@skhemata/skhemata-form
Version:
Skhemata Form Web Component. This web component can be used as base web component when working with forms and inputs.
23 lines • 741 B
JavaScript
import assertString from './util/assertString';
import merge from './util/merge';
const notBase64 = /[^A-Z0-9+\/=]/i;
const urlSafeBase64 = /^[A-Z0-9_\-]*$/i;
const defaultBase64Options = {
urlSafe: false,
};
export default function isBase64(str, options) {
assertString(str);
options = merge(options, defaultBase64Options);
const len = str.length;
if (options.urlSafe) {
return urlSafeBase64.test(str);
}
if (len % 4 !== 0 || notBase64.test(str)) {
return false;
}
const firstPaddingChar = str.indexOf('=');
return firstPaddingChar === -1 ||
firstPaddingChar === len - 1 ||
(firstPaddingChar === len - 2 && str[len - 1] === '=');
}
//# sourceMappingURL=isBase64.js.map