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 |
|---|---|---|---|---|---|
| 🇧🇪Belgium | Education | follow@youtu.be+6 | YouTube Share your videos with friends, family, and the world | - | |
| 🇺🇸United States | Entertainment | 22security-report@netflix.com+348 | Netflix - Watch TV Shows Online, Watch Movies Online Watch Netflix movies & TV shows online or stream right to your smart TV, game console, PC, Mac, mobile, tablet and more. | - | |
| 🇺🇸United States | Software Development | accommodations@sentry.io+44 | Application Performance Monitoring & Error Tracking Software | Sentry Application performance monitoring for developers & software teams to see errors clearer, solve issues faster & continue learning continuously. Get started at sentry.io. |   | |
| 🇳🇴Norway | Software Development | a0alejandrov@opera.com+168 | - |   | |
| - | Technology & Computing | - | 腾讯网 腾讯网从2003年创立至今，已经成为集新闻信息，区域垂直生活服务、社会化媒体资讯和产品为一体的互联网媒体平台。腾讯网下设新闻、科技、财经、娱乐、体育、汽车、时尚等多个频道，充分满足用户对不同类型资讯的需求。同时专注不同领域内容，打造精品栏目，并顺应技术发展趋势，推出网络直播等创新形式，改变了用户获取资讯的方式和习惯。 | - | |
| 🇺🇸United States | Software Development | 1es-lighthouse-eng@microsoft.com+6854 | Microsoft – AI, Cloud, Productivity, Computing, Gaming & Apps Explore Microsoft products and services and support for your home or business. Shop Microsoft 365, Copilot, Teams, Xbox, Windows, Azure, Surface and more. |  | |
| 🇺🇸United States | Cybersecurity | 22cna@cloudflare.com+340 | - | | |
| - | Hardware & Electronics | 22mobile.security@samsung.com+3144 | Samsung US | Mobile | TV | Home Electronics | Home Appliances | Samsung US Discover the latest in electronic & smart appliance technology with Samsung. Find the next big thing from smartphones & tablets to laptops & tvs & more. | | |
| - | Hardware & Electronics | 22product-security@apple.com+2150 | Apple | - | |
| 🇺🇸United States | Entertainment | 61tims@tiktok.com+209 | TikTok - Make Your Day | - | |
| 🇺🇸United States | Technology & Computing | - | Yahoo | Mail, Weather, Search, Politics, News, Finance, Sports & Videos Latest news coverage, email, free stock quotes, live scores and video are just the beginning. Discover more every day at Yahoo! |  | |
| 🇺🇸United States | Software Development | acarreras@pinterest.com+139 | Pinterest Discover recipes, home ideas, style inspiration and other ideas to try. | - | |
| 🇺🇸United States | Software Development | 1security-advisories@github.com+850 | GitHub · Build and ship software on a single, collaborative platform · GitHub GitHub is where people build software. More than 150 million people use GitHub to discover, fork, and contribute to over 420 million projects. | | |
| - | Marketing & Advertising | 1mburkhar@adobe.com+1572 | Adobe: Creative, marketing and document management solutions Adobe is changing the world through digital experiences. We help our customers create, deliver and optimize content and applications. | - | |
| 🇧🇩Bangladesh | Marketing & Advertising | 33enthrall@youtube.com+4756 | YouTube Share your videos with friends, family, and the world | - | |
| 🇺🇸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 | - | - |
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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