javascript / intermediate
Snippet
Private Class Fields and Methods
Private class fields (starting with #) ensure that internal data and methods cannot be accessed or modified from outside the class instance, providing true encapsulation.
snippet.js
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class SecureVault {#secretKey;constructor(key) {this.#secretKey = key;}#hashKey() {return `hash_${this.#secretKey}`;}getAccess() {return this.#hashKey();}}const vault = new SecureVault('12345');console.log(vault.getAccess()); // Works// console.log(vault.#secretKey); // SyntaxError
Breakdown
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#secretKey;
Declares a private field that is inaccessible outside the class.
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#hashKey() { ... }
Defines a private method that can only be called by other methods within the same class.