Edit fiddle - JSFiddle - React, Tailwind, and code Playground

JSFiddle - React, Tailwind, and code Playground

HTML

<body>
<form id="frm_nm_chx_exp" name="id_chx_exp"  
		action="test_bt2.html" method="post" target="_blank" >
  <input type="checkbox" id="id_ass_oui"/>
  <input type="hidden" id="autre"/>
  <input type="submit" name="foo" value="valider"/> 
  </form>
</body>

JavaScript

addEventListener("load",function(){
	document.querySelector("#frm_nm_chx_exp").onsubmit=function(e){
 		!document.getElementById('id_ass_oui').checked ? !confirm("Validez vous malgré l'absence d'assurance assurance ?") ? e.preventDefault(): false : false;

}},false)

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JSFiddle - React, Tailwind, and code Playground

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