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CSS 內邊距
Tryit：內邊距和元素寬度 - 結合 box-sizing
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<!DOCTYPE html> <html> <head> <style> div.ex1 { width: 300px; background-color: yellow; } div.ex2 { width: 300px; padding: 25px; box-sizing: border-box; background-color: lightblue; } </style> </head> <body> <h2>Padding and element width - with box-sizing</h2> <div class="ex1">This div is 300px wide.</div> <br> <div class="ex2">The width of this div remains at 300px, in spite of the 50px of total left and right padding, because of the box-sizing: border-box property. </div> </body> </html>
