JSFiddle - React, Tailwind, and code Playground

HTML

<body>
<input type="button" id="btr" class="tieicon-left-open">moins</input>
<input type="button" id="btr" class="tieicon-right-open">plus</input>
<br>
<div id='ctn' class="feedzy-horizontal" style='overflow-y: hidden; overflow-x: scroll;width:500px;height:100px;'>
	<div style='width:2000px;height:80px;background:red'></div>
</body>

JavaScript

var scr_btn={

ctn:"",

init:function(){

document.getElementsByClassName("tieicon-right-open")[0].onclick=scr_btn.plus;

document.getElementsByClassName("tieicon-left-open")[0].onclick=scr_btn.moins;

scr_btn.ctn=document.getElementsByClassName("feedzy-horizontal")[0];

},

plus:function (){

scr_btn.ctn.scrollLeft=scr_btn.ctn.scrollLeft+100;

},

moins:function(){

scr_btn.ctn.scrollLeft=scr_btn.ctn.scrollLeft-100;

}
}
scr_btn.init()