Check out example codes for "ionic install font". It will help you in understanding the concepts better.

Code Example 1

// in the fonts.scss file, add the font-face for each font file
@font-face {
   font-family: 'Source Code Pro';
   src: url('../assets/fonts/SourceCodePro-ExtraLight.ttf');
   font-weight: 200;
   font-style: normal;
}

// Import font.scss; add the following line to src > app > app.scss
@import '../theme/fonts';

Learn ReactJs, React Native from akashmittal.com