Code splitting is a technique used in large JavaScript applications to divide the application's code into smaller, more manageable chunks or bundles. Instead of delivering a single, massive JavaScript file to the browser, code splitting allows you to load only the code that is necessary for the user's initial experience or for specific features they are currently using. This significantly improves the application's initial load time, reduces the amount of data the browser needs to download, and enhances the overall user experience.
The primary purpose of code splitting is to optimize performance, especially for Single Page Applications (SPAs) or large websites with complex functionality. When a user initially visits a website, they don't necessarily need all of the application's code loaded at once. By splitting the code, you can prioritize the loading of essential parts of the application and defer the loading of less critical or rarely used features until they are actually needed.
Benefits of code splitting:
Reduced initial load time: By loading only the code required for the initial view, you reduce the amount of JavaScript the browser needs to download and parse, resulting in a faster initial page load.
Improved Time to Interactive (TTI): TTI is a metric that measures how long it takes for a page to become fully interactive and responsive to user input. Code splitting reduces TTI by allowing the browser to quickly load and execute the code needed for core functionality.
Better user experience: A faster loading and more responsive application leads to a better user experience, especially fo....
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