jQuery 1.6.4, HTML, CSS, JavaScript
No-Library (pure JS), HTML, CSS, JavaScript
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Combine up to 10 colors and get the RGB and HEX of the final mixed color.
Converts tabs to (4) spaces
All jQuery selectors collected in one table showing the selectors' release version (of jQuery) and whether they are native or a jQuery extension.
Specifying CSS's line-height property using unit-less values, is much more flexible (with regard to cascade and inheritance) than using an em-value or a %-value.
What's more important? *:first-child {} or :first-child {} * {} or body {}