jQuery (edge), HTML, CSS, JavaScript
jQuery 1.8.3, HTML, CSS, JavaScript
jQuery 1.6.2, HTML, CSS, JavaScript
jQuery 1.7.2, HTML, CSS, JavaScript
jQuery 3.2.1, HTML, CSS, JavaScript
jQuery 2.2.4, HTML, CSS, JavaScript
Mootools 1.4.5, HTML, CSS, JavaScript
Demonstrates a CSS content bug apparently only happening in IE8. In a working scenario, you'll see both the content (hello world) and the background color appear in alerts.