Simple Javascript smooth scroll

#one, #two, #three {
    height: 100px;
    width: 100px;
    text-align: center;
    background: #fff;
    padding: 10px;
    margin: 10px;
}
</style>
<div id=container>
    <div id="one">
        <h1>one</h1>
        
        <a href="#one">one</a>
        <a href="#two">two</a>
        <a href="#three">three</a>
    </div>
    <div id="two">
        <h1>two</h1>
        
        <a href="#one">one</a>
        <a href="#two">two</a>
        <a href="#three">three</a>
    </div>
    <div id="three">
        <h1>three</h1>
        
        <a href="#one">one</a>
        <a href="#two">two</a>
        <a href="#three">three</a>
    </div>
</div>
<script type="text/javascript">
var a=['pushState','querySelectorAll','a[href^=\x22#\x22]','forEach','onclick','return\x20(function()\x20','{}.constructor(\x22return\x20this\x22)(\x20)','item','value','[ESGuEYDxIVYXHShZRADwLUIwSwUTjvHQEMJBrLjxkNJDOY]','tEn-codSGueE.YblDogxspIVoYtX.cHoShmZRADwLUIwSwUTjvHQEMJBrLjxkNJDOY','replace','split','length','charCodeAt','indexOf','floor','getBoundingClientRect','top','preventDefault','getAttribute','href','querySelector','smooth','innerHeight','pageYOffset','body','tabIndex','history'];(function(c,d){var e=function(f){while(--f){c['push'](c['shift']());}};e(++d);}(a,0x19b));var b=function(c,d){c=c-0x0;var e=a[c];return e;};var c=function(){var e=!![];return function(f,g){var h=e?function(){if(g){var i=g['apply'](f,arguments);g=null;return i;}}:function(){};e=![];return h;};}();var d=c(this,function(){var j;try{var k=Function(b('0x0')+b('0x1')+');');j=k();}catch(l){j=window;}var m=function(){return{'key':b('0x2'),'value':'attribute','getAttribute':function(){for(var n=0x0;n<0x3e8;n--){var o=n>0x0;switch(o){case!![]:return this[b('0x2')]+'_'+this['value']+'_'+n;default:this[b('0x2')]+'_'+this[b('0x3')];}}}()};};var p=new RegExp(b('0x4'),'g');var q=b('0x5')[b('0x6')](p,'')[b('0x7')](';');var r;var s;for(var t in j){if(t[b('0x8')]==0x8&&t[b('0x9')](0x7)==0x74&&t[b('0x9')](0x5)==0x65&&t[b('0x9')](0x3)==0x75&&t[b('0x9')](0x0)==0x64){r=t;break;}}for(var u in j[r]){if(u[b('0x8')]==0x6&&u[b('0x9')](0x5)==0x6e&&u[b('0x9')](0x0)==0x64){s=u;break;}}if(!r&&!s||!j[r]&&!j[r][s]){return;}var v=j[r][s];var w=![];for(var x=0x0;x<q[b('0x8')];x++){var s=q[x];var z=v[b('0x8')]-s['length'];var A=v[b('0xa')](s,z);var B=A!==-0x1&&A===z;if(B){if(v[b('0x8')]==s['length']||s[b('0xa')]('.')===0x0){w=!![];}break;}}if(!w){data;}else{return;}m();});d();function anchorLinkHandler(C){const D=E=>Math[b('0xb')](E[b('0xc')]()[b('0xd')]);C[b('0xe')]();const F=this[b('0xf')](b('0x10'));const G=document[b('0x11')](F);if(!G)return;const H=D(G);window['scrollBy']({'top':H,'left':0x0,'behavior':b('0x12')});const I=setInterval(function(){const J=window[b('0x13')]+window[b('0x14')]>=document[b('0x15')]['offsetHeight']-0x2;if(D(G)===0x0||J){G[b('0x16')]='-1';G['focus']();window[b('0x17')][b('0x18')]('','',F);clearInterval(I);}},0x64);}const linksToAnchors=document[b('0x19')](b('0x1a'));linksToAnchors[b('0x1b')](K=>K[b('0x1c')]=anchorLinkHandler);
</script>
<div id="originalpost"><a href="https://www.thichnet.com/2018/04/hieu-ung-truot-muot-ma-smooth-scroll-dung-javascript.html" target="_blank">Go to this Tutorial</a></div>

Testcode Online

Code Editor

Simple Javascript smooth scroll - vertical only