1887568 - Function in SVG global evaluated despite having side effects

Status: NEW

(DevTools :: Console, defect, P3)

Description

[gyorokpeter1]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:124.0) Gecko/20100101 Firefox/124.0

Steps to reproduce:

Extract the attached .zip file and open test.html via a HTTP server (it doesn't work if opened via file://). Open the console with F12, make sure that "Instant Evaluation" is enabled, and start typing:
panelJs.a
Then type an opening parenthesis, delete it and type again.

Actual results:

The result preview appears and shows a different number each time, since the function changes a global variable every time it is called.

Expected results:

The function should not be called during preview because it has a side effect.

Comment 1

[Monica Chiorean]

Reporter, can you please attach the mentioned .zip file. Thank you.

Comment 2

[gyorokpeter1]

Attachment: html.zip

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'DevTools::Console' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 4

[Nicolas Chevobbe [:nchevobbe]]

simpler str:

1. Go to https://ffx-devtools-svg-script-instant-evaluation.glitch.me/
2. Open the console
3. Type panelJs.a()

expected result: no instant evaluation
actual result: instant evaluation is displayed, modifying the v variable's value

Comment 5

[Monica Chiorean]

I was able to reproduce the issue on Win11 x64 using Firefox build 128.0a1 and steps from comment#4.