Objects & Immutability
Deep Merge Objects
mediumJS SpecificJS / TS3 tests
Problem Statement
Implement `deepMerge(target, source)`, recursively merging properties of `source` into a new copy of `target` without mutating either input object. Array properties should concatenate or replace, and object properties should recursively merge.
Examples
Example 1:
const a = { user: { name: 'Alice', age: 25 } };
const b = { user: { age: 26, role: 'admin' } };
deepMerge(a, b); // { user: { name: 'Alice', age: 26, role: 'admin' } }JavaScript & TypeScript starter code included
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