要解決網頁中內容溢出的問題，可使用CSS屬性來控制。 1. 使用overflow屬性控制溢出內容的顯示方式，如overflow: hidden隱藏溢出內容，overflow: auto在需要時添加滾動條；2. 設置max-width和max-height防止圖像或媒體元素過大導致佈局錯位，結合object-fit保持視覺一致性；3. 使用min-width和min-height避免容器過小影響可讀性和交互性；4. 應用text-overflow: ellipsis在文本過長時顯示省略號以保持界面整潔。這些方法能有效提升網頁佈局的穩(wěn)定性和用戶體驗。

有時候， you're styling a webpage, and suddenly something doesn't look right. Text spills out of its container, an image stretches weirdly, or a layout breaks entirely. One common culprit? Content overflow —especially when it's unexpected.

The good news is that CSS gives us tools to handle this. You don't always need JavaScript or complex workarounds. Let's go over a few practical ways to manage unexpected content overflow using basic CSS properties.

Use overflow to Control Clipping and Scrollbars

This is the most straightforward way to deal with overflow. The overflow property lets you define what happens when content exceeds the size of its container.

• overflow: visible (default): Content flows outside the box.
• overflow: hidden : Clips the content, hiding anything that goes beyond the container.
• overflow: scroll : Always shows scrollbars, whether needed or not.
• overflow: auto : Adds scrollbars only when necessary.

For example, if you have a card layout and want to make sure long text doesn't break the design:

 .card {
  max-height: 200px;
  overflow: auto;
}

This way, if the text inside the .card gets too long, it won't push everything else down—it'll just get a scrollbar.

Set max-width and max-height to Prevent Stretching

Sometimes the problem isn't the text but an image or embedded media that's too big. Without limits, those elements can stretch containers and mess up your layout.

Adding max-width and max-height ensures that content respects boundaries:

 img {
  max-width: 100%;
  height: auto;
}

This keeps images from spilling out of their parent containers while maintaining aspect ratio. For more rigid layouts, you might also set a max-height depending on your design needs.

Also consider combining these with object-fit for images:

 img {
  max-width: 100%;
  max-height: 300px;
  object-fit: cover;
}

That helps maintain visual consistency even when image sizes vary.

Avoid Layout Breakage with min-width and min-height

While we often focus on preventing overflow, sometimes the issue is underflow—content gets squashed so much it becomes unreadable or unusable.

Setting min-width or min-height on key containers helps prevent things from collapsing too far:

 .modal-content {
  min-width: 300px;
}

This is especially useful in responsive designs where shrinking too much on small screens can ruin readability or interaction.

You can also use min-width on table cells or grid items to avoid cramped layouts:

 td {
  min-width: 120px;
}

It's a subtle fix, but it makes a noticeable difference in usability.

Bonus Tip: Use text-overflow: ellipsis for Truncated Text

If you're dealing with short UI elements like buttons or table cells and want to keep text from wrapping or overflowing, text-overflow: ellipsis comes in handy.

Here's how to apply it:

 .truncate {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

This setup hides any text that doesn't fit and ends it with an ellipsis ( … ). It works best when you know the space is limited and you want to preserve readability without breaking layout.

Dealing with unexpected content overflow is part of the job when building real-world websites. These CSS properties aren't flashy, but they're reliable and easy to implement. Once you get into the habit of applying them proactively, layout surprises become a lot less frequent.

基本上就這些。

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