Paige's Journey🎈

Arguments

• an Array-like object accessible inside functions that contains the values of the arguments passed to that function.
• In order to change it to array
  • Array.from(arguments)
• has length property that can count from index #0 but does not have other methods like array
• 내장객체 함수에 전달 된 인수에 해당하는 배열 형태의 객체
• 함수를 선언한 순간, arguments 객체를 가지고 있음
• 함수가 호출되는 시점에, 그 때 전달 된 파라미터를 저장한 곳
• 파라미터 숫자를 정해놓더라도, 제한하지는 않기에, 적게 넣게 되면 undefined가 되고 갯수가 상관없음
• 내장 메서드를 포함하고 있지 않음

CSS Selector

• Grandchildren Selector(후손 셀렉터)

  • header h1 {}

• Child Selector(자식 셀렉터)

  • header > p { }

• Adjacent Sibiling Selector(인접 형제 셀렉터)

  • section + p { }

• Sibiling Selector(형제 셀렉터)

  • section ~ p { }

• ul > li:nth-child(2n) { }
  • Inside unordered list and list, choose child who is even
• section > p:nth-child(2n+1) { }
  • Among child elements of section, choose child element p who is odd
• section > p:nth-last-child(2n + 1) { }
  • Among child elements of section, choose child element p who is odd from the back
• p:first-of-type { }
  • Choose first p element among its sibiling elements of p
• div:last-of-type { }
  • choose last div element among its sibiling elements of div
•  p:nth-of-type(2) { }
  • choose second p element from sibiling elements of p
• p:nth-last-of-type(2) { }
  • choose second last p element from sibiling elemetns of p

• p:not(#only) {}
  • choose all except id is only from p elements