Fix sporadic dates (#3664)

NEWS.md

@@ -12,6 +12,8 @@
 
 * Fixed a bug with `sliderInput()` when used as a range slider that made it impossible to change the slider value when both handles were at the maximum value. (#4131)
 
+* `dateInput` and `dateRangeInput` no longer send immediate updates to the server when the user is typing a date input. Instead, it waits until the user presses Enter or clicks out of the field to send the update, avoiding spurious and incorrect date values. Note that an update is still sent immediately when the field is cleared. (#3664)
+
 # shiny 1.9.1
 
 ## Bug fixes

inst/www/shared/shiny.js

@@ -8061,12 +8061,6 @@
     }, {
       key: "subscribe",
       value: function subscribe(el, callback) {
-        (0, import_jquery8.default)(el).on(
-          "keyup.dateInputBinding input.dateInputBinding",
-          function() {
-            callback(true);
-          }
-        );
         (0, import_jquery8.default)(el).on(
           "changeDate.dateInputBinding change.dateInputBinding",
           function() {
@@ -8510,12 +8504,6 @@
     }, {
       key: "subscribe",
       value: function subscribe(el, callback) {
-        (0, import_jquery9.default)(el).on(
-          "keyup.dateRangeInputBinding input.dateRangeInputBinding",
-          function() {
-            callback(true);
-          }
-        );
         (0, import_jquery9.default)(el).on(
           "changeDate.dateRangeInputBinding change.dateRangeInputBinding",
           function() {

srcts/src/bindings/input/date.ts

@@ -40,19 +40,15 @@ class DateInputBindingBase extends InputBinding {
     el;
   }
   subscribe(el: HTMLElement, callback: (x: boolean) => void): void {
-    $(el).on(
-      "keyup.dateInputBinding input.dateInputBinding",
-      // event: Event
-      function () {
-        // Use normal debouncing policy when typing
-        callback(true);
-      }
-    );
+    // Don't update when in the middle of typing; listening on keyup or input
+    // tends to send spurious values to the server, based on unpredictable
+    // browser-dependant interpretation of partially-typed date strings.
     $(el).on(
       "changeDate.dateInputBinding change.dateInputBinding",
       // event: Event
       function () {
         // Send immediately when clicked
+        // Or if typing, when enter pressed or focus lost
         callback(false);
       }
     );

srcts/src/bindings/input/daterange.ts

@@ -161,19 +161,15 @@ class DateRangeInputBinding extends DateInputBindingBase {
     this._setMax($endinput[0], $endinput.data("max-date"));
   }
   subscribe(el: HTMLElement, callback: (x: boolean) => void): void {
-    $(el).on(
-      "keyup.dateRangeInputBinding input.dateRangeInputBinding",
-      // event: Event
-      function () {
-        // Use normal debouncing policy when typing
-        callback(true);
-      }
-    );
+    // Don't update when in the middle of typing; listening on keyup or input
+    // tends to send spurious values to the server, based on unpredictable
+    // browser-dependant interpretation of partially-typed date strings.
     $(el).on(
       "changeDate.dateRangeInputBinding change.dateRangeInputBinding",
       // event: Event
       function () {
         // Send immediately when clicked
+        // Or if typing, when enter pressed or focus lost
         callback(false);
       }
     );