Polyfill is a technology that provides modern functionality to older, less advanced web browsers or environments, ensuring consistent and efficient user experience. Essentially, it is a fallback mechanism designed to fill in the gaps in browser compatibility by mimicking the API features of recent web standards. By using JavaScript code libraries or plugins, Polyfill identifies the browser's incapabilities and adapts accordingly, essentially "polyfilling" missing features. This technique enables developers to leverage the latest technologies without alienating users of older browsers, maintaining support, and ensuring a seamless integration of innovative web features.
9,156,026
websites using Polyfill
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Websites using Polyfill by countrymarket share · top 8 countries
🇺🇸United States
🇩🇪Germany
🇬🇧United Kingdom
🇫🇷France
🇳🇱Netherlands
🇮🇹Italy
🇨🇦Canada
🇦🇺Australia
0%2.5%5%7.5%10%
Websites using Polyfill by industrydetected industries
Technology & Computing21%
Education18%
Construction16%
Medical & Healthcare15%
Shopping15%
Marketing & Advertising14%
Websites using Polyfill
showing 25 of 9,156,026| Website | Country | Industry | Emails | Title / Description | Socials |
|---|---|---|---|---|---|
| 🇺🇸United States | Business & Finance | acho85@bloomberg.com+100 | Bloomberg - Business News, Stock Markets, Finance, Breaking & World News Bloomberg delivers business and markets news, data, analysis, and video to the world, featuring stories from Businessweek and Bloomberg News |     | |
| 🇩🇰Denmark | Technology & Computing | accounting@trustpilot.com+32 | Trustpilot Reviews: Experience the power of customer reviews We're all about consumer reviews. Get the real inside story from shoppers like you. Read, write and share reviews on Trustpilot today. |  | |
| 🇺🇸United States | Entertainment | 3cjreeves@imdb.com+102 | IMDb: Ratings, Reviews, and Where to Watch the Best Movies & TV Shows IMDb is the world's most popular and authoritative source for movie, TV and celebrity content. Find ratings and reviews for the newest movie and TV shows. Get personalized recommendations, and learn where to watch across hundreds of streaming providers. |  | |
| - | - | 31fdbad5c45cd1e26be9ff37be321b8586b80fee.1624355507.git.gumingtao@xiaomi.com+210 | Xiaomi United States | Xiaomi Official Website Xiaomi, a global company producing quality products at honest pricing. | | |
| 🇬🇧United Kingdom | Print & Publishing | 3cbarry.glendenning@theguardian.com+419 | Latest news, sport and opinion from the Guardian Latest US news, world news, sports, business, opinion, analysis and reviews from the Guardian, the world's leading liberal voice | | |
| 🇨🇳China | Software Development | admin@bilibili.com+32 | 哔哩哔哩 (゜-゜)つロ 干杯~-bilibili 哔哩哔哩（bilibili.com)是国内知名的视频弹幕网站，这里有及时的动漫新番，活跃的ACG氛围，有创意的Up主。大家可以在这里找到许多欢乐。 | - | |
| 🇬🇧United Kingdom | Movies & TV | 30animals@bbc.com+180 | BBC Home - Breaking News, World News, US News, Sports, Business, Innovation, Climate, Culture, Travel, Video & Audio Visit BBC for trusted reporting on the latest world and US news, sports, business, climate, innovation, culture and much more. | - | |
| 🇱🇹Lithuania | Technology & Computing | 4beta@oxylabs.io+15 | - | | |
| 🇷🇺Russian Federation | Software Development | 3asupport@crpt.ru+64 | - | - | |
| 🇷🇺Russian Federation | Technology & Computing | abuse@netangels.ru+6 | - | - | |
| - | Science | ads@researchgate.net+21 | - | - | |
| 🇺🇸United States | Software Development | 1cutiepatootie@etsy.com+266 | - | - | |
| 🇮🇳India | Marketing & Advertising | abhinav.kejriwal@inmobi.com+64 | - | - | |
| 🇺🇸United States | Shopping | a.appleton@walmart.com+1108 | Walmart | Save Money. Live better. Shop Walmart.com today for Every Day Low Prices. Join Walmart+ for unlimited free delivery from your store & free shipping with no order minimum. Start your free 30-day trial now! | - | |
| 🇺🇸United States | Environment & Sustainability | 16.82-instructors@mit.edu+14788 | - | | |
| 🇺🇸United States | Software Development | advertisersupport@doubleverify.com+62 | Home - DoubleVerify DoubleVerify is driven by a mission – to make the digital advertising ecosystem stronger, safer and more secure. | | |
| 🇺🇸United States | Science | accommodation@openai.com+151 | - | | |
| 🇺🇸United States | Education | abuse@duolingo.com+37 | Duolingo Duolingo is the world's most popular way to learn a language. It's 100% free, fun and science-based. Practice online on duolingo.com or on the apps! | - | |
| 🇺🇸United States | Software Development | beta-feedback@docker.com+51 | - | | |
| 🇵🇰Pakistan | Staffing & Recruitment | - | - | - | |
| 🇺🇸United States | Software Development | abbie.kouzmanoff@amplitude.com+99 | Amplitude | Product Analytics & Event Tracking Platform | Amplitude Build better products by turning your user data into meaningful insights, using Amplitude's digital analytics platform and experimentation tools. | | |
| 🇺🇸United States | Cybersecurity | adam_scheblein@mcafee.com+149 | - | | |
| 🇫🇮Finland | Gaming | bethebuilder@supercell.com+38 | Supercell Visit Supercell.com and find out more about us and our games. | - | |
| 🇺🇸United States | Software Development | abuse@duckduckgo.com+28 | DuckDuckGo - Protection. Privacy. Peace of mind. The Internet privacy company that empowers you to seamlessly take control of your personal information online, without any tradeoffs. | - | |
| 🇺🇸United States | Software Development | aws_mp_orders@launchdarkly.com+14 | Runtime Control for AI-Era Software | Feature Flags & AI Agent Control | LaunchDarkly LaunchDarkly helps teams safely manage code and AI agents in production with feature flags, progressive delivery, automated rollback, and runtime control. | |
Showing 25 of 9,156,026 websitesGet the full list →
Frequently asked
What is a Polyfill?›
A Polyfill is a piece of code that is used to provide modern functionality on older browsers that do not natively support it. It bridges the gap, allowing developers to use newer web features while maintaining backward compatibility with older browsers.
When should I use a Polyfill in my project?›
You should use a Polyfill in your project when you want to ensure that your web application works seamlessly across different browsers and versions, especially when making use of modern web features that are not supported by older browsers.
Can Polyfills cause performance issues in a web application?›
Although Polyfills help provide compatibility with older browsers, they can sometimes cause performance issues. Since they are essentially JavaScript code running in the browser, using a large number of Polyfills or large-sized Polyfills may slow down your application. To mitigate this, it's recommended to use only the necessary Polyfills and to load them conditionally, based on the user's browser.
How are Polyfills different from Shims?›
Both Polyfills and Shims serve the purpose of providing compatibility with older browsers, but they do so in slightly different ways. A Polyfill is used to replicate an entire API or functionality that is missing in the older browser, while a Shim typically modifies an existing API, often working around browser inconsistency or providing partial functionality of a missing API.
Are there any popular libraries that provide Polyfills?›
Yes, there are several popular libraries that provide Polyfills, such as core-js, polyfill.io, and Modernizr. These libraries detect browser support and only load the required Polyfills, making it easier to manage compatibility issues in your web applications.
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