[bug] Compare x against x not y in isDifferentPointerPosition()

src/system/pointer/shared.ts

@@ -27,7 +27,7 @@ export function isDifferentPointerPosition(
 ) {
   return (
     positionA.target !== positionB.target ||
-    positionA.coords?.x !== positionB.coords?.y ||
+    positionA.coords?.x !== positionB.coords?.x ||
     positionA.coords?.y !== positionB.coords?.y ||
     positionA.caret?.node !== positionB.caret?.node ||
     positionA.caret?.offset !== positionB.caret?.offset

tests/pointer/drag.ts

@@ -20,6 +20,27 @@ test('drag sequence', async () => {
   `)
 })
 
+test('drag sequence w/ differing x coordinates', async () => {
+  const {element, getClickEventsSnapshot, user} = setup(`<div></div>`)
+
+  await user.pointer([
+    {keys: '[MouseLeft>]', target: element, coords: {x: 0, y: 0}},
+    {target: element, coords: {x: 0, y: 0}}, // doesn't actually move, won't show up in snapshot below
+    {target: element, coords: {x: 10, y: 0}}, // will show up in snapshot below
+    '[/MouseLeft]',
+  ])
+
+  expect(getClickEventsSnapshot()).toMatchInlineSnapshot(`
+    pointerdown - pointerId=1; pointerType=mouse; isPrimary=true
+    mousedown - button=0; buttons=1; detail=1
+    pointermove - pointerId=1; pointerType=mouse; isPrimary=true
+    mousemove - button=0; buttons=1; detail=0
+    pointerup - pointerId=1; pointerType=mouse; isPrimary=true
+    mouseup - button=0; buttons=0; detail=1
+    click - button=0; buttons=0; detail=1
+  `)
+})
+
 test('drag touch', async () => {
   const {element, getClickEventsSnapshot, user} = setup(`<div></div>`)