@firebase/util

Encoding and Decoding Base64

This feature allows you to encode and decode strings to and from Base64. It's useful for encoding data that needs to be safely transmitted over a network.

"use strict";
const { base64Encode, base64Decode } = require('@firebase/util');

const encoded = base64Encode('Firebase');
console.log(encoded); // Output: RmlyZWJhc2U=

const decoded = base64Decode(encoded);
console.log(decoded); // Output: Firebase

Deep Merge Objects

This feature provides functions to deeply copy and merge JavaScript objects. It's particularly useful when you need to combine settings or configurations.

"use strict";
const { deepCopy, deepExtend } = require('@firebase/util');

const obj1 = { a: 1, b: { c: 2 } };
const obj2 = { b: { d: 3 }, e: 4 };

const merged = deepExtend(obj1, obj2);
console.log(merged); // Output: { a: 1, b: { c: 2, d: 3 }, e: 4 }

URL Manipulation

This feature allows you to easily construct query strings from objects, which is useful for creating URLs with parameters.

"use strict";
const { querystring } = require('@firebase/util');

const queryString = querystring({ a: 1, b: 'Firebase' });
console.log(queryString); // Output: ?a=1&b=Firebase