kaguranana-birthday-project/node_modules/nanoid/index.dev.js
2021-12-12 18:49:32 -08:00

63 lines
1.9 KiB
JavaScript
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

import { urlAlphabet } from './url-alphabet/index.js'
if (true) {
if (
typeof navigator !== 'undefined' &&
navigator.product === 'ReactNative' &&
typeof crypto === 'undefined'
) {
throw new Error(
'React Native does not have a built-in secure random generator. ' +
'If you dont need unpredictable IDs use `nanoid/non-secure`. ' +
'For secure IDs, import `react-native-get-random-values` ' +
'before Nano ID.'
)
}
if (typeof msCrypto !== 'undefined' && typeof crypto === 'undefined') {
throw new Error(
'Import file with `if (!window.crypto) window.crypto = window.msCrypto`' +
' before importing Nano ID to fix IE 11 support'
)
}
if (typeof crypto === 'undefined') {
throw new Error(
'Your browser does not have secure random generator. ' +
'If you dont need unpredictable IDs, you can use nanoid/non-secure.'
)
}
}
let random = bytes => crypto.getRandomValues(new Uint8Array(bytes))
let customRandom = (alphabet, size, getRandom) => {
let mask = (2 << (Math.log(alphabet.length - 1) / Math.LN2)) - 1
let step = -~((1.6 * mask * size) / alphabet.length)
return () => {
let id = ''
while (true) {
let bytes = getRandom(step)
let j = step
while (j--) {
id += alphabet[bytes[j] & mask] || ''
if (id.length === size) return id
}
}
}
}
let customAlphabet = (alphabet, size) => customRandom(alphabet, size, random)
let nanoid = (size = 21) => {
let id = ''
let bytes = crypto.getRandomValues(new Uint8Array(size))
while (size--) {
let byte = bytes[size] & 63
if (byte < 36) {
id += byte.toString(36)
} else if (byte < 62) {
id += (byte - 26).toString(36).toUpperCase()
} else if (byte < 63) {
id += '_'
} else {
id += '-'
}
}
return id
}
export { nanoid, customAlphabet, customRandom, urlAlphabet, random }