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HenriqueSilverio/JavaScript-Read-Only-Property.js

Created August 14, 2025 00:24
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Read Only property in 'vanilla' JavaScript.
Raw
JavaScript-Read-Only-Property.js
class BankAccount {
constructor(accountNumber) {
Object.defineProperty(this, 'accountNumber', { value: accountNumber })
}
}
const account = new BankAccount('987-654-321')
// 987-654-321
console.log(account.accountNumber)
// TypeError: Cannot assign to read only property
account.accountNumber = 'invalid'
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