30 lines
689 B
JavaScript
30 lines
689 B
JavaScript
const invariant = require('invariant');
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const createAssets = require('./utils/createAssets');
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/**
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* An express middleware that sets req.assets from the
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* latest result from a running webpack compiler (i.e. using
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* webpack-dev-middleware). Should only be used in dev.
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*/
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function devAssets(webpackCompiler) {
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let assets;
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webpackCompiler.plugin('done', stats => {
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assets = createAssets(stats.toJson());
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});
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return (req, res, next) => {
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invariant(
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assets != null,
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'devAssets middleware needs a running compiler; ' +
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'use webpack-dev-middleware in front of devAssets'
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);
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req.assets = assets;
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next();
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};
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}
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module.exports = devAssets;
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