Today I Learned - Rocky Kev

TIL how Javascript passes data by value, not by reference

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TAGS: javascript primitives gif

In JavaScript, primitive types like Number or String are passed by value, not by reference.

If you want to keep the behavior unified across different data types in JavaScript, wrapping values inside an object.

Objects pass by reference. (Which creates a different problem when you're cloning objects!)

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TIL what is npm Script

Despite their high usage they are not particularly well optimized and add about 400ms of overhead. In this article we were able to bring that down to ~22ms.

TIL fancy methods to transform Javascript Objects

You can use Object.entries(), Object.keys(), Object.fromEntries()...

TIL how to hide your JS code

ONE THING TO NOTE: Encrypting a script is stronger than obfuscation, both methods are still not adequate to protect secret content. Honestly, I don't think it's worth it on a production site, and instead just go with pure server-side if you want security. But it's fascinating.