var hasOwn = {}.hasOwnProperty;
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/* eslint-disable no-continue, prefer-spread */
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export default function fmtClass() {
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var classes = [];
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for (var i = 0; i < arguments.length; i++) {
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var arg = i < 0 || arguments.length <= i ? undefined : arguments[i];
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if (!arg) continue;
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var argType = typeof arg;
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if (argType === 'string' || argType === 'number') {
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classes.push(arg);
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} else if (Array.isArray(arg) && arg.length) {
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var inner = fmtClass.apply(null, arg);
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if (inner) {
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classes.push(inner);
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}
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} else if (argType === 'object') {
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for (var key in arg) {
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if (hasOwn.call(arg, key) && arg[key]) {
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classes.push(key);
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}
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}
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}
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}
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return classes.join(' ');
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}
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