Polyfill is a service which accepts a request for a set of browser features and returns only the polyfills that are needed by the requesting browser.
Polyfill.io is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.
In terms of market share, Ext JS is clearly lagging behind, losing to Polyfill.io in all segments.
Polyfill.io has better usage coverage in more websites categories. Including Computers Electronics & Technology, Lifestyle, Food & Drink, Science & Education and 20 other categories.
Ext JS hasn't got a lead over Polyfill.io in any websites category.
Polyfill.io is leading in most countries, including United States, United Kingdom, Canada, Japan and 160 other countries.
Ext JS is leading in Haiti and Turkmenistan.