How to add smooth scrolling to Bootstrap's scroll spy function

Question

I\'ve been trying to add a smooth scrolling function to my site for a while now but can\'t seem to get it to work.

Here is my HTML code relating to my navigation:<

Answer 1

// styles.css
html {
    scroll-behavior: smooth
}

Source: https://www.w3schools.com/howto/howto_css_smooth_scroll.asp#section2