Tree Shaking And Optimization

Tree shaking is a JavaScript technique, specifically used for bundling and code optimization with tools such as Webpack or Rollup. Its purpose is to remove dead code or unused modules from the final bundled JavaScript file, resulting in a smaller file size and improved web application performance

The term "tree shaking" originated from the idea of shaking a tree to eliminate dead leaves. In the context of JavaScript, the "tree" pertains to the codebase together with its dependencies, while "shaking" entails getting rid of unnecessary components.

Dead Code: Non-functional code found in the application's source code but never executed.

How tree shaking typically works;

Module System: JavaScript code is frequently structured into modules, with each one having the capability to export functions, classes, or variables.

Static Analysis: As part of the build process, tools analyze the code and its dependencies to identify which components are utilized.

Dead Code Elimination: Unused code is identified and removed from the final product. This includes functions, variables, or entire modules that are not referenced.

Improved Output: The JavaScript file is generated without extraneous code, resulting in a smaller file size.

Tree shaking is especially advantageous for significant projects that require only a particular portion of the code for a specific function or page. Removing unused code enables developers to create more efficient and speedier web applications.