Why Performance Matters, Part 3: Tolerance Managementhttps://www.smashingmagazine.com/2015/12/performance-matters-part-3-tolerance-management/
Gradual content loadinghttps://www.youtube.com/watch?v=EbbjEY-TyhU&feature=youtu.be&t=4136
Brief insights on perceived performance and skeleton screens from Mobile Apps Trends talk from Conversions@Google 2018.
Everything you need to know about skeleton screenshttps://uxdesign.cc/what-you-should-know-about-skeleton-screens-a820c45a571a
How do humans perceive skeleton screens? Which animation will make load time seem shorter? This research can help answer some of the questions.
Patterns and Purpose (an Excerpt from Animation at Work book)https://alistapart.com/article/patterns-and-purpose/
Transitional, supplemental, feedback, demonstrative and decorative. Learn about these different animation types and problems they solve. With some good examples of course.
Animations (Google's Web Fundamentals Guides)https://developers.google.com/web/fundamentals/design-and-ux/animations
Designing a beautiful animation that serves a good purpose is just the start. Implementing animations correctly helps achieve that "just right" feeling.