reactjs / reactjs/react.dev

Google Analytics script execution should be deferred

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Dominant language
JavaScript
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Description

Currently GA script executes asynchronously while page is loading without a good reason for doing so since there are no custom GA events being tracked when page load is happening or right after it finishes, it's also showing up in Lighthouse score report as a very small main-thread blocker. Performance-wise it would be better to defer the script execution until the page has finished loading

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the Google Analytics integration used during page loading. Confirm its current asynchronous behavior, then verify the script is deferred until page load and that Lighthouse no longer reports it as a main-thread blocker.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript
Domain
performance, web-dev
Issue type
Refactor
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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