Remember the selected identity provider

static/select.js

@@ -44,6 +44,9 @@ $.widget("custom.combobox", {
                 var logoElement = $("#idp_logo");
                 logoElement.attr("src", ui.item.option.dataset.logoUrl);
                 logoElement.attr("alt", "Logo of " + ui.item.option.label);
+
+                // Save the selection for next time
+                localStorage.setItem("selectedIdp", ui.item.option.value);
             },
             autocompletechange: "_removeIfInvalid",
             keydown: function (event) {
@@ -155,6 +158,12 @@ if (selectionDiv.length) {
             name: "idp_entity_id",
         });
 
+    // check for the saved IdP selection
+    var selectedIdp = localStorage.getItem("selectedIdp");
+    if (selectedIdp == null) {
+        selectedIdp = dataElements.data("default");
+    }
+
     // translate the datalist values into dropdown options
     for (var idpEntry of dataElements.children()) {
         var option = $("<option>", {
@@ -163,7 +172,7 @@ if (selectionDiv.length) {
             "data-logo-url": idpEntry.dataset.logoUrl,
         });
         option.text(idpEntry.text);
-        if (option.val() == dataElements.data("default")) {
+        if (option.val() == selectedIdp) {
             option.attr("selected", true);
             logo.attr("src", option.data("logo-url"));
             logo.attr("alt", "Logo of " + option.attr("label"));