feat: decrement number input value by defined steps

Author: Haberkamp

src/event/input.ts

@@ -232,7 +232,7 @@ function calculateNewValue(
 
     const reachedMin = value === node.min
     if (inputData === 'ArrowDown' && !reachedMin) {
-      newValue = (Number(value) - 1).toString()
+      newValue = (Number(value) - step).toString()
     }
   }
 

tests/event/behavior/keydown.ts

@@ -443,3 +443,15 @@ test("increments number input's value by the defined steps when pressing the arr
 
   expect(element).toHaveValue(20)
 })
+
+test("decrements number input's value by the defined steps when pressing the arrow down key", () => {
+  const {element} = render<HTMLInputElement>(
+    `<input value="10" type="number" step="10"/>`,
+  )
+
+  const instance = setupInstance()
+
+  instance.dispatchUIEvent(element, 'keydown', {key: 'ArrowDown'})
+
+  expect(element).toHaveValue(0)
+})