Does CSS Respect Decimal Places in Width Specifications?

Decimal Precision in CSS Width

When working with CSS, it's common to specify element widths using numeric values. However, what happens if you include decimal places in those values?

Percentage Widths

In the case of percentage widths, decimal places are indeed respected. For example, consider the following code:

.percentage {
  width: 49.5%;
}

If the parent element is 100px wide, the element with this class will be 49.5 pixels wide. This demonstrates that decimal places in percentage widths are respected.

Pixel Widths

However, the situation is different for pixel widths. Decimal places are not respected in pixel widths. For instance, consider the following code:

.pixel {
  width: 122.5px;
}

Even though we specify 122.5px, the element's width will be rounded to 123px. This is because browsers don't support subpixel rendering of elements.

Subpixel Rendering

Subpixel rendering is a technique where pixels are divided into smaller subpixels to create the illusion of smoother edges. However, it's not commonly used in web browsers due to its performance implications. As a result, decimal places in pixel widths are not respected.

Conclusion

In summary, decimal places are respected in percentage widths but not pixel widths. When working with element dimensions, it's important to be aware of this distinction to ensure your layouts are as intended.

The above is the detailed content of Does CSS Respect Decimal Places in Width Specifications?. For more information, please follow other related articles on the PHP Chinese website!