Fixed throttling on keypress (#3054)

* Fixed throttling on keypress

* formatting added

packages/alpinejs/src/utils/on.js

@@ -110,6 +110,11 @@ function isListeningForASpecificKeyThatHasntBeenPressed(e, modifiers) {
         keyModifiers.splice(debounceIndex, isNumeric((keyModifiers[debounceIndex+1] || 'invalid-wait').split('ms')[0]) ? 2 : 1)
     }
 
+    if (keyModifiers.includes('throttle')) {
+        let debounceIndex = keyModifiers.indexOf('throttle')
+        keyModifiers.splice(debounceIndex, isNumeric((keyModifiers[debounceIndex+1] || 'invalid-wait').split('ms')[0]) ? 2 : 1)
+    }
+
     // If no modifier is specified, we'll call it a press.
     if (keyModifiers.length === 0) return false
 

tests/cypress/integration/directives/x-on.spec.js

@@ -275,6 +275,22 @@ test('.debounce modifier',
     }
 )
 
+test('.throttle modifier',
+    html`
+        <div x-data="{ count: 0 }">
+            <input x-on:keyup.throttle.504ms="count = count+1">
+            <span x-text="count"></span>
+        </div>
+    `,
+    ({ get }) => {
+        get('span').should(haveText('0'))
+        get('input').type('f')
+        get('span').should(haveText('1'))
+        get('input').type('ffffffffffff')
+        get('span').should(haveText('1'))
+    }
+)
+
 test('keydown modifiers',
     html`
         <div x-data="{ count: 0 }">