Gatsby: [v2] Warning in browser console during gatsby serve (after build)

[rtm619]

Summary

Chrome throws a warning in console during gatsby serve.

Relevant information

The warning is : The resource http://localhost:9000/static/d/708/path---en-869-cd4-rxXbyoDAkJ1rXH07VFHKZjmdHQI.json was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it has an appropriateasvalue and it is preloaded intentionally.

It doesn't cause any problems, just throws a warning. Any clue as to why it does?

Environment (if relevant)

System:
OS: Windows 10
CPU: x64 Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz
Binaries:
Yarn: 1.7.0 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
npm: 5.6.0 - C:\Program Files\nodejs\npm.CMD
Browsers:
Edge: 41.16299.611.0
npmPackages:
gatsby: 2.0.0-rc.0 => 2.0.0-rc.0
gatsby-image: 2.0.0-rc.0 => 2.0.0-rc.0
gatsby-link: 2.0.0-rc.0 => 2.0.0-rc.0
gatsby-plugin-canonical-urls: 2.0.0-rc.0 => 2.0.0-rc.0
gatsby-plugin-google-analytics: 2.0.0-rc.0 => 2.0.0-rc.0
gatsby-plugin-google-tagmanager: 2.0.0-rc.0 => 2.0.0-rc.0
gatsby-plugin-i18n: 0.4.2 => 0.4.2
gatsby-plugin-manifest: 2.0.2-rc.0 => 2.0.2-rc.0
gatsby-plugin-offline: 2.0.0-rc.0 => 2.0.0-rc.0
gatsby-plugin-purify-css: 2.2.1 => 2.2.1
gatsby-plugin-react-helmet: 3.0.0-rc.0 => 3.0.0-rc.0
gatsby-plugin-remove-trailing-slashes: ^1.0.9 => 1.0.9
gatsby-plugin-robots-txt: 1.3.0 => 1.3.0
gatsby-plugin-sharp: 2.0.0-rc.0 => 2.0.0-rc.0
gatsby-plugin-sitemap: 2.0.0-rc.0 => 2.0.0-rc.0
gatsby-source-contentful: 2.0.1-rc.0 => 2.0.1-rc.0
gatsby-transformer-remark: 2.1.1-rc.0 => 2.1.1-rc.0
gatsby-transformer-sharp: 2.1.1-rc.0 => 2.1.1-rc.0

[johncmunson]

I'm getting this same issue, both when using gatsby serve and after deploying to netlify

[shannonjensen]

I am getting the same issue, throwing 7 of the same warnings for various js bundles

[bogdancss]

same here

[RJGrunau]

I am as well. @rtm619 did you find solution?

[coughlanio]

I'm getting the following locally & running in S3 and Netlify:

The resource https://foo.bar/static/d/520/path---offline-plugin-app-shell-fallback-a-30-c5a-NZuapzHg3X9TaN1iIixfv1W23E.json was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it has an appropriate `as` value and it is preloaded intentionally.

[ghost]

The site of Gatsby and my new npm.cardiv.de are throwing the same warnings for me (Chrome), but both for a json file which seems to come from the offline plugin.

The same as @coughlanio mentioned. Maybe because it's a fallback file that doesn't need to be loaded in Chrome (and therefore, the browser doesn't use that file)?

[pieh]

We should defenitely drop preload link for .json from offline shell.

If anyone would want to take a stab at this:
We would need gatsby-ssr.js file in https://github.com/gatsbyjs/gatsby/tree/master/packages/gatsby-plugin-offline/src

In there we would want to implement onPreRenderHTML API hook:

• check if pathname is /offline-plugin-app-shell-fallback/ (seems like pathname is not documented in our API reference :/)
• get list of head components (getHeadComponents)
• filter out "preload" component for .json (we might want to check if as attribute is "fetch" and maybe for sanity check href (if it contains/starts with /static/d/ )
• use replaceHeadComponents to update the list (with one that has the preload link for that .json` file removed)

[gatsbot[bot]]

Hiya!

This issue has gone quiet. Spooky quiet. 👻

We get a lot of issues, so we currently close issues after 30 days of inactivity. It’s been at least 20 days since the last update here.

If we missed this issue or if you want to keep it open, please reply here. You can also add the label "not stale" to keep this issue open!

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[kalm42]

Replying. I'll take a stab at this.

[gatsbot[bot]]

Hey again!

It’s been 30 days since anything happened on this issue, so our friendly neighborhood robot (that’s me!) is going to close it.

Please keep in mind that I’m only a robot, so if I’ve closed this issue in error, I’m HUMAN_EMOTION_SORRY. Please feel free to reopen this issue or create a new one if you need anything else.

Thanks again for being part of the Gatsby community!

[Razatastic]

At first, this only happened locally, but now it's also happening on Netlify. Any resolution for this yet?

[judah-firewood]

Same

[jeroenoomsNL]

Same here!

[hupe1980]

Same here!
@pieh I have implemented your solution and created a PR #13935

[futhr]

The issue is still there using:

gatsby-plugin-offline v2.2.4
gatsby v2.13.31

The resource https://mydomain.netlify.com/page-data/offline-plugin-app-shell-fallback/page-data.json was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it has an appropriate `as` value and it is preloaded intentionally.

[ytric]

I am getting the same issue. any update?

[barrymichaeldoyle]

A few months later and I'm still experiencing the same issue. Any updates?

[Z11]

Yeah i'm still seeing this issue