flex-box flow

<form onsubmit="return false" oninput="o.value = a.valueAsNumber + b.valueAsNumber"> <input name="a" id="a" type="number" step="any"/> + <input name="b" id="b" type="number" step="any"/> = <output name="o" for="a b"></output> </form>

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flex-box flow

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Join the 4+ million users, and keep the JSFiddle dream alive.

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Use pre-released features

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Console