@waiting/base64/dist/lib/index.js

Base64 encoding/decoding in pure JS on both modern Browsers and Node.js. Also supports URL-safe base64

import { browserDecode, browserEncode, fromBuffer as browserFromBuffer, } from './browser'
import { defaultConfig } from './config'
import { b64toURLSafe, b64PadSuffix, isRunningInNodejs } from './helper'
import { fromBuffer as nodeFromBuffer, nodeDecode, nodeEncode, } from './nodejs'
import { getLens, _byteLength } from './to_buffer'
/** Encode to base64, source from string | number | bigint */
export function b64encode(input, textEncoder) {
    const ret = isRunningInNodejs() && !defaultConfig.forceBrowser
        ? nodeEncode(input)
        : browserEncode(input, textEncoder)

    return ret
}
/** Decode base64 to string */
export function b64decode(base64, outputEncoding = 'utf-8', textDecoder) {
    const ret = isRunningInNodejs() && !defaultConfig.forceBrowser
        ? nodeDecode(base64, outputEncoding)
        : browserDecode(base64, outputEncoding, textDecoder)

    return ret
}
/** Encode to base64, source from ArrayBuffer or Uint8Array */
export function b64fromBuffer(buffer) {
    const ret = isRunningInNodejs() && !defaultConfig.forceBrowser
        ? nodeFromBuffer(buffer)
        : browserFromBuffer(buffer)

    return ret
}
/**
 * Calculate buffer.byteLength from base64
 *
 * base64 is 4/3 + up to two characters of the original data
 */
export function b64byteLength(base64) {
    const lens = getLens(base64)
    const validLen = lens[0]
    const placeHoldersLen = lens[1]

    return _byteLength(validLen, placeHoldersLen)
}
/**
 * Encode to URL-safe base64, source from string | number | bigint.
 * Replace "+" to "-" and "/" to "_", and Remove "=".
 *
 * Note: using b64toURLSafe() for converting base64 string to URL-safe base64 string
 *
 * @see https://en.wikipedia.org/wiki/Base64#URL_applications
 */
export function b64urlEncode(input, textEncoder) {
    const b64 = b64encode(input, textEncoder)

    return b64toURLSafe(b64)
}
/**
 * Encode to URL-safe base64, source from ArrayBuffer or Uint8Array
 *
 * @see https://en.wikipedia.org/wiki/Base64#URL_applications
 */
export function b64urlFromBuffer(buffer) {
    const b64 = b64fromBuffer(buffer)

    return b64toURLSafe(b64)
}
/**
 * Decode URL-safe base64 to original string.
 *
 * Note: using b64fromURLSafe() for converting URL-safe base64 string to base64 string
 *
 * @see https://en.wikipedia.org/wiki/Base64#URL_applications
 */
export function b64urlDecode(input, outputEncoding = 'utf-8', textDecoder) {
    const str = b64PadSuffix(input) // for URL-safe

    return b64decode(str, outputEncoding, textDecoder)
}