How to Override CSS Styles for the \'banner_url\' Class with Greasemonkey/Tampermonkey?

Manipulating Class CSS with Greasemonkey/Tampermonkey

You seek to modify the background image of a page element with the "banner_url" class. The desired CSS property is provided.

Using CSS Cascade with Greasemonkey:

Inject the CSS rules into the page using GM_addStyle(). We recommend the following script:

// ==UserScript==
// @name     _Override banner_url styles
// @include  http://YOUR_SERVER.COM/YOUR_PATH/*
// @grant    GM_addStyle
// @run-at   document-start
// ==/UserScript==

GM_addStyle ( `
    .banner_url {
        background: url('http://www.pxleyes.com/images/contests/kiwis/fullsize/sourceimage.jpg') no-repeat center center fixed !important;
        -webkit-background-size: cover !important;
        -moz-background-size: cover !important;
        -o-background-size: cover !important;
        background-size: cover !important;
    }
` );

Note:

• Use the "!important" flag to prioritize your rules.
• Run the script at document-start to minimize visual flickering during style changes.

Alternatives:

• Tampermonkey/Violentmonkey: Recommended over Greasemonkey 4.
• Stylus: A specialized extension for CSS manipulation.

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