSS 2.1 allows authors to specify rules that match elements which have certain attributes defined in the source document. 5.8.1 Matching attributes and attribute values Attribute selectors may match in four ways: [att] Match when t...

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Selectors Level 4

日期：2026-04-20

Pattern Represents Section Level * any element 5.2 Universal selector 2 E an element of type E 5.1 Type (tag name) selector 1 E:not(s1, s2) an E element that does not match either compound selector s1 or compound selector s2 4.3 The Negation Pseudo ......

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:first-child | CSS-Tricks

日期：2026-04-22

The :first-child selector allows you to target the first element immediately inside another element. It is defined in the CSS Selectors Level 3 spec as a ... Hi, Greats tutorial, thanks. I have a problem regarding to the above code, this CSS is not runnin...

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:first-child Selector | jQuery API Documentation

日期：2026-04-25

jQuery: The Write Less, Do More, JavaScript Library ... While :first matches only a single element, the :first-child selector can match more than one: one for each parent. This is equivalent to :nth-child(1)....

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CSS Pseudo-classes - W3Schools Online Web Tutorials

日期：2026-04-22

What are Pseudo-classes? A pseudo-class is used to define a special state of an element. For example, it can be used to: Style an element when a user mouses over it ... Match all elements in all first child elements In the following example, the selecto...

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CSS2 - :first-child and :last-child - QuirksMode - for all your browser quirks

日期：2026-04-19

How to select an element that is the first or last child of its parent. The :first-child pseudo class means "if this element is the first child of its parent". :last-child means "if this element is the last child of its parent". Note that only element nod...

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