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electerious/toClassString.js

Created January 21, 2017 15:48
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Conditionally convert the keys of an object to a string of class names
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toClassString.js
const toClassString = (obj) => Object.keys(obj).filter((key) => obj[key]===true).join(' ').trim()
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Example:

const classes = {
	enter: true,
	entering: true,
	leave: false,
	leaving: false
}

toClassString(classes) // 'enter entering'

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