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I am working on a UI for an A/B testing web-app. One of the features is traffic allocation, where you can set the percentage of the visitors that will see every variation of the test. For example, 20% will see version A, 30% will see version 2 and 50% - version C. What are good example of tackling this feature? I want people to easily reach exactly 100% and not think as less as possible if the value they gave each variation is getting them exactly to 100%...

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  • The simpliest way is to use two inputs for A and B versions and auto-calculated non-editable field for C version. Standard HTML inputs and a little javascript. Aug 25, 2013 at 16:30
  • Agreed with Alexey. apart from you can also have some presets (20-20-60, 30-30-40 etc...)
    – Awesh
    Aug 27, 2013 at 11:08

2 Answers 2

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I like Alexey's solution.

Alternatively to humble bundle sliders, you can implement multiple handlers in same slider.

Some sample http://jsfiddle.net/q5WEe/1/

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You could use a series of sliders, where moving one automatically adjusts the others so that they add up to a total of 100%. This has been implemented well on the Humble Bundle donation page:

Humble Bundle donation allocation sliders

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