font smoothing not working css code example

Example 1: antialiasing css

* {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
//Also use webfonts: https://www.fontsquirrel.com/

Example 2: what css font smoothing

The font-smooth CSS property controls the application of anti-aliasing when fonts are rendered. This feature is non-standard and is not on a standards track. It depends on the browser used and the system specifications; thus, it may not work for every user.