diff --git a/FlexLove.lua b/FlexLove.lua
index 2de3ed1..5ae1bba 100644
--- a/FlexLove.lua
+++ b/FlexLove.lua
@@ -337,6 +337,7 @@ end
 -- Element Object
 -- ====================
 ---@class Element
+---@field id string?
 ---@field autosizing {width:boolean, height:boolean} -- Whether the element should automatically size to fit its children
 ---@field x number -- X coordinate of the element
 ---@field y number -- Y coordinate of the element
@@ -373,6 +374,7 @@ Element.__index = Element
 
 ---@class ElementProps
 ---@field parent Element? -- Parent element for hierarchical structure
+---@field id string?
 ---@field x number? -- X coordinate of the element (default: 0)
 ---@field y number? -- Y coordinate of the element (default: 0)
 ---@field z number? -- Z-index for layering (default: 0)
@@ -408,6 +410,7 @@ local ElementProps = {}
 function Element.new(props)
   local self = setmetatable({}, Element)
   self.children = {}
+  self.id = props.id or ""
   self.callback = props.callback
 
   ------ add non-hereditary ------
diff --git a/testing/__tests__/10_performance_tests.lua b/testing/__tests__/10_performance_tests.lua
index 800ed52..110d7fb 100644
--- a/testing/__tests__/10_performance_tests.lua
+++ b/testing/__tests__/10_performance_tests.lua
@@ -942,8 +942,8 @@ function TestPerformance:testComplexAnimationReadyLayoutPerformance()
       for i, element in ipairs(animation_elements) do
         if (frame + i) % 10 == 0 then
           -- Animate size changes
-          element.w = element.w + math.sin(frame * 0.1 + i) * 2
-          element.h = element.h + math.cos(frame * 0.1 + i) * 1
+          element.w = element.width + math.sin(frame * 0.1 + i) * 2
+          element.h = element.height + math.cos(frame * 0.1 + i) * 1
         end
 
         if (frame + i) % 15 == 0 then