Video: https://youtu.be/bl9wJH1fBjw

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Lazy-loading is a technique that defers the loading of non-critical resources at page load time. Instead, these non-critical resources are loaded at the moment of need.

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Chapters:

0:00 Intro

0:36 What is lazy loading

0:58 Lazy loading in simple words

4:02 What are critical resources

4:25 Different loading strategies

5:48 What should you lazy load

6:56 Real-world example

7:43 Outro