我們可以使用 CSS 來對齊元素或其內容,CSS 提供了各種水平、垂直或居中對齊元素及其內容的選項。
內聯元素或內聯區塊元素,如文字、錨點、跨度等,可以藉助CSS text-align 屬性進行水平對齊。
區塊級元素如div、p等可以藉助CSS margin屬性進行水平對齊,但元素寬度不宜為100%相對於父級,這樣就不需要對齊。
元素可以在CSS 的幫助下水平對齊float 屬性,將多個元素左/右對齊且不在中心或使用CSS 定位方案絕對方法。
讓我們看一個CSS 水平對齊的範例−
Live Demo
<!DOCTYPE html> <html> <head> <title>CSS Horizontal Alignment</title> <style> .screen { padding: 10px; width: 70%; margin: 0 auto; background-color: #f06d06; text-align: center; color: white; border-radius: 0 0 50px 50px; border: 4px solid #000; } .seats span, .backSeats div{ margin: 10px; padding: 10px; color: white; border: 4px solid #000; } .seats span{ width: 120px; display: inline-block; background-color: #48C9B0; } .left{ text-align: left; } .right{ text-align: right; } .center{ text-align: center; } .seats{ text-align: center; } .backSeats div { background-color: #dc3545; } .leftFloat{ float: left; } .rightAbsolute{ position: absolute; right: 150px; } </style> </head> <body> <div class="screen">Screen</div> <div class="seats"> <span class="left">Adam</span> <span class="center">Martha</span> <span class="right">Samantha</span> <div class="backSeats"> <div class="leftFloat">Premium 1</div> <div class="leftFloat">Premium 2</div> <div class="rightAbsolute">Premium 3</div> </div> </div> </body> </html>
這將產生以下輸出−
#內聯元素或內聯塊元素,如文字、錨點等,可以透過CSS padding、CSS line-height或CSS Vertical-align屬性進行垂直對齊。
<!DOCTYPE html> <html> <head> <title>CSS Horizontal Alignment</title> <style> .screen { padding: 10px; width: 70%; margin: 0 auto; background-color: #f06d06; text-align: center; color: white; border-radius: 0 0 50px 50px; border: 4px solid #000; } .seats span:not(.withPadding){ margin: 10px; padding: 10px; color: white; border: 4px solid #000; } .seats span:not(.vertical){ height: 40px; display: inline-block; background-color: #48C9B0; } .withPadding{ padding: 20px 20px 0px; height: 20px; color: white; border: 4px solid #000; } .vertical{ display: inline-table; background-color: #48C9B0; height: 40px; } .verticalText { display: table-cell; vertical-align: middle; } .withLineHeight{ line-height: 40px; } .seats{ text-align: center; } .backLeftSeat{ background-color: #dc3545; max-height: 100px; height: 70px; margin: 20px; width: 300px; display: inline-block; position: relative; resize: vertical; overflow: auto; border: 4px solid #000; } .withPosition{ position: absolute; top: 50%; left: 2px; right: 2px; color: white; padding: 20px; transform: translateY(-50%); } .backRightSeats{ height: 122px; width: 800px; float: right; display: inline-flex; flex-direction: row; justify-content: center; align-items: center; } .withFlex { background-color: #dc3545; border: 4px solid #000; margin-right: 10px; color: white; padding: 20px; } </style></head> <body> <div class="screen">Screen</div> <div class="seats"> <span class="withPadding">Adam</span> <span class="withLineHeight">Martha</span> <span class="vertical"><p class="verticalText">Samantha</p></span> <div> <div class="backLeftSeat"> <div class="withPosition">Premium Readjustable Sofa</div> </div> <div class="backRightSeats"> <div class="withFlex">Premium Solo 1</div> <div class="withFlex">Premium Solo 2</div> <div class="withFlex">Premium Solo 3</div> </div> </div> </body> </html>輸出這將產生以下輸出− 當div未調整時 #當div被調整時
居中對齊
#我們可以使用上述水平和垂直對齊的方法來將元素置中對齊。以上是CSS 居中、水平和垂直對齊的詳細內容。更多資訊請關注PHP中文網其他相關文章!