Hoisting

Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their respective scopes during compilation. This means that regardless of where variables and functions are declared in the code, they are treated as if they are declared at the beginning of their scope, allowing them to be referenced before they are actually declared in the source code.

How to use it in a sentence

  1. During the code review, the senior developer pointed out that the junior developer's bug was caused by not understanding hoisting, as the variable was being referenced before it was declared in the function.

  2. The tech lead, who recently read a blog post on Medium about the latest JavaScript trends, mentioned that hoisting is a behavior that often confuses developers coming from other programming languages.

If you actually want to learn more...

  • JavaScript Hoisting Explained: This article provides a detailed explanation of hoisting in JavaScript, including variable and function hoisting, and how it affects code execution.

  • Hoisting in Modern JavaScript: This blog post covers hoisting in modern JavaScript, explaining the differences between var, let, and const declarations and their hoisting behaviors.

  • Hoisting and Temporal Dead Zones in ES6: This Hackernoon article dives into hoisting and temporal dead zones in ECMAScript 6 (ES6), providing a deeper understanding of these concepts in the context of modern JavaScript.

Note: the Developer Dictionary is in Beta. Please direct feedback to skye@statsig.com.

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