# resources.FromString breaks resource caching/reloading

**URL:** <https://discourse.gohugo.io/t/resources-fromstring-breaks-resource-caching-reloading/52758>\
**Category:** support\
**Created:** [December 15, 2024, 3:24am UTC](https://discourse.gohugo.io/t/resources-fromstring-breaks-resource-caching-reloading/52758 "2024-12-15T03:24:15Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![akbyrd](https://avatars.discourse-cdn.com/v4/letter/a/aeb1de/32.png) [@akbyrd](https://discourse.gohugo.io/u/akbyrd)\
**Post date:** [December 15, 2024, 3:24am UTC](https://discourse.gohugo.io/t/resources-fromstring-breaks-resource-caching-reloading/52758/1 "2024-12-15T03:24:15Z")

</div>

I’ve been noticing that something about my setup cause Hugo to get a little confused and load old versions of resources until I restart the server. The most noticeable symptom is that if I make a code change in a Typescript file, then change it back it will continue loading the previous version. At any point if I go back to a version of the file that was previously used it will continue loading the most recent version before the change.

It feels like the resource system is caching versions and when a new version is requested that matches a cached version it returns the current version instead of the matching cached version. But that’s just a wild guess.

It’s a bit tricky to get consistent enough behavior for a clear repro, but I think this will work.

I’m running my server with `hugo server -e development`.

I have this partial template. It’s reduced from my actual partial which is using `FromString` because it’s renaming a resource file. `FromString` seems to be the thing causing the issue.

```auto
{{ $resource := resources.Get . | js.Build }}
{{ $resource = $resource.Content | resources.FromString . }}
{{ return $resource.RelPermalink }}

```

I’m using the partial template with

```auto
{{- with partial "resource" "res/main.ts" }}
	<script src="{{ . }}"></script>
{{- end }}

```

In my Typescript file I’m commenting and uncommenting the same line of code and watching to see if the generated file in `public` changes. Typically what I see is that the generated file never updates when toggling the comment.

If I add `--disableFastRender` it works correctly and each time I toggle the comment the file is updated. (Note: this option isn’t desirable because it stops the page in the browser from live reloading when making code changes. I’m not sure it’s working correctly.)

If I actually change the resource name the generated file is updated correctly once then stops being updated (until I make a change to the code that is new and isn’t “cached”)

```auto
{{ $resource := resources.Get . | js.Build }}
{{ $name := replaceRE `\.ts\z` ".js" . }}
{{ $resource = $resource.Content | resources.FromString $name }}
{{ return $resource.RelPermalink }}

```

I know I’m coloring a bit outside the lines here.

`--ignoreCache` and `--noHTTPCache` don’t appear to have an impact.

It’s also worth noting that changing the partial template while the server is running doesn’t change the behavior. I have to restart the server. For example, if I’m using `resources.FromString` and reloading is not working and I remove `FromString` reloading remains broken until a server restart.

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**Author:** ![jmooring](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.gohugo.io/jmooring/32/4214_2.png) [@jmooring](https://discourse.gohugo.io/u/jmooring)\
**Post date:** [December 15, 2024, 4:30am UTC](https://discourse.gohugo.io/t/resources-fromstring-breaks-resource-caching-reloading/52758/2 "2024-12-15T04:30:23Z")

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I’ve read this a few times, and I don’t understand why you are using the `resources.FromString` function.

Unless I’m missing something, it seems like you could just specify the `targetPath` in the options map passed to the `js.Build` function.

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<div class="post-metadata">

**Author:** ![akbyrd](https://avatars.discourse-cdn.com/v4/letter/a/aeb1de/32.png) [@akbyrd](https://discourse.gohugo.io/u/akbyrd)\
**Post date:** [December 15, 2024, 4:42am UTC](https://discourse.gohugo.io/t/resources-fromstring-breaks-resource-caching-reloading/52758/3 "2024-12-15T04:42:28Z")

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I don’t think I knew about `targetPath`. I’ll give that a shot real fast. If it works that at least gives me a way to avoid the issue.

Sorry if it’s hard to follow. It’s tricky to communicate the issue clearly. Happy to provide additional detail if needed.

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<div class="post-metadata">

**Author:** ![akbyrd](https://avatars.discourse-cdn.com/v4/letter/a/aeb1de/32.png) [@akbyrd](https://discourse.gohugo.io/u/akbyrd)\
**Post date:** [December 15, 2024, 4:45am UTC](https://discourse.gohugo.io/t/resources-fromstring-breaks-resource-caching-reloading/52758/4 "2024-12-15T04:45:21Z")

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Oh, I remember why I’m not using `targetPath` now. Because I use this resource renaming for multiple asset types, not just Typescript/Javascript.

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<div class="post-metadata">

**Author:** ![jmooring](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.gohugo.io/jmooring/32/4214_2.png) [@jmooring](https://discourse.gohugo.io/u/jmooring)\
**Post date:** [December 15, 2024, 4:46am UTC](https://discourse.gohugo.io/t/resources-fromstring-breaks-resource-caching-reloading/52758/5 "2024-12-15T04:46:16Z")

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Have you looked at `resources.Copy`?

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<div class="post-metadata">

**Author:** ![akbyrd](https://avatars.discourse-cdn.com/v4/letter/a/aeb1de/32.png) [@akbyrd](https://discourse.gohugo.io/u/akbyrd)\
**Post date:** [December 15, 2024, 5:19am UTC](https://discourse.gohugo.io/t/resources-fromstring-breaks-resource-caching-reloading/52758/6 "2024-12-15T05:19:54Z")

</div>

I don’t recall a specific reason for using `FromString` over `Copy`. There was a [potential issue](https://github.com/gohugoio/hugo/issues/6241#issuecomment-2002183557) with it a while back, but I’m not running into it locally.

I’ve swapped to `Copy` and it looks like it behaves correctly. As a bonus it’s a lot faster - 16ms → 8ms to rebuild.