JavaScript · Object Methods · Interactive

Object methods,
every one explained

Object.keys, assign, freeze, create, structuredClone — all 30+ static and instance methods explained with real data transformation scenarios.

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const user = { name: 'Mankal', age: 24, role: 'dev' };

// Inspect
Object.keys(user);    // ['name','age','role']
Object.values(user);  // ['Mankal',24,'dev']
Object.entries(user); // [['name','Mankal'],...]

// Transform — apply discount to all prices
Object.fromEntries(
  Object.entries(prices)
    .map(([k,v]) => [k, v * 0.9])
);

// Protect — immutable config
const CFG = Object.freeze({ apiUrl: '...' });

// Deep clone
const clone = structuredClone(user);