Not properly prevented contenteditable=true text selection while dragging Dragger

[jksdou]

The attribute "user-select: none" added to body when the scrollbar is onclick and ondrag
while, After setting the body user-select: none attribute,
When dragging any content(especially the scrollbar or content outside this contentitableitabled element), and passing through the Elements with attribute contentitableitable = "true" will cause this contentitableitabled Elements content to be selected