Report: State of JavaScript
JavaScript powers the modern web, enabling rich and interactive web applications. In this report we dive into how JavaScript is used on the web, and its adoption and trends both for mobile and desktop experiences.
JavaScript Bytes
The sum of transfer size kilobytes of all external scripts requested by the page. An external script is identified as a resource with the js or json file extensions or a MIME type containing script or json.
See also: Page Weight
JavaScript Requests
The number of external scripts requested by the page. An external script is identified as a resource with the js or json file extensions or a MIME type containing script or json.
See also: Page Weight
JavaScript Boot-up Time
The amount of CPU time each script consumes per page. This metric comes from Lighthouse.
See also: Loading Speed