Layer tree when the fixed elements are out-of-view (should have just a root layer):
{
"layers": [
{
"name": "Scrolling background of LayoutView #document",
"bounds": [785, 4016],
"contentsOpaque": true,
"backgroundColor": "#FFFFFF"
},
{
"name": "VerticalScrollbar",
"position": [785, 0],
"bounds": [15, 600],
"contentsOpaque": true
}
]
}
Layer tree when the fixed elements are in-view (both fixed elements should have layers):
{
"layers": [
{
"name": "Scrolling background of LayoutView #document",
"bounds": [785, 4016],
"contentsOpaque": true,
"backgroundColor": "#FFFFFF"
},
{
"name": "LayoutBlockFlow (positioned) DIV id='fixed1'",
"bounds": [10, 10],
"contentsOpaque": true,
"backgroundColor": "#C0C0C0",
"transform": 1
},
{
"name": "LayoutBlockFlow (positioned) DIV id='fixed2'",
"bounds": [10, 10],
"contentsOpaque": true,
"backgroundColor": "#C0C0C0",
"transform": 2
},
{
"name": "VerticalScrollbar",
"position": [785, 0],
"bounds": [15, 600],
"contentsOpaque": true
}
],
"transforms": [
{
"id": 1,
"transform": [
[1, 0, 0, 0],
[0, 1, 0, 0],
[0, 0, 1, 0],
[100, 50, 0, 1]
]
},
{
"id": 2,
"transform": [
[1, 0, 0, 0],
[0, 1, 0, 0],
[0, 0, 1, 0],
[100, 100, 0, 1]
]
}
]
}
Layer tree when the fixed elements are out-of-view again (should have just a root layer):
{
"layers": [
{
"name": "Scrolling background of LayoutView #document",
"bounds": [785, 4016],
"contentsOpaque": true,
"backgroundColor": "#FFFFFF"
},
{
"name": "VerticalScrollbar",
"position": [785, 0],
"bounds": [15, 600],
"contentsOpaque": true
}
]
}