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
401cruisetrust.com: n/a 41.00 n/a
402artofproblemsolving.com Art of Problem Solving Online school, textbooks, and many other resources for eager math students grades 2-12.: 34.14 4.10 10:32
403fappanni.altervista.org: n/a 1.00 n/a
404go2cl.com: n/a 14.00 n/a
405livewellsports.com Live Well Sports | Sports and Activities for the Adventurous Life Live Well Sports | Sports and Activities for the Adventurous Life: n/a 31.00 n/a
406scoutstuff.org ScoutStuff.org The BSA's Online Catalog: n/a 8.70 n/a
407techbubble.net: n/a 70.00 n/a
408yadayadasisterhood.com: n/a 52.00 n/a
409lovefount.com: n/a 13.60 n/a
410wpfanpro.com: n/a 2.24 n/a
411theathletesfoot.com.au Over 130 Shoe Stores | The Athlete's Foot Australia | Buy Shoes Online | Online Shoes The Athlete's Foot Australia offers you a convenient way to buy shoes online and in-stores. You can browse online our great range of shoe brands including Adidas, Ascent, Asics, Brooks, Columbia, Ecco, FitFlop, Instride, Merrell, Mizuno, New Balance, Nike, Rockport, Ryka, Saucony, The North Face, Vivo and more. You can always visit our The Athlete's Foot shoe stores located at more than 140 locations across New South Wales (NSW), Victoria (VIC), Quensland (QLD), Western Australia, Northern Territory (NT), South Australia (SA), Australian Capital Territory (ACT), Tasmania and (TAS). Our Australian shoe shops are located on most important cities, regional and country towns including Sydney, Melbourne, Brisbane, Perth, Adelaide, Hobart and Darwin. Find your nearest store today!: n/a 12.00 n/a
412channelcut.com: n/a 7.40 n/a
413ezibuy.com.au Womens Clothes, Fashion & Homewares Online | EziBuy AU Introduction to EziBuy History February 19, 2007 "When I founded the business with my brother, Gerard, in Palmerston North more than 30 years ago, I could not envisage that it would evolve into what it is today" says Peter Gillespie. EziBuy's first catalogue was a folded, A3 sheet of paper with black and white line drawings, advertising everything from womenswear to hardware. It was posted to a mailing list of clubs and organisations compiled from telephone directories in 1978. ... EziBuy is the #1 online shopping destination. Find the latest in womens, mens & kids fashion as well as homewares. Shop online with 30-day returns!: n/a 6.30 n/a
414pdisk.net PDisk Network disk - Official PDisk - Free file upload service: 52.16 2.03 08:38
415wareseeker.com WareSeeker - Search and Free Download Windows Software Free Download Software For Windows: n/a 4.66 n/a
416housemastery.com: n/a 5.80 n/a
417phatforums.org: n/a 22.00 n/a
418sharetronix.com Sharetronix - The Ideal Microblogging Tool for Your Community Sharetronix is the world's favorite opensource microblogging software. Sharetronix empowers people to exchange ideas and multimedia in real-time. We facilitate collaboration in more than 10,000 communities all over the World.: n/a 9.00 n/a
419h2owirelessnow.com Prepaid Monthly Unlimited and Pay Go Plans | No Annual Contract| h2o Wireless Find great smartphones, wireless plans, and service at low prices with no annual contract. Running on one of the most reliable GSM networks with superior nationwide coverage.!: n/a 3.09 n/a
420wikiconsole.com: n/a 23.00 n/a
421hpconnected.com HP Smart HP Connected: 33.48 0.00 05:23
422watchthiscam.com: n/a 12.80 n/a
423soloeduca.org: n/a 22.00 n/a
424sitekarma.com Site Reviews, Spam, Scam & Fraud Reports at SiteKarma.com Site Reviews, Spam, Scam & Fraud Reports at SiteKarma.com: n/a 1.75 n/a
425xinliyang.com: n/a 18.00 n/a
426fastcocreate.com Co.Create: Creativity \ Culture \ Commerce Creativity in the converging worlds of advertising, entertainment, and technology.: n/a 1.36 n/a
427kingunivc.com: n/a 9.40 n/a
428motorcycle-superstore.com Motorcycle Gear, Parts and Accessories - Motorcycle Superstore Motorcycle Superstore offers the largest selection of motorcycle gear, cheap cycle parts, apparel and accessories at the guaranteed lowest prices on top brands like Icon, Fox… Motorcycle-Superstore is your #1 source for quality motorcycle riding gear at a great price!: n/a 3.70 n/a
429graphiics.com: n/a 8.40 n/a
430lambingan.to lambingan.to - This website is for sale! - lambingan Resources and Information. Tambayan pinoy teleserye replay pinoy-ako phnoy telebyuwers: n/a 3.98 n/a
431theshogun.jp: n/a 12.00 n/a
432envywomen.com Envywomen.com | Women's Online Magazine Envywomen.com | Women's Online Magazine: n/a 6.50 n/a
433motionpartsus.com: n/a 52.00 n/a
4343dhubs.com 3D Hubs: Browse Online 3D Printing Services Upload your design to get free instant quotes. Select a 3D printing service, choose a material and have your order delivered within 48 hours.: n/a 2.73 n/a
435virtuousgirlhood.com: n/a 5.20 n/a
436gardenshot.com GardenShot: n/a 3.53 n/a
437cardinalinnovations.org We are a managed care organization in North Carolina. With a unique model of community-based care, we coordinate compassionate support for our members through a network of expert providers. We are active in our communities, advocating on behalf of people living with IDD/MH/SUD. Begin exploring our organization today.: n/a 22.00 n/a
438bestbag.pp.ua: n/a 3.64 n/a
439bloggingtest.altervista.org El Cofre del Tesoro | Las mejores Guías y Tutoriales para crear, diseñar, gestionar, optimizar y rentabilizar tu blog. Las mejores Guías y Tutoriales para crear, diseñar, gestionar, optimizar y rentabilizar tu blog.: n/a 1.00 n/a
440danner.com
Danner - Since 1932
We are a company of craftsmen s*** in the art of footwear. Rooted in the Pacific Northwest, we strive each day to uphold ourselves to the highest standards.: n/a 5.00 n/a
441enjoei.com.br Enjoei - Venda Rápida e Segura | Comece a Vender Agora A melhor plataforma para você comprar e vender online roupas, sapatos, bolsas e acessórios. Ofertas e promoções com cupons de até 50% no app! Aproveite.: 51.81 4.19 10:10
442latestmanga.net: 57.68 5.90 19:39
443jaguarpc.com Web Hosting | VPS Hosting | Reseller Web Hosting | Dedicated Servers - JaguarPC Web Hosting | VPS Hosting | Reseller Web Hosting | Dedicated Servers - JaguarPC: n/a 2.83 n/a
444androidmoon.com: n/a 15.00 n/a
445apsu.edu Austin Peay State University | Middle Tennessee Clarksville, TN Austin Peay State University (APSU), located in Clarksville, Tennessee, is the state's fastest growing university. We are home to the Govs and Lady Govs.: n/a 9.84 n/a
44699acres.com
Access Denied
Get latest policy change updates and its impact ***ysis on real estate sector on 99acres. Read articles, news, expert columns on Real Estate Policy Change.: 33.31 4.42 03:59
447haitian-recipes.com: n/a 36.00 n/a
448caraytech.com: n/a 21.00 n/a
449goldgain.biz GoldGain - The name you can trust GoldGain - The name you can trust: n/a 3.57 n/a
450filament.io
Filament - A blog ***ytics and plugin platform that increases engagement
A blog ***ytics and plugin platform providing actionable insights and included plugins to increase audience engagement and blog readership.: n/a 4.30 n/a

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