improved plugin class by changing for only one method to do all

plugins/fipfcard_plugin/js/example_init.js

@@ -1,6 +1,8 @@
+console.log("PLGNTLS_data:");
+console.log(PLGNTLS_data);
 
 const title = document.querySelector(".first_el_to_change");
-title.innerHTML = "--- coucou ;) " + myvar_1;
+title.innerHTML = "--- coucou ;) " + PLGNTLS_data.myvar_1;
 
 const ajax_button_1 = document.querySelector("#test_ajax_1");
 ajax_button_1.addEventListener('click', () => {

plugins/fipfcard_plugin/js/example_script3.js

@@ -1,3 +1,3 @@
 
 const title3 = document.querySelector(".third_el_to_change");
-title3.innerHTML = "--- bye bye, " + myvar_2;
+title3.innerHTML = "--- bye bye, " + PLGNTLS_data.myvar_2;

plugins/fipfcard_plugin/js/menu/example_menu.js

@@ -5,5 +5,14 @@ sendButton.addEventListener('click', () => {
 	const inputValue = inputElement.value;
 	console.log("inputValue:");
 	console.log(inputValue);
-	ajax_post(inputValue, 'get_data');
+	PLGNTLS_ajax(inputValue, 'get_data')
+		.then((response) => response.json())
+		.then((data) => {
+			console.log("dataaa: ");
+			console.log(data);
+		})
+		.catch((error) => {
+			console.log("error: ");
+			console.log(error);
+		});
 });