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
551montage-servis.com: n/a 1.22 n/a
552blockbuzz.com BlockBuzz.com - A Fun Way to Advertise & Make Money BlockBuzz.com - A Fun Way to Advertise & Make Money: n/a 8.90 n/a
553cardconnect.com CardConnect | Simple + Secure Payment Integration CardConnect provides seamless credit card payment integration services for all businesses, protected by powerful security solutions. Learn More.: 41.38 3.90 05:11
554oysho.com OYSHO España | Sport, Baño y Beachwear | Sitio Oficial Descubre ahora la colección Primavera Verano 2022 de OYSHO. Las últimas tendencias en ropa técnica de deporte, baño y beachwear para esta temporada.: 33.27 6.58 04:28
555missoma.com Jewellery | Personalised Womens Jewellery | Gold & Silver Jewellery Online | Missoma Missoma leads the way in demi-fine jewellery, offering contemporary statement, delicate and personalised jewellery for the everyday woman. Enjoy complimentary engraving and free UK & US delivery.: 30.95 5.70 08:58
556hubspotemail.net Trust & Safety Policies: 80.16 1.24 03:59
557campus-world.de: n/a 20.00 n/a
558myeliquid.com: n/a 44.00 n/a
559cubacontemporanea.com Cuba Contemporánea Revista sociocultural enfocada en la Cuba de hoy. Reportajes, entrevistas, análisis, comentarios y crónicas sobre la realidad cubana.: n/a 18.60 n/a
560slickdealscdn.com: n/a 1.34 n/a
561affix.is: n/a 2.60 n/a
562answersnext.com: n/a 5.70 n/a
563soundsnap.com Royalty Free Sound Effects & Royalty Free Music Library | Unlimited Access $249 | Soundsnap Get unlimited access to over 450,000+ royalty free sound effects & Royalty Free Music tracks from the Soundsnap Sound Library for just $249 per year. Our curated library is updated weekly with new SFX & Relevant Music.: n/a 3.22 n/a
564u18up.net: n/a 5.60 n/a
565bloodyrage.com: n/a 9.30 n/a
566bloodymilk.com: n/a 9.30 n/a
567celebritystreetwind.com Celebrity Street Wind Celebrity Street Wind: n/a 12.00 n/a
568elderly.com Elderly Instruments - Welcome - Elderly Instruments Elderly Instruments - Welcome - Elderly Instruments: n/a 5.60 n/a
569168yijidh.com: n/a 18.00 n/a
570tedtv.com: n/a 1.67 n/a
571myinternetcashtactics.com: n/a 3.06 n/a
572canadianblackbook.com Canadian Black Book | Used Cars | New Cars | Cars For Sale Canadian Black Book provides free car values, new/used car prices and vehicle listings. Canada's trusted resource for over 50 years: n/a 8.06 n/a
573carsluxurious.com: n/a 6.10 n/a
574coprenic.com: n/a 2.09 n/a
575twu.edu Texas Woman's University - Home Texas Woman's University, with campuses in Denton, Dallas, and Houston, Texas, offers bachelor's, master's, doct and online degrees in the health sciences, education, business and liberal arts to undergraduate and graduate students.: n/a 5.84 n/a
576511tactical.com 5.11 Tactical – Purpose-Built Tactical Gear, Apparel & Accessories Manufacturer of tactical and competition supplies, equipment and apparel.: 43.61 3.99 06:52
577financearch.com: n/a 5.40 n/a
578uucq.com: n/a 4.80 n/a
579babytokidsboutique.com: n/a 60.00 n/a
580tiffany.co.uk: n/a 5.10 n/a
581back***ngunlimited.com
Hiking & Tactical Backpacks, Waist Packs, DayPacks
Back***ng Unlimited sells, Maxpedition, 5.11 Tactical, Chinook, Everest, Swiss Gear, NCStar, Alps Mountaineering, Blackhawk, & Stansport Backpacks. Shop.: n/a 50.00 n/a
582beachbodyondemand.com BODi - Fitness, Nutrition, and Mindset for your Health Esteem Login or activate your BODi account (formerly Beachbody on Demand). You’ve tried working out before; BODi keeps you engaged in ways that work for you.: 45.26 3.49 02:26
583approp.pro approp.pro Forsale Lander: 39.44 1.39 09:06
584allabolag.se
allabolag.se - Företagsinformation om alla Sveriges bolag
Tjänsten som ger alla tillgång till bok***, befattningshavare, kreditupplysningar, adresser och annan företagsinformation.: n/a 0.00 n/a
585authspot.com Authspot | Your Spot For Creative Writing As our name implies, Authspot is the place to go for original writing. Authspot authors are poets, creative writers, biographers, lyricists, screenwriters, and endless combinations of the above. If you’re looking for great original writing, take a look at our growing collection.: n/a 2.16 n/a
586thadeckklan.com: n/a 6.00 n/a
587thachrealestategroup.com: n/a 6.00 n/a
588binghamton.edu Binghamton University Official web site. Binghamton University is the number-one ranked public university in New York. A world-class university built on a foundation of strong academics and vibrant research. Our unique character – shaped by outstanding faculty and engaged students – promotes student success on campus and beyond.: 22.93 5.80 14:23
589sonder.com Sonder | Taking Stay Further. Sonder - a new way to stay in your favorite neighborhoods around the world.: 39.95 6.00 05:57
590californiamoves.com Find Real Estate & Homes For Sale - ColdwellBankerHomes.com ColdwellBankerHomes.com can help you find homes for sale, rentals, condos, Realtors and information about your local real estate market.: n/a 4.34 n/a
591tvstreaming.cc MovieTube - Watch Series watch series online,watch tv shows online, watch full episodes,watch series, watch series free, series online: n/a 2.68 n/a
592resumegenius.com Just a moment... Applying for jobs is hard, but our resume builder makes it easy. Download free templates, read expert writing guides, and try our software today.: 44.07 5.71 03:31
593kobobooks.com
kobobooks.com
Sells an e-Ink reader, apps for mobile devices and associated ebooks. Site includes FAQs, firmware upgrades, option to contact technical support, specifications, manuals, do***entation and usage information for consumers.
Open up to over 6 million eBooks and audiobooks on award-winning eReaders and the free Rakuten Kobo App. Find Daily Deals, read previews & reviews and get book recommendations.: 47.18 3.00 08:21
594world54.duckdns.org world 54 world 54: n/a 5.60 n/a
595casamundo.sk: n/a 14.00 n/a
596wshome.com Luxury Furniture, Bedding, Bath & Decor | Williams-Sonoma Home Shop Williams-Sonoma Home for exceptionally crafted home furnishings, luxury bedding and bath linens, and casually elegant home decor. Choose from a wide array of handcrafted furniture frames and luxury fabrics to create a beautiful custom retreat.: n/a 4.70 n/a
597selectcovers.com: n/a 36.00 n/a
598lisd.net Lewisville Independent School District Includes calendars and information for parents, students, and teachers.: n/a 5.90 n/a
599fix100.com Fix100 Home Page Fix100 Home Page: n/a 1.10 n/a
600radbag.de Originelle Geschenke, Gadgets und Spaßiges Originelle Geschenke, peppige Lifestyle Accessoires und clevere Gadgets - radbag hat alles, was du nicht unbedingt brauchst, aber ganz sicher haben willst!: n/a 10.80 n/a

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