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HomeWeb Front-endCSS TutorialWhy Does My Container Show a Vertical Scrollbar Even When Its Height Matches Its Content?

Why Does My Container Show a Vertical Scrollbar Even When Its Height Matches Its Content?

Understanding the Vertical Scroll Bar Issue

When your .displayContainer div has the same height as its child elements, you might encounter an unnecessary vertical scroll bar. This occurs due to a subtle CSS default setting that plays a crucial role in typography: vertical-align: baseline.

Vertical-Align and Baseline

Inline-level elements, including inline-block divs, have a default vertical-align value of baseline. This setting reserves space beneath the element to accommodate potential descenders. Descenders are lowercase letters that extend below the baseline, such as "j," "g," or "p."

Baseline and descenders

Because of this reserved descender space, inline-block elements may appear elevated slightly from the bottom edge of their container, creating additional height inside the container. This extra height triggers an overflow and causes the vertical scroll bar to appear.

Removing the Vertical Scroll Bar

To remove the vertical scroll bar, you can modify the vertical-align setting of the child elements or the parent container. Here are a few options:

1. Adjust Vertical-Align

Change the vertical-align value of the child elements to bottom (or any other valid value):

.sideBar, .contentHolder {
  vertical-align: bottom;
}

2. Use Display: Block

Convert the child elements from display: inline-block to display: block:

.sideBar, .contentHolder {
  display: block;
}

3. Set Line-Height: 0

Set the line-height to 0 on the parent container:

.displayContainer {
  line-height: 0;
}

4. Set Font-Size: 0

Set the font-size to 0 on the parent container. You can override the font-size on the child elements if needed:

.displayContainer {
  font-size: 0;
}

.sideBar, .contentHolder {
  font-size: 16px;
}

By implementing any of these solutions, you can eliminate the vertical scroll bar while maintaining the desired layout.

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