JSFiddle - React, Tailwind, and code Playground

HTML

Barcode: <input id="codebarre" type="text" name="fname" /><br />
Remark: <input class="remark" type="text" name="lname" /><br />

JavaScript

$("#codebarre").focus();

$(document).click(function(){
    if($(".remark:focus").length == 0) {
        $("#codebarre").focus() ;
    }        
})