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## Cascading
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## Cascading
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Koa middleware cascading in a more traditional way as you may be use to with similar tools -
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Koa middleware cascading in a more traditional way as you may be use to with similar tools -
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this was previously very difficult to make user friendly due to node's callbacks.
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this was previously difficult to make user friendly with node's use of callbacks.
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However with generators we can achieve "true" middlware. Contrasting Connect's implementation which
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However with generators we can achieve "true" middlware. Contrasting Connect's implementation which
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simply passes control through series of functions until one returns, Koa yields "downstream", then
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simply passes control through series of functions until one returns, Koa yields "downstream", then
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control flows back "upstream".
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control flows back "upstream".
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