Have you ever visited a website on your mobile device and found it difficult to read the content because the text was too small or too large? Typography plays a crucial role in the readability and user experience of a website. In responsive web design, it is important to make typography responsive and easily readable on all devices.

One approach to making typography responsive is by using relative font sizes. Instead of setting a fixed font size in pixels, we can use em or rem units. These units are relative to the parent element's font size or the root element's font size, respectively. This allows the font size to adjust based on the screen size.

Here's an example of using em units to make a heading responsive:

1.responsive-heading {
2  font-size: 1.5em;
3}

With this approach, the heading will have a font size of 1.5 times the font size of its parent element.

Another technique is to use media queries to apply different styles based on the screen size. For example, we can specify different font sizes for different screen widths:

1.responsive-heading {
2  font-size: 24px;
3}
4
5@media (max-width: 768px) {
6  .responsive-heading {
7    font-size: 20px;
8  }
9}

xxxxxxxxxx

const fontSize = 16;

​

function calculateResponsiveFontSize() {

  const screenWidth = window.innerWidth;

  const breakpoint = 768;

​

  if (screenWidth < breakpoint) {

    return fontSize * 0.8;

  }

​

  return fontSize;

}

​

const heading = document.querySelector('.responsive-heading');

heading.style.fontSize = `${calculateResponsiveFontSize()}px`;