scrollToSmooth.js锚点滚动插件右侧圆点

<script src="./dist/scrolltosmooth.js"></script>

<nav>
  <a href="#section-1">Section 1</a>
  <a href="#section-2">Section 2</a>
  <a href="#section-3">Section 3</a>
  <a href="#section-4">Section 4</a>
  <a href="#section-5">Section 5</a>
</nav>

var smoothScroll = new scrollToSmooth('a')
smoothScroll.init();

var smoothScroll = new scrollToSmooth('a',{
    duration: 500
})

var smoothScroll = new scrollToSmooth('a',{
    easing: "linear" //linear easeInQuad easeOutQuad easeInOutQuad easeInCubic easeOutCubic easeInOutCubic easeInQuart easeOutQuart easeInOutQuart easeInQuint easeOutQuint easeInOutQuint easeInSine easeOutSine easeInOutSine easeInExpo easeOutExpo easeInOutExpo easeInCirc easeOutCirc easeInOutCirc easeInElastic easeOutElastic easeInOutElastic easeInBack easeOutBack easeInOutBack easeInBounce easeOutBounce easeInOutBounce
})

var smoothScroll = new scrollToSmooth('a',{
    callback: function () { 
      console.log('we reached it!'); 
    }
})