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Unexpected appendChild of text nodes during render with merge

See original GitHub issue

I’m currently working on a Preact app with server rendering. So, I use render() with the third argument root.lastChild. As I render the same data on client and server, I expect this render to do nothing to real DOM nodes, except attaching events. But I see appendChild in the call tree. As a result, first rendering on client takes longer than expected (and longer than alternative libraries).

Naive debugging lead to a conclusion that this happens to text nodes. Looks like text node is not considered an existing child during diffing.

Before I go deeper into debugging, I’d like to know if this is an expected behavior and what are reasons for that.

Issue Analytics

State:
Created 7 years ago
Reactions:1
Comments:7 (5 by maintainers)

Top GitHub Comments

1reaction

bardtcommented, Jul 1, 2016

@developit I can still see several createElement and appendChild calls. Should I provide an example?

0reactions

developitcommented, Jul 24, 2016

Closing since I’ve done as much testing as I can find time for and can’t see new textnodes being created. Please re-open if there is still an issue in 5.6.0!