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Example config leads to an error (Must install one of: '+libs.join()) #80

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folmert opened this issue Jul 1, 2016 · 4 comments
Closed

Example config leads to an error (Must install one of: '+libs.join()) #80

folmert opened this issue Jul 1, 2016 · 4 comments

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@folmert
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folmert commented Jul 1, 2016 •
edited by ai

I merged the example from Usage instructions with my webpack.config.js:

var precss       = require('precss');
var autoprefixer = require('autoprefixer');

module.exports = {
    module:  {
        loaders: [
            {
                test:   /\.css$/,
                loader: "style-loader!css-loader!postcss-loader"
            }
        ]
    },
    entry:   ["./entry.js",
        './analytics.js'
    ],
    output:  {
        filename: "./bundleAnalytics.js"
    },
    watch:   true,
    postcss: function () {
        return [precss, autoprefixer];
    }
};

but when I try to run webpack it returns:

[my project's path]\node_modules\precss\node_modules\postcss-partial-import\node_modules\fs-promise\node_modules\any-promise\any-promise.js:32
  throw new Error('Must install one of: '+libs.join());
        ^
Error: Must install one of: es6-promise,promise,native-promise-only,bluebird,rsvp,when,q
    at [my project's path]\node_modules\precss\node_modules\postcss-partial-import\node_modules\fs-promise\node_modules\any-promise\any-promise.js:32:9
    at Object.<anonymous> ([my project's path]\node_modules\precss\node_modules\postcss-partial-import\node_modules\fs-promise\node_modules\any-promise\any-promise.js:33:3)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Module.require (module.js:364:17)
    at require (module.js:380:17)
    at Object.<anonymous> ([my project's path]\node_modules\precss\node_modules\postcss-partial-import\node_modules\fs-promise\index.js:4:12)
    at Module._compile (module.js:456:26)
@ai
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ai commented Jul 1, 2016

Please show me node -v output?

@folmert
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folmert commented Jul 1, 2016 •
edited

v0.10.26

After running npm update the output's still the same, so I assume it's the newest version...?

Installing: npm install es6-promise helped me to get rid of this error.

But I still don't get it how it works.

Now your CSS files requirements will be processed by selected PostCSS plugins:
var css = require('./file.css');

Where I put this var css and what does it do?
If I put it in one of my .js files where exactly this file.css will be appended?
Edit: nvm, I see it now at the end of the <head>

@ai
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ai commented Jul 1, 2016

You should update your node.js. Current version is 6.0 ;).

@ai ai closed this as completed Jul 1, 2016
@ai
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ai commented Jul 1, 2016

postcss-loder will compile CSS, that you will use in webpack.

So when you write require('./some/path/to/style.css') it will be processed by PostCSS.

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@ai @folmert