Identity in Javascript

"Proof by analogy is fraud." ~ Bjarne Stroustrup






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On Abstractions: Simplify by omiting unimportant details and writing deep modules

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Modular Design Good software is almost always decomposed into modules that are relatively independent of each other. Independent modules makes congitive load easier on the developer working on the software. In an ideal scenario this independence is hard to achive. A good guiding principle to create best modules is to write deep modules. Deep Modules  Shallow Modules
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til: localhost & 127.0.0.1 are not same origin 🤯

The IP address for localhost is traditionally 127.0.0.1, so you’d expect http://localhost:9999 and http://127.0.0.1:9999 to be the same origin. BUT. The origin comparison only compares the string values of the scheme, host, and port, and knows nothing about what host an IP address maps to. In my example, “localhost” and “127.0.0.1” are different strings, and therefore the request isn’t a same-origin request.
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