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41 lines
1.0 KiB
41 lines
1.0 KiB
4 years ago
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(function(root) {
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'use strict';
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function isBase64(v, opts) {
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if (v instanceof Boolean || typeof v === 'boolean') {
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return false
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}
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if (!(opts instanceof Object)) {
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opts = {}
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}
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if (opts.hasOwnProperty('allowBlank') && !opts.allowBlank && v === '') {
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return false
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}
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var regex = '(?:[A-Za-z0-9+\\/]{4})*(?:[A-Za-z0-9+\\/]{2}==|[A-Za-z0-9+\/]{3}=)?';
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if (opts.mime) {
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regex = '(data:\\w+\\/[a-zA-Z\\+\\-\\.]+;base64,)?' + regex
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}
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if (opts.paddingRequired === false) {
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regex = '(?:[A-Za-z0-9+\\/]{4})*(?:[A-Za-z0-9+\\/]{2}(==)?|[A-Za-z0-9+\\/]{3}=?)?'
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}
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return (new RegExp('^' + regex + '$', 'gi')).test(v);
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}
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if (typeof exports !== 'undefined') {
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if (typeof module !== 'undefined' && module.exports) {
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exports = module.exports = isBase64;
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}
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exports.isBase64 = isBase64;
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} else if (typeof define === 'function' && define.amd) {
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define([], function() {
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return isBase64;
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});
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} else {
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root.isBase64 = isBase64;
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}
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})(this);
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