Polyfill

Polyfill is used by 1.12% of sites

Official Website

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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
151carcepts.com: n/a 5.17 n/a
152huecos.com.ve: n/a 70.00 n/a
153euro-test.eu: n/a 45.00 n/a
154hunterboots.com Hunter Boots Official Online Store UK | New AW14 Styles Buy wellington boots from Official Hunter Boot website. Browse our Womens, Mens and Kids original, traditional and festival wellies and accessories. Click Here.: n/a 5.12 n/a
155experientevent.com: n/a 4.70 n/a
156lmctruck.com Truck Parts & Truck Accessories for Chevy, GMC, Ford & Dodge Trucks | LMCTruck.com Come to LMCTruck.com for all your truck parts and accessories needs. We carry truck parts for Chevy, GMC, Ford, Dodge trucks and more!: n/a 14.30 n/a
157esspert.com: n/a 27.00 n/a
158haveityourway.com: n/a 3.03 n/a
159latinamericancupid.com Latin Dating & Singles at LatinAmericanCupid.com™ Meet Latin singles on LatinAmericanCupid, the most trusted Latin dating site with over 5 million members. Join now and start making meaningful connections!: n/a 0.00 n/a
160saveur.tv: n/a 6.05 n/a
161mmaco.net MMACO - Mark McDaniels and Company MMACO Email Advetising Business Creation and Web Hosting.: n/a 7.90 n/a
162toolstation.com Toolstation | Low prices on 25,000+ trade quality products Low prices on 25,000+ trade power tools, heating and plumbing supplies, hardware and more | Click and Collect at 550+ stores | FREE delivery on orders over £40: 38.36 4.52 04:48
163***evod.org: n/a 5.58 n/a
164blinds.com Blinds | Window Blinds and Shades | Custom Window Coverings Buy Blinds and Shades at Blinds.com, the #1 online seller of blinds in the world. You won't find lower prices on custom window coverings anywhere else!: n/a 5.59 n/a
165wharf.co.uk News in Canary Wharf | InYourArea | Canary Wharf's exclusive weekly paper containing news on Dockland's companies, people, transport, leisure, and entertainment. Get the latest news and local information from in and around Canary Wharf and the Docklands with The Wharf - only at InYourArea.co.uk. The best for news in Canary Wharf.: n/a 2.41 n/a
166freevectors.net Free Vector Art & Graphics :: Recent Vectors :: Page 1 Free Vector Art & Graphics :: Recent Vectors :: Page 1: n/a 5.68 n/a
167travelplanner.net travelplanner.net travelplanner.net: n/a 28.00 n/a
168christianlouboutin.com Christian Louboutin official web site. Luxury french shoe and bag designer. Christian Louboutin official web site. Luxury french shoe and bag designer: n/a 6.50 n/a
169vitaminwagon.com: n/a 62.00 n/a
170investorsbeyondborders.com: n/a 10.50 n/a
171imediafox.com Forsale Lander: n/a 2.45 n/a
172trustjacker.com Copy, Paste & Share Your Way To Profits Copy, Paste & Share Your Way To Profits: n/a 2.17 n/a
173he150.com: n/a 5.40 n/a
174repl.it Replit: the collaborative browser based IDE - Replit Run code live in your browser. Write and run code in 50+ languages online with Replit, a powerful IDE, compiler, & interpreter.: 52.47 0.00 15:59
175vui.vn HTML cong vao Nhacvui 2 HTML cong vao Nhacvui 2: 50.00 5.66 00:04
176sringaram.com: n/a 27.00 n/a
177checkmatenewyork.com: n/a 33.00 n/a
178yfittopostblog.com Bad Request: n/a 1.52 n/a
179marialist.com: n/a 18.00 n/a
180wantickets.com wantickets.com United States Party Guide. Your source for local parties, events, tickets, and more in United States: n/a 4.08 n/a
181temptingfling.com Temptingfling.com Temptingfling.com: 81.60 0.00 17:51
182xinyour.com: n/a 9.10 n/a
183jewelryincandles.com Jewelry In Candles choose your Ring Size in every Jewelry Candle, Jewelry Tarts & Jewelry Aroma Beads Jewelry In Candles the only Jewelry Candle company you can choose your ring size in every scented product. Candles with Jewelry have hidden jewelry waiting to be discovered! Jewelry Candles, Wax Tarts & Aroma Beads.: n/a 8.50 n/a
184potterybarnkids.com Kids’ & Baby Furniture, Kids Bedding & Gifts | Baby Registry | Pottery Barn Kids Pottery Barn Kids offers kids & baby furniture, bedding and toys designed to delight and inspire. Create or shop a baby registry to find the perfect present.: 46.57 4.50 08:26
185hrblockonline.ca H&R Block 2015 H&R Block 2015: n/a 16.50 n/a
186lef.org lef.org Life Extension is a global authority on nutrition, health and wellness. We supply only the highest quality nutritional supplements, including vitamins, minerals, herbs, hormones and anti-aging supplements.: n/a 2.90 n/a
187staples.ca Staples.ca: Next-Day Shipping, On All Orders Shop Staples Canada for business essentials, back to school, electronics, office supplies, and more. Fast Free Delivery, Curbside Pickup, and Easy Returns.: 41.29 3.12 06:35
188c21stores.com Shop Men's and Women's Clothing & Accessories | Century 21 Shop at Century 21 for shoes, clothing, jewelry, dresses, coats and more from top brands with trendy styles. Enjoy free shipping on orders of $75+!: 47.08 5.80 05:09
189rew.ca Welcome to the Real Estate Weekly website. The Lower Mainland's best source for real estate in print and on the web Listings of homes, condos, townhomes for sale. Browse by area or price, or search by keywords. Find homes, condos and houses for sale in BC and Greater Toronto Area. REW.ca provides the latest real estate listings, home buying tips and market news.: n/a 8.39 n/a
190e-university.dk: n/a 5.30 n/a
191flirtingneighbors.com FlirtingNeighbors.com flirtingneighbors.com: 28.04 8.75 08:14
192bgoex.io: n/a 5.80 n/a
193xtremecollection.com XtremeCollection.com is available at DomainMarket.com. Call 888-694-6735 Domain for Sale. XtremeCollection.com. Request Price. What Are the Advantages of a Super Premium .Com Domain? Increased Traffic. Search Engine Ranking. Brand Recognition. Immediate Presence. Higher Profits. Great Investment. #1 in Premium Domains. 300,000 of the World's Best .Com Domains.: n/a 1.52 n/a
194ocreef.com
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Online fish aquarium supplies store offering pet fish merchandise, cree led aquarium lights, sal***er fish tank leds, protein skimmers, cree led reef tank lights, power head pumps, and calcium reactors.: n/a 9.50 n/a
195rohibook.com: n/a 24.00 n/a
196danni.org danni.org Forsale Lander: n/a 3.49 n/a
197burgerchamp.com burgerchamp.com | 404 - Page Cannot Be Found burgerchamp.com | 404 - Page Cannot Be Found: n/a 9.10 n/a
198waketech.edu Lead the Way | Wake Technical Community College Wake Technical Community College: n/a 9.30 n/a
199unisa.edu.au UniSA - University of South Australia The largest university in South Australia. Offers courses to undergraduate and post graduate students in most disciplines. UniSA is South Australia's no 1. university for graduate careers. Study, explore our research or partner with us.: 55.24 5.84 13:12
200scikotics.com Scikotics.com Scikotics.com: n/a 28.00 n/a

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