User Specified Javascript

Opera 8 introduces the ability to execute a user javascript file in every page loaded, a bit like the browser stylesheet. This allows one to add in javascript fixes for any sites that need them, and enhance sites with new functionality.

Scripts [⊗]

The unofficial central script repository: http://userjs.org/

Collections

• Tarquin's Scripts — Several scripts by JavaScript guru TarquinWJ.
• Rijk's Collection — more goodness from Maestro Rijk...
• Probleemsites — ScipioNeer's personal website contains some UserJS scripts to fix various web sites (descriptions in Dutch and English, depending on the web site's language). A few of those cases are also discussed in his journal (in English).
• Opera userJS files - Jordi Kroon's UserJS files, which enhance the working of Opera's FastForward? feature.

Individual scripts

• AutoFill — A script to save form data for any page and then autofill it again when revisiting the page (link "Автозаполнение форм в Opera 8", in Russian).
• Full cloak | Minimal Cloak — by Andrew Gregory, it queries the user-agent string, and if Opera is using the user agent cloaking of ua.ini (settings 4 / 5) it will also add in a javascript stealthing mechanism.
• Proper Auto Root Signatures and User Javascript plus an update
• An Ad-Blocking UserJS
• Ultimate Highlight JS — by Luchio, allows you to highlight many keywords on any webpage.
• Sticky Notes — by robodesign, allows you to add sticky notes to any page (like yellow Post-it flag).
• grab URL + title — takes the URL of an opened web page with the title in brackets and makes them pastable from the clipboard.

Documentation [⊗]

The official documentation by Opera

• Hallvord's journal — The original post announcing this feature, Advanced User JS: Event Handlers explained, User JavaScript in Opera 8 final
• Rijk — Valuable info and a lot of example bits from Rijk
• Arve — Some more discussion by Arve.
• A Free Greasemonkey guide (much of which will be applicable to Opera) can be found here: http://diveintogreasemonkey.org/toc/

How to add scripts [⊗]

To add the scripts, make a directory and point Opera at it using Preferences » Advanced » Content » Javascript options » My javascript files:

You can then simply drop scripts into that directory and Opera will use them automatically. If you want to limit their effects to particular web sites, you can use comment metadata to do so:

// ==UserScript==
// @include http://example.com/*
// @include http://www.example.com/*
// @exclude http://example.com/directory/*
// @exclude http://www.example.com/example.html
// ==/UserScript==

Note: Peter Karlsson aka nafmo said:

Setting up a script environment on a page costs memory, so Opera only does it if it actually encounters a script tag. However, without that, user JavaScripts can't be executed.

You can force Opera to run User JavaScript on other pages by adding

[User Prefs]
Always Load User JavaScript=1

to your opera6.ini file.

Historical Interlude [⊗]

Here is a post from a current developer and maintainer of the GreaseMonkey repository — note Rijk's comment is interesting for Opera users:

Opera’s userscript support has been developed during the year 2004, before Greasemonkey, as part of larger modifications of Opera’s core. This part was interesting enough for power-users to put into the current beta release, but it is only a small part of what we’ve been working on. Expect more in the future.

Rijk has later embellished this with:

It should be noted that Greasemonkey was not the inspiration for developing User JavaScript, as CNet.com seems to imply. This idea had come up between Jonny A. (Opera tech thinker) and Lars H., (our main JavaScript guy) in 2002 already, and the code was actually written last year.

Categories

CategoryOpera
CategoryTechnical

Backlinks

1. ВнешниеУтилиты
2. GreaseMonkey
3. ImprovedCompatibility
4. links-with-icons
5. links-with-iconsRU
6. LiveJournalSidebar
7. LuChio
8. Opera
9. Opera7
10. Opera7Tips
11. Opera8
12. Opera8Beta
13. OperaInnovations
14. OperaJA
15. OperaNumberedLinksScript
16. OperaRU
17. OperaWishList
18. OSpell
19. RozszerzeniaFirefoksaVsOpera
20. SidebarsRU
21. StylingWebPages
22. UltimateHighlightBookmarklet
23. UltimateHighlightBookmarklet(Archive)
24. UserAgentvsUserJS
25. UserJS
26. UserJSJA
27. UserJSRU
28. WebDevToolbar
29. ZmianaWygladuStron

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