1480345 - Add the ability to inject scripts in the current page (:inject)

Status: RESOLVED FIXED

(DevTools :: Console, enhancement, P3)

Description

[Florens Verschelde :fvsch]

The GCLI had an inject command that could be used to inject scripts in the current page. I think it also had some some shortcuts such as `inject jquery` that resolved to preconfigured URLs?

This was probably not used a lot, since when it got broken last year it took a while to get a bug report (bug 1409428). It would still be useful for injecting scripts in the inspected page for testing.

One alternative for console users looks like:

document.body.insertAdjacentHTML('beforeend', '<script src="script_url_here"></script>')

which is a bit painful to type, compared to:

:inject 'script_url_here'

To make it more useful even, it might be possible to load JS from unpkg.com. For instance `:inject jquery` could resolve to `:inject https://unpkg.com/jquery`, which loads https://unpkg.com/jquery@3.3.1/dist/jquery.js
(Trouble is, not all packages have a main file that is suitable for loading in a web page; many point to a CommonJS file. But they may have a `"browser": "relative_url"` key in package.json.)

Comment 1

[Florens Verschelde :fvsch]

Meta bug is bug 1429421.

Comment 2

[Nicolas Chevobbe [:nchevobbe]]

Florens, it looks like dynamic import provides this right?
Should we close this bug?

Comment 3

[Florens Verschelde :fvsch]

I think we can close it.

I'm a bit concerned about the documentation and developer experience side, because users may not know that it's a possibility. At the same time, I'm not seeing this need expressed by many users so it's probably fairly niche? I don't think the GCLI inject command had a lot of use.