Jan 17, 2025 20:00:00

The 2024 results of the 'Interop' project to reduce differences in specifications between browsers will be announced

In addition to Google Chrome, there are other browsers that we use to view websites, such as Firefox and Safari. The results of the 2024 Interop compatibility improvement project, which aims to achieve a state where 'sites are displayed the same regardless of the browser you use,' have been announced on the official

WebKit blog.

The success of Interop 2024! | WebKit
https://webkit.org/blog/16413/the-success-of-interop-2024/

Every year, Interop selects several dozen areas as 'focus areas' to work on improving, and at the end of the year posts a review of the improvements made that year. The results for 2023 are as follows:

What is the 'Interop' project that improves web browser interoperability? - GIGAZINE

For 2024, 17 areas of focus have been set: 'Accessibility,' 'CSS nesting,' 'Custom properties,' 'Declarative Shadow DOM,' 'font-size-adjust,' 'HTTPS URLs in WebSockets,' 'IndexedDB,' 'Layout,' 'Pointer and mouse events,' 'Popover,' 'Relative color syntax,' 'requestVideoFrameCallback,' ' Scrollbar styling,' '@starting-style and transition-behavior,' 'Text direction,' and 'text-wrap: balance.'

Tests will be prepared for the items set in the priority areas, and the 'interoperability score' of each browser will be measured from time to time. The interoperability score at the beginning of 2024 was 46%, but by the end of 2024 it had reached 95%.

The interoperability scores for the Interop project and its predecessor, the Compat project, as of the end of the year are as follows. The score of 95% in 2024 was the highest ever.

Just because it's 2025 doesn't mean the standardization work will end, and at the time of writing, the preview versions of Chrome, Edge, Firefox, and Safari all have scores of 99%.

The 2025 Interop project is still in the planning stages at the time of writing.