Polyfill

Polyfill is used by 1.12% of sites

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A polyfill, also known as a polyfiller, is a piece of code or a JavaScript library that provides a browser with functionality that is not natively supported. It allows developers to use new features or APIs in older browsers that do not have built-in support for those features.

The term "polyfill" is derived from the words "poly" (meaning "many") and "fill" (meaning to "fill the gaps"). Polyfills fill the gaps in browser support by replicating the functionality of newer features using JavaScript code.

The main purpose of a polyfill is to ensure backward compatibility, allowing developers to write code using modern standards and APIs while ensuring that it works in older browsers. Polyfills typically detect whether a specific feature is supported by the browser and, if not, provide a fallback implementation.

Here are a few key points about polyfills:

Feature Detection: Polyfills typically use feature detection techniques to determine if a particular feature is supported by the browser. They check for the existence of specific methods, objects, or properties associated with the feature before applying the polyfill.

Conditional Loading: Polyfills can be conditionally loaded based on whether the browser needs them. Modern JavaScript bundlers and build tools provide mechanisms to load polyfills only when necessary, minimizing unnecessary code execution.

Customizability: Polyfills can be customized and tailored to specific requirements. Developers can choose which polyfills to include based on the targeted browser support or specific features required by their application.

Performance Considerations: While polyfills enable the use of modern features in older browsers, they come with a performance overhead. Polyfills add extra code that needs to be downloaded and executed by the browser, potentially impacting page load times and runtime performance.

Feature Completeness: Polyfills may not always provide a complete implementation of a feature or API. They often focus on the most commonly used parts and may have limitations or subtle differences compared to the native implementation in modern browsers. It is essential to review the documentation and limitations of each polyfill to ensure it meets the specific requirements of the project.

Polyfills have been widely adopted as a strategy to achieve cross-browser compatibility and leverage modern web technologies while supporting older browsers. Numerous polyfills are available for different features and APIs, and they are commonly used to enable features like HTML5, CSS3, new JavaScript methods, and other browser-specific functionality.

As browsers continue to evolve and add support for new features, the need for certain polyfills may decrease. However, they remain valuable tools for ensuring broad compatibility and bridging the gap between older and newer browser versions.

Top Websites using Polyfill

: Bounce ratePages / VisitVisit duration
101volvocars.com Access Denied Welcome to Volvo Car USA. Explore our new and pre-owned cars, including fully electric, plug-in hybrid, and gas options. See our family SUVs and build your new car today.: 48.99 4.40 02:02
102technocoder.com: n/a 23.50 n/a
103ourcasualcontact.com Ourcasualcontact.com Ourcasualcontact.com: 21.70 26.00 28:05
104onewayshopping.com Shop Compare Prices, Product Reviews, Shop Retail, Online Price Comparison Shopping Website. Shop Compare Prices, Product Reviews, Shop Retail, Online Price Comparison Shopping Website.: n/a 8.20 n/a
105potterybarn.com Home Furniture, Home Decor & Outdoor Furniture | Pottery Barn Shop Pottery Barn and find everything you need to decorate your home. Browse our expertly crafted indoor and outdoor furniture, accessories, decor, and more. Curbside pickup available.: 51.13 0.00 07:34
106werilia.com: n/a 99.99 n/a
107spareroom.co.uk SpareRoom for flatshare, house share, flat share & rooms for rent Find a flatshare or flatmate fast! 1000s of rooms for rent in flatshares across London, Manchester, Birmingham, Bristol, Leeds, Edinburgh, Glasgow and the rest of the UK. Advertise for free! As seen on TV.: 31.14 8.39 14:43
108lifeandtravel.com: n/a 42.00 n/a
109scolarium-onefd.cloudapp.net الفـضاء التعليمي الإلكتروني" المـعـلام" الخاص بالمستوى الثـانـوي: n/a 4.78 n/a
110greenhouse.io Applicant tracking software & hiring platform | Greenhouse More than an applicant tracking software, Greenhouse is a hiring software solution. Hire better with our talent acquisition support and applicantâ¦: 48.13 3.92 09:07
111studentmiles.com: n/a 4.84 n/a
112buzzwize.com BUZZWIZE -: n/a 14.00 n/a
113eonline.com Entertainment News, Celebrity News, Celebrity Gossip Your source for entertainment news, celebrities, celeb news, and celebrity gossip. Check out the hottest fashion, photos, movies and TV shows!: 60.28 1.97 01:31
114clipartfest.com 13 Great Websites for Free Clipart Downloads - Clipart Kind Clipart Kind offers great free clipart websites for you. This list features the 13 best website resources for free-to-use clip art.: n/a 0.00 n/a
115kijijiautos.ca Kijiji Autos - New and Used Cars, Trucks and SUVs Near You Check out Kijiji Autos classifieds for your next car, truck or SUV. Browse thousands of vehicles near you from private sellers and dealers.: 30.50 10.63 06:22
116getvn.com getvn.com Forsale Lander: n/a 1.62 n/a
117hotdailyflirts.com HotDailyFlirts.com HotDailyFlirts.com: 14.28 23.76 11:42
118disponivel.com.br Error Error: n/a 24.10 n/a
119cwr.ro Portal webmaster - Forum webmaster Informatii webmaster si administrator server. Tutoriale in limba romana, scripturi, design, reclama si marketing online.: n/a 17.60 n/a
120acelike.com: n/a 5.00 n/a
121natureworldtoday.com Homepage - Nature World Today: 86.10 17.00 03:38
122cambio.com Bad Request Celebrity News, Photos, Memes, and Viral Videos. Built by Girls, For Girls.: 100.00 1.50 n/a
123nnyads.com Classifieds | nny360.com: 80.00 5.77 17:51
124royalroadl.com Welcome | Royal Road Read stories online for free, or write your own story!: 84.33 0.00 01:25
125eharlequin.com Home - Harlequin.com Visit the official Harlequin book site. See the newest novels, discuss with other book lovers, buy romance books online.: n/a 7.10 n/a
126sixjoy.com: n/a 7.80 n/a
127liquidation.com Wholesale Electronics, Clothing, and More Auctions by Liquidators Wholesale electronics, wholesale clothing and more. Thousands of brand name wholesale merchandise auctions daily. The lead liquidation warehouse for auctions.: n/a 10.00 n/a
128dborevelations.com DBORevelations Portal DBORevelations, is an Emulator of the late, Dragonball Online MMO, that was shutdown late October 2013.: n/a 28.00 n/a
129jdlighting.com.au JD Lighting And Fans | Ceiling Fans | Lights Online | LED Lights | Downlights | Pendant Lights| Browns Plains | Brisbane | Logan | Gold Coast — JD Lighting The Very Best Lighting & Ceiling Fan destination in Brisbane and Online. JD Lighting is your one-stop-shop for all your Lighting needs at the best prices possible.: n/a 23.00 n/a
130iceland.co.uk Iceland - Error Processing Request shop online at iceland groceries and explore award winning products and convenient delivery slots. free next day delivery on orders over £40: 40.73 6.38 06:54
131mlmnews.com mlmnews.com Forsale Lander: n/a 5.23 n/a
132easyder.com: n/a 21.00 n/a
133morningstarfarms.com MorningStar Farms® Veggie Foods – Meatless burgers, breakfast, recipes and more MorningStar Farms® brings you the foods you love, veggie style – burgers, sausage, hot dogs, meatless recipes and more.: n/a 2.33 n/a
134******.cn
.CN - Free & Homemade Movies - Home
.CN - Free & Homemade Movies - Home: n/a 2.99 n/a
135legal***dispensary.com
Medical Dispensary & Doctors Directory | WeedMaps
WeedMaps.com is a community where medical patients connect with other patients and review local cannabis co-operatives and dispensaries: n/a 4.93 n/a
136notonthehighstreet.com Unique Gift Ideas and Personalised Gifts | notonthehighstreet.com Marketplace presenting items made by creative small British businesses. Products include jewelry, art and food. Shop our curated collection of gifts at Not On The High Street. Discover 1000's of gifts for all occasions from 1000’s of unique and personalised products by the UK’s best small creative businesses.: 48.85 3.00 09:41
137thehindu.com The Hindu: Latest News today from India and the World, Breaking news, Top Headlines and Trending News Videos. | The Hindu The Hindu Newspaper: Get latest News on Politics, Sports, Business, Arts, Entertainment and trending news Videos from The Hindu: 41.26 1.76 00:51
138rasmussen.edu Rasmussen College - Regionally Accredited College Online and on Campus Locations in several states. Offers several programs in business and medical transcription. Regionally accredited private college with 23 campuses in Minnesota, North Dakota, Florida, Wisconsin, Illinois, Kansas and online.: n/a 5.07 n/a
139salezilla.io Home | Salezilla Website: 8.70 20.04 42:43
140check24.de CHECK24 | Das Vergleichsportal CHECK24 - Das Vergleichsportal: Sparen Sie mit den Vergleichsrechnern! Versicherungen, Kredite, Strom-, DSL-Tarife, Reisen und Flüge im Vergleich.: 36.88 4.20 09:32
141hy-vee.com Attention Required! | Cloudflare Hy-Vee grocery store offers everything you need in one place! Order groceries online and enjoy grocery delivery, pickup, prescription refills & more! Shop now!: 36.17 4.97 03:29
142yoyo.com YoYo.com: Best Toys, Games, Books, Video Games, Music - Free Shipping Buy Kid's Toys at YOYO.COM. FREE 1-2 day shipping both ways, GREAT prices, BEST 24/7 customer service, & 365-day return policy.: n/a 4.86 n/a
143zanerobe.com ZANEROBE ZANEROBE Premium Denim and Streetwear. Refreshingly lacking in pretension, ZANEROBE’s simple and clean design aesthetic encourages a relaxed approach to fashion, appealing to both men and women who enjoy a street and sport lifestyle.: n/a 38.00 n/a
144fancybaths.com: n/a 99.99 n/a
145affiliazionionline.com: n/a 40.00 n/a
146filemaker.com Database Software | FileMaker Database Software | FileMaker: n/a 4.02 n/a
147zarahome.com Access Denied worldwide - zara home: 33.34 5.93 03:38
148websu.net: n/a 26.00 n/a
149williams-sonoma.com Williams Sonoma: Page not available in your region Page not available in your region: 52.17 3.47 03:09
150zonablade.com: n/a 12.10 n/a

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