This course has been updated! We now recommend you take the JavaScript Performance course.

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The "Lazy Loading" Lesson is part of the full, Website Performance course featured in this preview video. Here's what you'd learn in this lesson:

Lazy loading is often referred to as on-demand loading or post loading. This technique waits until it’s absolutely sure the resource is needed. Lazy loading is on the other end of the spectrum from preloading but both methods are in a developer’s arsenal of tools for performance tuning. A simple coded example of a JavaScript file being lazy loaded on a web page.

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