How to Resize Font Size Dynamically Based on Div Size?

Resize Font-Size According to Div Size

In a scenario where a div is composed of nine boxes with text contained within the middle box, it is desirable to adjust the font size dynamically to maintain a consistent ratio with the overall page dimensions.

Resizing Text Within the Div

To achieve this, incorporate the following CSS3 properties within the tag:

body {
  font-size: calc(1.25vmin + 1.25vmax);
}

Cross-Resolution Compatibility

Instead of utilizing multiple CSS media queries to accommodate different resolutions, consider using the following CSS3 styles, which automatically adjust font size based on the screen width:

@media (min-width: 50px) { body { font-size: 0.1em; } }
@media (min-width: 100px) { body { font-size: 0.2em; } }
// ...and so on, with incrementing width thresholds...
@media (min-width: 1700px) { body { font-size: 3.6em; } }

Explanation

• The vmin unit represents the min percentage of either the viewport height or width.
• The vmax unit represents the max percentage of either the viewport height or width.
• By using this formula, the font size will scale proportionally to the smaller of the viewport height and width, ensuring consistent text proportions across different screen sizes.

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