Comments (1)
Implementing this actually seems a bit trickier than what I would have thought initially:
- Prior to the reply being received, the line of code in the DOM is only split into tokens for the purpose of highlighting: some lines are entirely rendered as a single DOM node
- Consequently, hovering a single language token will make the entire line DOM node hovered
- When the server reply arrives, we split the line node into new sub-nodes
- The issue is that browsers don't seem to recompute the hovered state of those new nodes until the mouse is moved again
- That makes it difficult to know precisely which new sub-node is currently hovered
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