23 lines
880 B
JavaScript
23 lines
880 B
JavaScript
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import assertString from './util/assertString';
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import merge from './util/merge';
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var base64WithPadding = /^[A-Za-z0-9+/]+={0,2}$/;
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var base64WithoutPadding = /^[A-Za-z0-9+/]+$/;
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var base64UrlWithPadding = /^[A-Za-z0-9_-]+={0,2}$/;
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var base64UrlWithoutPadding = /^[A-Za-z0-9_-]+$/;
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export default function isBase64(str, options) {
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var _options;
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assertString(str);
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options = merge(options, {
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urlSafe: false,
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padding: !((_options = options) !== null && _options !== void 0 && _options.urlSafe)
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});
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if (str === '') return true;
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if (options.padding && str.length % 4 !== 0) return false;
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var regex;
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if (options.urlSafe) {
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regex = options.padding ? base64UrlWithPadding : base64UrlWithoutPadding;
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} else {
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regex = options.padding ? base64WithPadding : base64WithoutPadding;
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}
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return (!options.padding || str.length % 4 === 0) && regex.test(str);
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}
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