JSFiddle - React, Tailwind, and code Playground

by jordane reynet

HTML

<input type="text" name="toto" id="titi" >
<input type="button" onclick="VerifStr()">

JavaScript

function VerifStr() {
  var valeur = document.getElementById('titi').value;
  var exp=new RegExp("^[a-zA-Z]*$","g");
  if ( exp.test(valeur) ) {
    alert("OK"); 
  }else {
    alert("Erreur"); 
  }
}