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16 lines
486 B
16 lines
486 B
import assertString from './util/assertString'; |
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var defaultOptions = { |
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loose: false |
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}; |
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var strictBooleans = ['true', 'false', '1', '0']; |
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var looseBooleans = [].concat(strictBooleans, ['yes', 'no']); |
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export default function isBoolean(str) { |
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var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : defaultOptions; |
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assertString(str); |
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|
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if (options.loose) { |
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return looseBooleans.includes(str.toLowerCase()); |
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} |
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|
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return strictBooleans.includes(str); |
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} |