Bootstrap Grid基本範例。
Bootstrap Grid(網格)的是以CSS flexbox layout為基礎的實現,並具有以下特色:
- 支援breakpoints。並可依此控制grid container及column在各breakpoints的寬度及行為。
- Grid container自動置中並在column左右加入padding(又稱為gutter)控制column間的間隙。
- Grid使用row(列)包覆column(欄),1個row有12個column。
- 可使用Sass檔自訂grid的行為。
Grid與breakpoints的對應如下:
xs <576px |
sm ≥576px |
md ≥768px |
lg ≥992px |
xl ≥1200px |
xxl ≥1400px |
|
---|---|---|---|---|---|---|
Container max-width |
None (auto) | 540px | 720px | 960px | 1140px | 1320px |
Class prefix | .col- |
.col-sm- |
.col-md- |
.col-lg- |
.col-xl- |
.col-xxl- |
# of columns | 12 | |||||
Gutter width | 1.5rem (.75rem on left and right) |
基本範例
下面在demo.html
使用grid container。
demo.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-+0n0xVW2eSR5OomGNYDnhzAbDsOXxcvSN1TPprVMTNDbiYZCxYbOOl7+AMvyTG2x" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.1/dist/js/bootstrap.bundle.min.js" integrity="sha384-gtEjrD/SeCtmISkJkNUaaKMoLD0//ElJ19smozuHV6z3Iehds+3Ulb9Bn9Plx0x4" crossorigin="anonymous"></script>
<title>Demo</title>
</head>
<body>
<!-- grid container here -->
</body>
</html>
基本用法,最外層為container
為grid container,下一層是row
為row,然後是col
為column。
<div class="container"><!-- grid container -->
<div class="row"><!-- row -->
<div class="col border bg-dark text-light"><!-- column -->
Column
</div>
<div class="col border bg-dark text-light"><!-- column -->
Column
</div>
<div class="col border bg-dark text-light"><!-- column -->
Column
</div>
</div>
</div>
Grid預設每個column等寬。
<div class="container"><!-- grid container -->
<div class="row">
<div class="col border bg-dark text-light">
Column
</div>
<div class="col border bg-dark text-light">
Column
</div>
<div class="col border bg-dark text-light">
Column
</div>
</div>
<div class="row">
<div class="col border bg-dark text-light">
Column
</div>
<div class="col border bg-dark text-light">
Column
</div>
</div>
</div>
在col-
後接數字可設定column寬度佔12欄的比例。
<div class="container"><!-- grid container -->
<div class="row">
<div class="col-2 border bg-dark text-light">
Column
</div>
<div class="col-4 border bg-dark text-light">
Column
</div>
<div class="col border bg-dark text-light">
Column
</div>
</div>
<div class="row">
<div class="col-2 border bg-dark text-light">
Column
</div>
<div class="col-4 border bg-dark text-light">
Column
</div>
</div>
</div>
使用col-{breakpoint}-auto
依內容長度決定column寬度,且當視圖寬度小於breakpoint時會改以堆疊呈現。
<div class="container"><!-- grid container -->
<div class="row">
<div class="col-2 border bg-dark text-light">
R1C1
</div>
<div class="col-sm-auto border bg-dark text-light">
R1C2 - One Man’s Trash Is Another Man’s Treasure.
</div>
<div class="col border bg-dark text-light">
R1C3
</div>
</div>
<div class="row">
<div class="col-2 border bg-primary text-light">
R2C1
</div>
<div class="col-md-4 border bg-primary text-light">
R2C2 - The Early Bird Catches the Worm
</div>
</div>
</div>
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