JSFiddle - React, Tailwind, and code Playground
HTML
<button onclick="change();">Change</button>
<input value="Étape 1/2" name="submitForm" type="submit" class="submit">
<script>
function change() {
$(".submit").attr("value", "Étape suivante");
$(".submit").addClass("btn btn-large btn-primary formdevis");
$(".submit").removeClass("submit");
}
</script>