Skip to content

Instantly share code, notes, and snippets.

@Ta2Rim Ta2Rim/studying.md
Last active Mar 5, 2019

Embed
What would you like to do?
Days 7~8 : Reading CSS Selectors
title date
Reading CSS Selectors
2019-03-04

Original post by tae: Reading CSS Selectors

Days 7~8 : Reading CSS Selectors

I already know almost CSS selector yet, but I decide to read again, and remind it. I like CSS selectors, especially pseudo-elements & pseudo-classes those enable isolated struction between styling and mark up. I love it. there's no need to make useless div intented to only style thanks for those.

What I newly learned after reading spec

  • Attribute selectors

    • [att|=val] Represents an element with the att attribute whose value is a white space-separated list of wrds, one of which is exactly 'val'
  • compare pseudo-elements with pseudo-classes

    • Pseudo-elemnts create abstractions about the document tree beyond those specified by the document language. CSS pseudo-element allow style some parts that document language doesn't offer to access. (e.g. :first letter, :first line, :before , :after)
    • Pseudo-classes classify elements on chracteristics other than their name, attributes or content.
    • Neither pseudo-element s nor pseudo-classes appear in the document source or document tree.
  • Pseudo-classes

    • UA are not required to reflow a currently displayed document due to pseudo-class transitions. It means UA may ignore the style rule when dynamic pseudo classes cause change position and canvas reflow.
    • a:hover must be placed after a:link and a:visited rules.
    • The language pseudo-class : :lang(ko)
  • Pseudo-elements

    • UA rewrite HTML paragraph due to pseudo-element, by including the fictional tag sequence.

    • :first-line pseudo-lement can only be attached to a "block container element",

    • while :first-line pseudo-element start tag is inserted right after the start tag of the block element, the :first-letter pseudo-element tags abut the content.( After the rule p:before {content:'note'}, the selector p:first-letter matches the 'n' of note.

    • The :before and :after pseudo-elements can be used to inset generated content before or after an element's content

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.