I started working on something that will show URLSearchParams similar to Maps. I did get some simple ones without duplicate keys working. For duplicate keys I am trying to return an array of values for every duplicate key, but that just shows as "Restricted".

The inline preview like map Map { a -> 1 } also doesn't work. Just <entries>.

If someone would like to just take this over that would be fine too.

Maybe it would be better to show new URLSearchParams("?a=1&a=2"); as

<entries>
0: a -> 1
1: a -> 2

after all.

Thanks Tom, I definitely hit that in the past and I agree it would be nice to have a way to inspect this
I'll have a quick look at your WIP

(In reply to Tom Schuster [:evilpie] from comment #2)

Maybe it would be better to show new URLSearchParams("?a=1&a=2"); as

<entries>
0: a -> 1
1: a -> 2

after all.

yeah, I think it would be better to reflect what URLSearchParams#entries returns

So I have something working locally, I need to do further testing and add tests.
Here I'm showing entries with same name as different items, prefixed with the entry index. I think it's nice to match the behavior of URLSearchParams.prototype.entries

If you're curious evilpie:

• as you saw, URLSearchParams wasn't available by default, I made it available adding it in https://searchfox.org/mozilla-central/rev/287583a4a605eee8cd2d41381ffaea7a93d7b987/devtools/shared/loader/builtin-modules.js#53-100
• URLSearchParams entries will always be strings, so we don't have the same complexity as for Maps where both keys and values can be complex objects; this makes the implementation much easier (getting the entries fits in one line: const entries = [...waiveXrays(URLSearchParams.prototype.entries.call(raw))];)

Oh that looks great. I think in my testing properties with the same name under <entries> were being de-duplicated, but it seems like you are already solved that issue or I made some other mistake.

https://hg.mozilla.org/mozilla-central/rev/d30a9af34461