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46 lines
1.2 KiB
46 lines
1.2 KiB
4 years ago
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# is-base64
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> Predicate that returns true if base64 string.
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# Install
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```bash
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npm install is-base64
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```
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# Usage
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```javascript
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var isBase64 = require('is-base64');
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var string = 'iVBORw0KGgoAAAAN ... kSuQmCC';
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var stringWithMime = 'data:image/png;base64,iVBORw0KGgoAAAA ... AAElFTkSuQmCC';
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console.log(isBase64(string)); // true
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console.log(isBase64(stringWithMime)); // false
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console.log(isBase64(stringWithMime, {mime: true})); // true
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console.log(isBase64('1342234')); // false
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console.log(isBase64('afQ$%rfew')); // false
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console.log(isBase64('dfasdfr342')); // false
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console.log(isBase64('uuLMhh==')); // true
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console.log(isBase64('uuLMhh')); // false
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console.log(isBase64('uuLMhh', {paddingRequired: false})); // true
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console.log(isBase64('')); // true
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console.log(isBase64('', {allowBlank: false})); // false
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```
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# API
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## isBase64(string, options)
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- {string} string - string to check if is valid base64 string
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- {object} [options]
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- [options.paddingRequired=true] {boolean} - check for padding
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- [options.mime=false] {boolean} - returns true for valid strings with mime
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- [options.allowBlank=true] {boolean} - returns true for empty string
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# License
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MIT
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