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is-base64
Advanced tools
Readme
Predicate that returns true if base64 string.
npm install is-base64
var isBase64 = require('is-base64');
var string = 'iVBORw0KGgoAAAAN ... kSuQmCC';
var stringWithMime = 'data:image/png;base64,iVBORw0KGgoAAAA ... AAElFTkSuQmCC';
console.log(isBase64(string)); // true
console.log(isBase64(stringWithMime)); // false
console.log(isBase64(stringWithMime, {allowMime: true})); // true
console.log(isBase64(string, {mimeRequired: true})); // false
console.log(isBase64(stringWithMime, {mimeRequired: true})); // true
console.log(isBase64('1342234')); // false
console.log(isBase64('afQ$%rfew')); // false
console.log(isBase64('dfasdfr342')); // false
console.log(isBase64('uuLMhh==')); // true
console.log(isBase64('uuLMhh')); // false
console.log(isBase64('uuLMhh', {paddingRequired: false})); // true
console.log(isBase64('')); // true
console.log(isBase64('', {allowEmpty: false})); // false
{string} string - string to check if is valid base64 string
{object} [options]
Install CLI:
npm install -g is-base64
CLI example:
$ is-base64 aGVsbG8gd29ybGQ=
true
Piping example:
$ echo aGVsbG8gd29ybGQ= | is-base64
true
Q: Why is empty string ""
a valid base64 string by default?
A: According to RFC 4648 Section 10, the following is valid test vector:
BASE64("") = ""
MIT
FAQs
Predicate that returns true if base64 string.
The npm package is-base64 receives a total of 299,800 weekly downloads. As such, is-base64 popularity was classified as popular.
We found that is-base64 demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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