Featured Chapter
Third Parties
The open web is vast, linkable, and interoperable by design. The ability to grab someone else’s complex library and use it on your site with a single
or
element has supercharged developers’ productivity and enabled awesome new web experiences; on the flip side, the immense popularity of a select few third-party providers raises important performance and privacy concerns. This chapter examines the prevalence and impact of third-party code on the web in 2019, the web usage patterns that lead to the popularity of third-party solutions, and potential repercussions for the future of web performance and privacy.