[BUG] Multiple spaces in GM_registerMenuCommand caption get reduced to a single space

[zamora]

Sequence of actions:

1. Install the following userscript:

// ==UserScript==
// @name        Multiple Spaces in Caption Bug
// @namespace   ""
// @match       https://github.com/*
// @grant       GM_registerMenuCommand
// @description Multiple spaces get reduced to a single space in the caption.
// ==/UserScript==

GM_registerMenuCommand("0        9", () => {return;});

2. Go to a page on GitHub, and open the Violentmonkey menu

Problem:

The spaces in the menu caption have been reduced to a single space.

Expected result:

The menu caption should include all of the spaces. Note that the title in the status bar correctly displays all the spaces.

Environment:

• OS: Windows
• Browser: Brave, Version 1.73.105 Chromium: 131.0.6778.265 (Official Build) (64-bit)
• Violentmonkey Version: 2.29.0

[tophf]

I doubt it should be fixed at all because spaces are collapsed by default in DOM unless we explicitly set a different white-space CSS property on these elements, which makes this behavior dependent on UI decisions of a particular extension.

A reliable universal solution is to use a nonbreaking space explicitly:

GM_registerMenuCommand("0        9".replaceAll(' ', '\xA0'), console.log);

You can also type it by hand e.g. Alt-0160 and then copypaste it as needed.

[zamora]

Ok. That makes sense. I got confused because the title displays all the spaces. Thanks for the quick response!