Check out example codes for "line height negative css". It will help you in understanding the concepts better.

Code Example 1

/* setting a line-height of 1.3em to a paragraph element with a font size of 1em*/

/* with a percentage */
p { line-height: 130% }

/* with a length */
p { line-height: 1.3em}

/* with a number */
p { line-height: 1.3}

Learn ReactJs, React Native from akashmittal.com