javascript / intermediate
Snippet
Encapsulating Data with Private Class Fields
Private class fields (using the # prefix) ensure that sensitive data or internal methods cannot be accessed or modified from outside the class.
snippet.js
javascript
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class ApiClient {#apiKey;constructor(key) {this.#apiKey = key;}#logRequest(endpoint) {console.log(`Requesting ${endpoint}`);}async fetch(endpoint) {this.#logRequest(endpoint);return fetch(endpoint, { headers: { Authorization: this.#apiKey } });}}
nextjs
Breakdown
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#apiKey;
Declares a private property that is inaccessible outside the class scope.
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#logRequest(endpoint) {
Defines a private method for internal class use only.