-- Simple editing host --
Range: [object Text] 1 [object Text] 2
<DIV id="a">
-- Editing host with nested <span> --
Range: [object Text] 1 [object Text] 1
<DIV id="b">
-- Refocusing on same editing host --
Range: [object Text] 0 [object Text] 0
<DIV id="b">
-- Nested editing host --
Range: [object Text] 0 [object Text] 3
<DIV id="d">
-- Nested editing host with uneditable element as parent --
Range: [object Text] 0 [object Text] 3
<SPAN>