javascript / intermediate
Snippet
Encapsulation with Private Class Fields
Using the '#' prefix before a property name makes it truly private to the class. It cannot be accessed or modified from outside the class instance, ensuring strict encapsulation.
snippet.js
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class SecureVault {#secretCode;constructor(code) {this.#secretCode = code;}verify(input) {return this.#secretCode === input;}}const vault = new SecureVault('1234');console.log(vault.verify('1234')); // true// console.log(vault.#secretCode); // SyntaxError
nodejs
Breakdown
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#secretCode;
Declares a private field that is inaccessible outside the class scope.
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this.#secretCode = code;
Assigns a value to the private field within the constructor.