JSFiddle - React, Tailwind, and code Playground

HTML

<table><th><span class="change">Titel</span></th></table>

<table><th><input type="text" id="irgendwas"></th></table>

JavaScript

$(':input').on('focusout', function(event) {
var anzeigen = "<span class=\"change\">Titel</span>";
$(this).parent("th").html(anzeigen);
});

$('.change').on('click', function(event) { 
	var textfeld = "<input type=\"text\" id=\"irgendwas\">";
	$(this).parent("th").html(textfeld);
});