Batch DOM read and write operations to prevent forced synchronous layouts.
- Batch DOM read and write operations to prevent forced synchronous layouts1 cited source1 category
Save for later 0
Use × to move an item here. You can restore it when you’re ready.
Your checks and saved items stay in this browser. Nothing is submitted.
Why this matters
Separating reads and writes avoids layout thrashing and improves frame performance.
Hypothetical standard operating procedure
Adapt this example to your site, access, tools, and change process. It is our suggested procedure, informed by the sources below.
- Review code to identify DOM reads and writes.
- Rearrange code to perform all reads upfront before any writes.
- Consider using helper libraries like FastDom for automatic batching.
- Test performance and check devtools for reduced forced synchronous layouts.
- Iterate to refactor complex interactions accordingly.
Watch for
Interleaving reads and writes causes repeated layout recalculation and jank.
Definition of done
JavaScript performs all DOM reads before writes, minimizing forced layout events.
Sources & attribution
Original checklist wording and example SOP by Best SEO Checklist, using source-grounded AI assistance. Editorial contact: Ted Kubaitis, @tedkubaitis on Teams. Check current source guidance before implementation.