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[study]이론정리/HTML & CSS & JavaScript

CSS 5일차 - Grid(1) 행 과 열

by yoon9i 2024. 5. 2.

22. Grid
1) 개요
일반적으로 웹페이지는 행과 열로 구성된 grid 형식을 따름.
flexbox 는 1차원인 행 또는 열만 제어가 가능하다.
grid 2차원 제어 방식으로 행과 열을 같이 제어할 수 있다.

2) 2가지 구성요소
- 반드시 부모( grid container ) / 자식 ( grid item ) 관계가 성립되어야한다. ( 자손은 적용안됨 )
- 중첩 가능

 

가. grid container
- display: grid;
- container 에서 사용가능한 속성들

나. grid item
- item 에서 사용가능한 속성들

ex)
.container {
   display: grid;
}

<div class="container"> // 부모
    <div>item</div> // 자식
    <div>item</div>
    <div>item
         <div>item2</div> // 자손 ( grid item 아님. ) 은 제외
    </div>
    <div class = "container2"> // 중첩가능 ( 자식이 또 다른 container 가 될수 있음 )
        <div>item</div>
    </div>
</div>

- grid 는 행으로 추가됨.
따라서 여러개의 행이 만들어지고 하나의 열로 구성됨.

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title>grid</title>
    <style type="text/css">
        .item-1 {
            background-color: antiquewhite;
        }

        .item-2 {
            background-color: red;
        }

        .item-3 {
            background-color: blue;
        }

        .item-4 {
            background-color: aqua;
        }

        .item-5 {
            background-color: yellow;
        }

        .item-6 {
            background-color: blueviolet;
        }

        .grid-container {
            margin: 20px;
            display: grid;
        }

        .grid-container div {
            height: 80px;
        }
    </style>
</head>

<body>
    <div class="grid-container">
        <div class="item-1">item1</div>
        <div class="item-2">item2</div>
        <div class="item-3">item3</div>
        <div class="item-4">item4</div>
        <div class="item-5">item5</div>
        <div class="item-6">item6</div>
    </div>
</body>

</html>

 

3) Container 에서 사용가능한 속성

a. item 배치
grid-auto-flow: row | column
- row 기본. ( 행으로 추가됨. 다중행의 1열로 구성 )
- column ( 열로 추가됨. 1행의 다중열로 구성 )

 

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title>grid-auto-flow</title>
    <style type="text/css">
        .item-1 {
            background-color: antiquewhite;
        }

        .item-2 {
            background-color: red;
        }

        .item-3 {
            background-color: blue;
        }

        .item-4 {
            background-color: aqua;
        }

        .item-5 {
            background-color: yellow;
        }

        .item-6 {
            background-color: blueviolet;
        }

        .grid-container {
            margin: 20px;
            display: grid;

            /* 기본: row */
            /* grid-auto-flow: row; */
            grid-auto-flow: column;
        }

        .grid-container div {
            height: 80px;
        }
    </style>
</head>

<body>
    <div class="grid-container">
        <div class="item-1">item1</div>
        <div class="item-2">item2</div>
        <div class="item-3">item3</div>
        <div class="item-4">item4</div>
        <div class="item-5">item5</div>
        <div class="item-6">item6</div>
    </div>
</body>

</html>



b. 열 갯수 지정
- 주의할 점은 n 개 지정하지 않고 열의 크기를 지정한다.
grid-template-columns: 값  값  값;

값의 단위: px , %( 기준: container ), rem(기준: 웹브라우저 기본글꼴값-16px ) , auto, fr(fraction)

ex) 100px 일때
grid-template-columns: 10px 10px 2fr 1fr
80px 을
2fr -> 2/3
1fr -> 1/3
로 나누어서 저장

ex) grid-template-columns: 20px 20px 20px 20px;
     grid-template-columns: 20% 20% 20% 20%;
     grid-template-columns: 20% 20px 20px 20%;
     grid-template-columns: 20px 20px 20px auto;
     grid-template-columns: 20px 20px 20px 1fr;
     grid-template-columns: 20px 2fr 20px 1fr;
     grid-template-columns: repeat(4, 20px);
     grid-template-columns: repeat(4, 20%);
     grid-template-columns: 20px minmax(10px, 100px) 20px auto;

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title>grid-template-columns 열갯수</title>
    <style type="text/css">
        .item-1 {
            background-color: antiquewhite;
        }

        .item-2 {
            background-color: red;
        }

        .item-3 {
            background-color: blue;
        }

        .item-4 {
            background-color: aqua;
        }

        .item-5 {
            background-color: blueviolet;
        }

        .grid-container {
            margin: 20px;
            display: grid;

            /* 기본: row */
            grid-auto-flow: row;
            /* grid-auto-flow: column; */

            /* grid-template-columns: 150px 150px 150px 150px; */
            grid-template-columns: repeat(4, 150px);
        }

        .grid-container div {
            height: 80px;
        }

        .grid-container2 {
            margin: 20px;
            display: grid;

            /* 기본: row */
            grid-auto-flow: row;
            /* grid-auto-flow: column; */

            /* grid-template-columns: 25% 25% 25% 25%; */
            grid-template-columns: repeat(4, 25%);
        }

        .grid-container3 {
            margin: 20px;
            display: grid;

            /* 기본: row */
            grid-auto-flow: row;
            /* grid-auto-flow: column; */

            /* grid-template-columns: 150px 150px 150px auto; */
            /* 50%-전체너비의 반 / 150px / 2rem: 32px / 나머지 */
            grid-template-columns: 50% 150px 2rem auto;
        }

        .grid-container4 {
            margin: 20px;
            display: grid;

            grid-auto-flow: row;
            grid-template-columns: 50% 150px 2fr 1fr;
        }

        .grid-container5 {
            margin: 20px;
            display: grid;

            grid-auto-flow: row;
            grid-template-columns: 50% 150px 2rem;
            /* 
            지정되지 않은 4열과 5열은 다음 행으로 넘어가서 
            기존열의 크기를 갖는다.
            */
        }
    </style>
</head>

<body>
    <div class="grid-container">
        <div class="item-1">item1</div>
        <div class="item-2">item2</div>
        <div class="item-3">item3</div>
        <div class="item-4">item4</div>
    </div>
    <hr>
    <div class="grid-container2">
        <div class="item-1">item1</div>
        <div class="item-2">item2</div>
        <div class="item-3">item3</div>
        <div class="item-4">item4</div>
    </div>
    <hr>
    <div class="grid-container3">
        <div class="item-1">item1</div>
        <div class="item-2">item2</div>
        <div class="item-3">item3</div>
        <div class="item-4">item4</div>
    </div>
    <hr>
    <div class="grid-container4">
        <div class="item-1">item1</div>
        <div class="item-2">item2</div>
        <div class="item-3">item3</div>
        <div class="item-4">item4</div>
    </div>
    <hr>
    <div class="grid-container5">
        <div class="item-1">item1</div>
        <div class="item-2">item2</div>
        <div class="item-3">item3</div>
        <div class="item-4">item4</div>
        <div class="item-5">item-5</div>
    </div>
</body>

</html>

 

c. 행 갯수 지정
- 주의할 점은 n개 지정하지 않고 행의 크기를 지정한다.

grid-template-rows: 값 값 값 값; ( 사용방식은 grid-template-columns 똑같다. )

값의 단위: px , %( 기준: container ), rem(기준: 웹브라우저 기본글꼴값-16px ) , auto, fr(fraction)

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title>grid-template-rows 행갯수생성</title>
    <style type="text/css">
        .item-1 {
            background-color: antiquewhite;
        }

        .item-2 {
            background-color: red;
        }

        .item-3 {
            background-color: blue;
        }

        .item-4 {
            background-color: aqua;
        }



        .grid-container {
            margin: 20px;
            display: grid;

            grid-auto-flow: row;
            /* grid-template-rows: 50px 50px 50px 50px; */
            grid-template-rows: repeat(4, 50px);
        }

        .grid-container2 {
            margin: 20px;
            display: grid;

            grid-auto-flow: row;

            height: 400px;
            /* 높이 400px 에 대한 25% 크기 */
            grid-template-rows: 25% 25% 25% 25%;
        }

        .grid-container3 {
            margin: 20px;
            display: grid;

            grid-auto-flow: row;

            height: 400px;
            /* auto = 400 - (78-32-150) */
            grid-template-rows: 78px 2rem 150px auto;
        }

        .grid-container4 {
            margin: 20px;
            display: grid;

            grid-auto-flow: row;

            height: 400px;
            grid-template-rows: 78px 2rem 2fr 1fr;
        }
    </style>
</head>

<body>
    <div class="grid-container">
        <div class="item-1">item1</div>
        <div class="item-2">item2</div>
        <div class="item-3">item3</div>
        <div class="item-4">item4</div>
    </div>
    <hr>
    <div class="grid-container2">
        <div class="item-1">item1</div>
        <div class="item-2">item2</div>
        <div class="item-3">item3</div>
        <div class="item-4">item4</div>
    </div>
    <hr>
    <div class="grid-container3">
        <div class="item-1">item1</div>
        <div class="item-2">item2</div>
        <div class="item-3">item3</div>
        <div class="item-4">item4</div>
    </div>
    <hr>
    <div class="grid-container4">
        <div class="item-1">item1</div>
        <div class="item-2">item2</div>
        <div class="item-3">item3</div>
        <div class="item-4">item4</div>
    </div>
</body>

</html>

 

 

행과 열 같이 생성

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title>grid-행과열같이생성</title>
    <style type="text/css">
        .item-1 {
            background-color: antiquewhite;
        }

        .item-2 {
            background-color: red;
        }

        .item-3 {
            background-color: blue;
        }

        .item-4 {
            background-color: aqua;
        }

        .item-5 {
            background-color: skyblue;
        }

        .item-6 {
            background-color: purple;
        }


        .grid-container {
            height: 500px;
            margin: 20px;
            display: grid;

            grid-auto-flow: row;

            grid-template-columns: 50% 50%;
            grid-template-rows: 78px 2rem 1fr;
        }

        .grid-container2 {
            height: 500px;
            margin: 20px;
            display: grid;

            grid-auto-flow: row;

            grid-template-columns: 50% 50%;
            /* 
            minmax() 의 경우 height 값에 따라서 2행의 크기가 동적으로 변경된다. 
            최대한 height 에 맞춰줌.
            */
            grid-template-rows: 78px minmax(10px, 400px) 50px;
        }
    </style>
</head>

<body>
    <div class="grid-container">
        <div class="item-1">item1</div>
        <div class="item-2">item2</div>
        <div class="item-3">item3</div>
        <div class="item-4">item4</div>
        <div class="item-5">item5</div>
        <div class="item-6">item6</div>
    </div>
    <hr>
    <div class="grid-container2">
        <div class="item-1">item1</div>
        <div class="item-2">item2</div>
        <div class="item-3">item3</div>
        <div class="item-4">item4</div>
        <div class="item-5">item5</div>
        <div class="item-6">item6</div>
    </div>

</body>

</html>

 

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