first-childfirst-of-type

2015年12月30日—Here'sagreatexplanationonCSSTricks.Basically,thefirstchildofthe#blogdivisnotanarticleelement;it'saheaderelement.,The:first-of-typeselectormatcheseveryelementthatisthefirstchild,ofaparticulartype,ofitsparent.Tip:Thisisthesameas:nth-of-type(1).,2014年2月26日—:first-child匹配的是某父元素的第一个子元素，可以说是结构上的第一个子元素。,2022年6月16日—BothofthemareselectorsfortheHTMLuse...

參考資訊如下
CSS :first-child and :first-of

2015年12月30日 — Here's a great explanation on CSS Tricks. Basically, the first child of the #blog div is not an article element; it's a header element.

CSS :first-of

The :first-of-type selector matches every element that is the first child, of a particular type, of its parent. Tip: This is the same as :nth-of-type(1).

css选择器中:first-child与:first-of-type的区别

2014年2月26日 — :first-child 匹配的是某父元素的第一个子元素，可以说是结构上的第一个子元素。

Difference between :first-child and :first-of

2022年6月16日 — Both of them are selectors for the HTML used in the CSS to select specific children. The :first-child: The :first-child selector is used to ...

first-child - CSS: Cascading Style Sheets

2023年2月20日 — The :first-child CSS pseudo-class represents the first element among a group of sibling elements.

first-child

2015年3月27日 — The :first-child selector allows you to target the first element immediately inside another element. It is defined in the CSS Selectors ...

first-child and :first-of

2023年4月28日 — The :first-of-type is a pseudo-class CSS selector which selects or matches the first child element of a specific type within its parent element.

first-of-type - CSS: Cascading Style Sheets

2023年2月20日 — The :first-of-type CSS pseudo-class represents the first element of its type among a group of sibling elements.

jQuery :first-of

The :first-of-type selector selects all elements that are the first child, of a particular type, of their parent. Tip: This is the same as :nth-of-type(1). Tip: ...

What is the difference between :first-child and :first-of

2014年7月9日 — The :first-child pseudo-class selects an element that is the first element among a group of sibling elements if it is the first child of its ...