Missing Concepts in JavaScript certification

This lecture on scope doesn’t mention var, scope chain, variable shadowing and Temporal Dead Zone. These concepts belong to scope, no? Shouldn’t we include them?

Cannot include every single piece of information in each lesson. It needs to be kept down to a manageable size with the most important information for beginners to learn first.

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Can we add a lecture with such advanced concepts so to not make the platform beginner-only?

the curriculum is geared toward beginners

for everything else we have freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More

but if you want to propose a lesson on that, feel free to open an issue on github