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Is it possible to add to an existing asset (e.g. appending HTML tags to the |
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Replies: 1 comment 11 replies
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Runtimes can add additional assets, so you can add a javascript asset that runs before a bundle's actual entrypoint is run: parcel/packages/runtimes/react-refresh/src/ReactRefreshRuntime.js Lines 31 to 35 in d33fcd9 In the case of HTML, the whole file is one asset (since 1 HTML source file becomes 1 HTML bundle), and multiple HTML assets in the same bundle don't have a defined order. (Note that this is a rather arbitrary implementation decision in WIP (plugin) docs: https://parcel2-docs.now.sh/plugin-system/ |
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You can also return a completely different asset in a transformer. The reason that there are usually child assets is imports to an asset need to obviously resolve to one single asset. |
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From my testing and analysis of the codebase, when TransformerResult objects are returned from transformers, they are automatically converted to child assets no matter what. In fact, the filename of the asset is even overwritten by the filename of the original asset + the extension of the new asset (and a fingerprint). I need the filename to NOT be overwritten and the contents to not change. Essentially, I have to write to the filesystem but want to do it through a parcel asset for caching purposes and prettier output. Is that possible? |
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Also, second issue, Transfomers seem to only be able to return three assets (including the original asset), and any extra assets beyond 3 don't get emitted to the final output. |
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I haven't look into your previous comment further, but
Is it possible that you are returning TransformerResults that have the same type and not a unique parcel/packages/transformers/html/src/inline.js Lines 89 to 99 in d33fcd9 |
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As it turns out, yes, it was the lack of |
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Runtimes can add additional assets, so you can add a javascript asset that runs before a bundle's actual entrypoint is run:
parcel/packages/runtimes/react-refresh/src/ReactRefreshRuntime.js
Lines 31 to 35 in d33fcd9
In the case of HTML, the whole file is one asset (since 1 HTML source file becomes 1 HTML bundle), and multiple HTML assets in the same bundle don't have a defined order. (Note that this is a rather arbitrary implementation decision in
@parcel/packager-html, you could write your own packager.)WIP (plugin) docs: https://parcel2-docs.now.sh/plugin-system/