25 lines
719 B
JavaScript
25 lines
719 B
JavaScript
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'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = isBase64;
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var _assertString = require('./util/assertString');
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var _assertString2 = _interopRequireDefault(_assertString);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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var notBase64 = /[^A-Z0-9+\/=]/i;
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function isBase64(str) {
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(0, _assertString2.default)(str);
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var len = str.length;
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if (!len || len % 4 !== 0 || notBase64.test(str)) {
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return false;
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}
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var firstPaddingChar = str.indexOf('=');
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return firstPaddingChar === -1 || firstPaddingChar === len - 1 || firstPaddingChar === len - 2 && str[len - 1] === '=';
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}
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module.exports = exports['default'];
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