Přestaňte hádat a začněte vědět. Praktický rozbor toho, jak JS engine spravuje proměnné, proč funkce je objekt a jak díky pochopení vnitřních mechanismů psát čistší kód bez zbytečných chyb.

Temporal Dead Zone Breaks Code!

JavaScript's Temporal Dead Zone will crash your code! Accessing let/const before declaration throws an error. Watch the chaos!

#javascript #javascripttricks #codingtips #programmingtutorial #temporaldeadzone #javascriptquiz #codingchallenge #javascriptshorts #javascriptbugs #hoisting #javascriptwtf #letconst

#Summer #Lifting #Hoisting #photography #CraneWork #hauling

Okay folks, just sit back and enjoy your summerday.

I'll do the heavy lifting.

#MikeLuckovich #Trump #funnies #hoisting

https://www.democraticunderground.com/119813308

New post: https://codito.in/frontend-refactoring-notes/

We talk about some lessons for a beginner developer like dependencies, hoisting, shipping source or bundle, using linters to guide a clean architecture and so on.

#frontend #npm #hoisting #dependencies #architecture #eslint #cleancode #software #refactoring

I've always preferred `function`-style over lambda style (`() => {}`) for named functions in #JavaScript because I think it's less confusing for newcomers and you can take advantage of #hoisting which can be a useful feature.

However, thinking about it again, hoisting can also lead to a lot of confusion as it leads to temporal dead zone which can be super confusing, even to experienced developers.

```
doSomething();
let value = 1;
function doSomething(): void {
// ERR: Cannot access 'value' before initialization
console.log(value);
}
```

Based on that, I wonder if lambda style might actually be less confusing for new JS devs just because it avoids that entire class of footgun.

In practice I find this kind of issue to be relatively rare, but maybe new devs encounter it more frequently than I think.

I guess the question here is: Is JS function hoisting a useful feature or an antipattern to avoid?

「巻き上げ」の誤解【JS】
https://qiita.com/kohki_takatama/items/0aeb419bda555f8c240e?utm_campaign=popular_items&utm_medium=feed&utm_source=popular_items

#qiita #JavaScript #巻き上げ #hoisting