Posted on • Edited on • Originally published at codeperfectplus.com
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This series focuses on learning and practising JavaScript. Each challenge comes with a tutorial article, and you can view these articles by clicking either the Topics tab along the top or the article icon in the right-hand menu.
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In the past few years in the web dev world, we’ve seen a significant push towards rendering our websites on the server. Doing so is better for SEO and performs better on low-powered devices, but one thing we had to sacrifice is TTFB.
In this article, we’ll see how we can identify what makes our TTFB high so we can fix it.
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Type is an everyday concept to programmers, but it’s surprisingly difficult to define it succinctly. I find it helpful to use Set as a conceptual model instead.
One extremely powerful typescript feature is automatic type narrowing based on control flow. This means a variable has two types associated with it at any specific point of code location: a declaration type and a narrowed type.
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