Swapping out an image using CSS

Previously, the most common method for "removing" text from elements was through text-indent: -9999px, however, it is now recommended to use

text-indent: 100%;
white-space: nowrap;
overflow: hidden;

This way, the browser does not need to create a huge 9999px box. But why not simply utilize font-size: 0? What are the downsides of employing this approach?

Answer №1

Each web browser interprets coding differently, and the range of outcomes is too vast to compile into a comprehensive list. Some common issues arise when browsers encounter a directive like font-size:0, resulting in text being displayed as if no font size had been specified. In other cases, the text may still appear visible but not very legible. However, certain browsers like Mozilla and Netscape7 may behave as intended and not show the text at all.

One would assume that setting font-size:0 leaves margins and paddings visible, although this could present challenges in both scenarios.

Personally, I prefer utilizing rgba with an opacity of 0.0 before resorting to font-size:0.

Answer №2

Ultimately, the choice is yours to make. Personally, I opt for using text-indent as a title feature so that while the CSS document is loading, the text acts as a placeholder until the CSS is fully loaded. In my experience, applying 'text-indent: -9999px' has not shown any noticeable impact on performance whatsoever.

In essence, there are no significant drawbacks in utilizing either 'font-size: 0' or 'text-indent: -9999px'; they both function equally effectively.

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