CSS clears floating methods and code

For a front-end designer, often using CSS design pages, for clear floating seems to be a more basic skill, but there are many ways and code to clear the float, today to share a popular and many large projects have been adopted in the CSS clear floating code. This code is derived from Positioniseverything, which is fully compatible with the current mainstream browsers by following pseudo classes: After and Iehack.

The above code is a standard pattern, the effect and compatibility are quite excellent, but some friends always worry about the impact of too much code, you can optimize this, do not affect the cleaning effect, is also very good: