Title: Missing source maps for large first-party JavaScript
Last modified: October 26, 2022

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# Missing source maps for large first-party JavaScript

 *  [Insect Trojan](https://wordpress.org/support/users/insecttrojan/)
 * (@insecttrojan)
 * [3 years, 7 months ago](https://wordpress.org/support/topic/missing-source-maps-for-large-first-party-javascript/)
 * hello can you help me with this on google insights it tells me Missing source
   maps for large first-party JavaScript on Autoptimize .js
    thanks a lot
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fmissing-source-maps-for-large-first-party-javascript%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * (@optimizingmatters)
 * [3 years, 7 months ago](https://wordpress.org/support/topic/missing-source-maps-for-large-first-party-javascript/#post-16134647)
 * Afraid AO does not create source maps (which are only used in the browser for
   debugging purposes and used by Lighthouse to be able to break down large JS files
   in smaller chunks).
 * You could off course disable “aggregate JavaScript” and switch to “don’t aggregate
   but defer JS” + “also defer inline JS” instead? 🙂

Viewing 1 replies (of 1 total)

The topic ‘Missing source maps for large first-party JavaScript’ is closed to new
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 * 1 reply
 * 2 participants
 * Last reply from: [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * Last activity: [3 years, 7 months ago](https://wordpress.org/support/topic/missing-source-maps-for-large-first-party-javascript/#post-16134647)
 * Status: not resolved