[angelmm]

Now I'm worried of using IDs and finding issues with globals in JavaScript. Seems to be a curious issue to be debugged.

[mmastrac]

Avoid globals at all costs - use IIFE [1] instead, wrapping your function in parenthesis and invoking it right away.

[1] https://developer.mozilla.org/en-US/docs/Glossary/IIFE

[recursive]

If you have access to `let`, you can just put `let` declarations into a block. No need for a function to establish scope.

[an1sotropy]

When, today, does it make more sense to organize things around IIFEs and not ES6 modules?

[WorldMaker]

It's 2022, you can use ES2015 modules now. We can leave IIFE to the dustbin of the past.

[jbverschoor]

And then get coworkers to remove it because they don’t understand that you can create scopes like that

[throw_m239339]

    {
        let foo = 1
    };
    // foo is undefined here

[Slackwise]

If you read the article and the spec, you'll see that any explicitly created variables will always take precedence over automatic IDs, so any globals will always override these IDs.

[angelmm]

In the additional considerations section [1], they mention about not consistent behaviors between browsers. Those are the kind of issues that are quite difficult to debug.

[1] https://css-tricks.com/named-element-ids-can-be-referenced-a...

[croes]

And that could be the problem if you try to access an element by id but a variable has the same name. This renders this option pretty useless.

[bhhaskin]

You shouldn't be using IDs anyways. They are just bad for a lot of reasons. You can only have one on a page and it reduces your reusability. Use classes instead.

[err4nt]

ID's aren't bad, they're unique identifiers, and useful for (deep) linking to specific pieces of content within documents. Please use ID's as liberally as you please, and use them for their proper use.

[goatlover]

Use ids when JS needs to reference unique elements. Use classes for styling and accessing groups.

[isleyaardvark]

JS can do just as well with unique classnames, which avoids issues with ids like those given in the article.

[sgc]

I always presumed this would usually entail a performance hit, since you are accessing something that is not defined as unique.

[isleyaardvark]

It's an infinitesimal performance decrease, and it avoids a lot of other issues.