Fix #21407 (#22759)

- Fix #21407

---------

Co-authored-by: Amjad Ben Hedhili <amjadhedhili@outlook.com>

changelog.md

@@ -13,6 +13,7 @@
 
 - Added `newStringUninit` to system, which creates a new string of length `len` like `newString` but with uninitialized content.
 - Added `hasDefaultValue` to `std/typetraits` to check if a type has a valid default value.
+- Added Viewport API for the JavaScript targets in the `dom` module.
 
 [//]: # "Deprecations:"
 

lib/js/dom.nim

@@ -1832,3 +1832,11 @@ since (1, 7):
 
   proc matches*(self: Node; cssSelector: cstring): bool {.importjs: "(#.$1(#) || false)".}
     ## https://developer.mozilla.org/en-US/docs/Web/API/Element/matches
+
+
+since (2, 1):
+  type VisualViewport* {.importc.} = ref object of EventTarget
+    offsetLeft*, offsetTop*, pageLeft*, pageTop*, width*, height*, scale*: float
+    onResize*, onScroll*: proc (event: Event) {.closure.}
+
+  func visualViewport*(self: Window): VisualViewport {.importjs: "#.$1", nodecl.}