efa74c5c6e
ac2c4a487 Update documentation for Ugly URLs (#1082) 88bdec17a Change 072.0 to 0.72.0 in release post's description 2aa7d7818 Update rss.md (#1104) c80677aeb Update quick-start.md (#1076) d04196bbd Minor spelling and capitalization fixes 837d2feba Fixed spelling mistake 67dc78e12 Update installing.md ce280c5d6 Update relurl.md bb4d0e703 Capitalization and Redirecting URL fixes e1fecada0 Update partials.md 1d99bb182 Typos and whitespacing issues fixed b20dba125 actually fix index function link this time f47d6f1e3 Fixing typos, whitespace issues and links dc82309b9 fix link to the index function 1eab0cbea add missing word (#1130) 9c3ee62ae more fixes e9bc5880a whitespace, typos and HTTPS fixes 93b806493 Add missing word to Module section 80ced9062 Display image on page bundles page. 727029b0a Update index.md 51fc48e4d Release 0.72.0 1ff68ac3b releaser: Add release notes to /docs for release of 0.72.0 f74a25b92 common/maps: Add Scratch.Values 2fd83db96 Add redirect support to the server bdfccf9f4 Fix typo in install instructions e12737ea6 Create SUPPORT.md git-subtree-dir: docs git-subtree-split: ac2c4a4871e90ddfb180f23704ce7ec9023529ca
2.6 KiB
Executable file
| title | description | date | categories | keywords | menu | weight | sections_weight | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PostProcess | Allows delaying of resource transformations to after the build. | 2020-04-09 |
|
|
39 | 39 |
Marking a resource with resources.PostProcess delays any transformations to after the build, typically because one or more of the steps in the transformation chain depends on the result of the build (e.g. files in public).{{< new-in "0.69.0" >}}
A prime use case for this is CSS purging with PostCSS.
There are currently two limitations to this:
-
This only works in
*.htmltemplates (i.e. templates that produces HTML files). -
You cannot manipulate the values returned from the resource's methods. E.g. the
upperin this example will not work as expected:{{ $css := resources.Get "css/main.css" }} {{ $css = $css | resources.PostCSS | minify | fingerprint | resources.PostProcess }} {{ $css.RelPermalink | upper }}
CSS purging with PostCSS
{{% note %}}
There are several ways to set up CSS purging with PostCSS in Hugo. If you have a simple project, you should consider going the simpler route and drop the use of resources.PostProcess and just extract keywords from the templates. See the Tailwind documentation for some examples.
{{% /note %}}
The below configuration will write a hugo_stats.json file to the project root as part of the build. If you're only using this for the production build, you should consider placing it below config/production.
[build]
writeStats = true
const purgecss = require('@fullhuman/postcss-purgecss')({
content: [ './hugo_stats.json' ],
defaultExtractor: (content) => {
let els = JSON.parse(content).htmlElements;
return els.tags.concat(els.classes, els.ids);
}
});
module.exports = {
plugins: [
require('tailwindcss'),
require('autoprefixer'),
...(process.env.HUGO_ENVIRONMENT === 'production' ? [ purgecss ] : [])
]
};
Note that in the example above, the "CSS purge step" will only be applied to the production build. This means that you need to do something like this in your head template to build and include your CSS:
{{ $css := resources.Get "css/main.css" }}
{{ $css = $css | resources.PostCSS }}
{{ if hugo.IsProduction }}
{{ $css = $css | minify | fingerprint | resources.PostProcess }}
{{ end }}
<link href="{{ $css.RelPermalink }}" rel="stylesheet" />