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Posts tagged #JAVASCRIPT
6 posts filed under this topic.
Streaming data in Next.js using API route
Learn how to stream data in Next.js using the TransformStream API and server-sent events for real-time data updates.
JavaScript's Defaults: || vs. ??
Understanding the difference between Logical OR (||) and Nullish Coalescing (??) operators in JavaScript for setting default values.
How to mock express middleware in Jest
Learn how to mock Express middleware functions in Jest tests using jest.mock.
Mocking modules in Jest.js
Complete guide to mocking modules in Jest for both CommonJS and ES Module syntax, including named imports, default exports, and partial mocks.
Avoid bugs when using Array fill()
Array.fill in JavaScript passes objects by reference, not by value. Learn how to avoid common bugs when using this method.