Web Depot: Boost Perceived Page Speeds

Stephen Yagielowicz

Everyone wants a fast loading website, especially mobile users and others with slower connections — with “lazy loading” a way to make a site seem faster. According to its author, Michael Cavalea, Layzr.js is a small, fast, modern and dependency-free lazy loading library.

“Lazy loading boosts page speed by deferring the loading of images until they’re in (or near) the viewport. This library makes it completely painless — maximizing speed by keeping options to a minimum,” Cavalea explains. “The scroll event has been debounced to minimize the weight on the browser, and images are revealed [with] optimal rendering.”

Each image requires a placeholder in its SRC attribute, plus a URL for a regular and a Retina image, while a variable threshold rate adjustments to the speed at which images load. A callback function is invoked each time an image is loaded, enabling Layzr.js to be easily extended.

Related:  

More Articles

opinion

Is Stale Blog Content Hurting Your SEO?

Adrian DeGus ·
opinion

Digital Advertising Really Isn’t Advertising

Juicy Jay ·
opinion

Will Your Business Need a Data Protection Officer?

Chad Anderson ·
profile

WIA Profile: Maxine Lynn

Women In Adult ·
profile

Q&A: ExoClick CEO Benjamin Fonzé on Ad Network Conquest

Alejandro Freixes ·
opinion

It’s Time for FSC to Set the Terms of Debates

Eric Paul Leue ·
educational

A Legal Primer to Help Develop Explicit Brands Previously Off Limits

Lawrence G. Walters ·
opinion

Preventing Data Breaches Staves Off Big Legal Claims

Chad Anderson ·
Show More