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
51mangabit.com MangaBit.com - Read Manga Online Chapters for Free Read Manga Online Chapters for Free: n/a 12.90 n/a
52cad.com.cn: n/a 5.70 n/a
53timeout.co.uk Time Out | Best Things To Do and Events In Cities Worldwide Your ultimate guide to the best art and entertainment, food and drink, attractions, hotels and things to do in the world’s greatest cities.: n/a 3.59 n/a
54okp.com: n/a 4.19 n/a
55speurder.nl Speurders.nl - tweedehands en nieuwe producten kopen en gratis verkopen Op Speurders.nl vind je aanbiedingen, tweedehands en nieuw, te koop gevraagd en aangeboden.: 100.00 8.39 n/a
56breakville.com BreakVille - Take a Break Forsale Lander: n/a 21.50 n/a
57thefamily.com: 100.00 4.58 n/a
58electronicbeats.de Electronic Music News Blog, Live DJ Sets, Events | Telekom Electronic Beats Electronic Beats ▸▸ The electronic music program by Telekom ▸▸ News blog and interviews with the most compelling artists and events in contemporary music.: n/a 4.04 n/a
59alscan.net Shaved - Shaved Girls - Girls - ALS Scan is All Ladies Shaved - Welcome! All Ladies Shaved!: n/a 3.87 n/a
60sellmychannel.com SELLMYCHANNEL.COM Forsale Lander: n/a 5.81 n/a
61361ip.com: n/a 9.60 n/a
62kacafiksi.biz.id Kacafiksi Berita teknologi smartphone: 51.03 2.94 19:32
631000-express-downloads.net: n/a 2.45 n/a
64vinted.fr Vinted Rejoins la communautÃ© de mode de seconde main qui compte plus de 65 millions de membres. Donne une seconde vie Ã tes vÃªtements prÃ©fÃ©rÃ©s et gagne de l'argent en vendant les articles dont tu nâas plus besoin.: 22.18 12.47 12:19
65redeemyourprize.com redeemyourprize.com Forsale Lander: n/a 1.14 n/a
66speedlings.com: n/a 12.20 n/a
67allhitdeals.com 必威体育官网_必威体育APP-「官方下载」 Looking forward to buy a mobile phone, a laptop, a LED TV or a book? Wondering where to get the best of the prices? It's for sure if you've been surfing internet regularly off late, that you already know that online shopping portals today offer a MUCH MUCH better price than your conventional neighborhood market! The fact is that when it comes to pricing, no market, no store, no "dukaan" can actually beat the prices that you can get online. Well, now that sounds like a good reason to go shopping online. But wait! We know what you are thinking! You don't trust online shopping, right? Even if the prices are great, what is the guarantee of your product being delivered, delivered in time, if at all, your credit card being safe, the product being genuine, the warranty being in place? Phew! The list goes on. We understand there is a lot on your mind when you go shopping than just the price. So here comes the big question! Even if you wish to shop online, HOW DO YOU FIND THE BEST DEALS, å¿…å¨ä½“è‚²å®˜ç½‘æ˜¯æœ€ç¬¦åˆç”¨æˆ·éœ€æ±‚çš„æ¸¸æˆé—¨æˆ·ï¼Œä¸ºçŽ©å®¶æä¾›äº†å¤šæ¬¾ç²¾å½©çš„æ¸¸æˆï¼Œå…¨é¢æ·±å…¥çš„æ¸¸æˆèµ„è®¯ä»¥åŠä¸“ä¸šçš„è¡Œä¸šåˆ†æžå—åˆ°çŽ©å®¶ä»¬çš„è‚¯å®šå’Œç›¸å…³éƒ¨é—¨çš„æŠ€æœ¯æ”¯æŒï¼Œæ˜¯ç›®å‰å¸‚é¢ç”¨æˆ·æ•°æœ€å¤šçš„å¹³å°ã€‚: n/a 36.90 n/a
68urbanoutfitters.com Access to this page has been denied px-captcha: 50.63 0.00 09:46
69gwu.edu Offers comprehensive programs of undergraduate and graduate liberal arts study as well as degree programs in medicine, law, engineering, education, business/public management and international affairs.: 68.29 5.01 09:33
70rizhiwu.com: n/a 7.30 n/a
71meteomedia.com MÃ©tÃ©o actuelle Obtenez les informations mÃ©tÃ©o les plus rÃ©centes et prÃ©cises pour des milliers de villes canadiennes, amÃ©ricaines et internationales.: 51.46 0.00 05:02
72santavitoria.rs.gov.br
PÃ¡gina Inicial - Prefeitura Muni***l de Santa VitÃ³ria do Palmar: 43.28 6.07 13:37
73healthysmoothies.altervista.org Healthy Smoothies – Best Smoothie Recipes !: n/a 4.00 n/a
74big44.com: n/a 41.00 n/a
75singaporeair.com SIA-Maintenance Page book flight tickets from singapore to international destinations with singapore airlines. plan your holiday with our latest travel deals and promotions.: 32.54 6.81 05:55
76100cto.kz: n/a 48.00 n/a
77goldstarcollectibles.com Weiss Schwarz | United States | Gold Star Collectibles At Gold Star Collectibles we sell official products of Bushiroads which includes Weiss Schwarz Booster Boxes, Trial decks and more! Relive the classic, climactic scenes from your favorite anime through the Weiss Schwarz Trading Card Game.: 41.34 99.99 19:23
78litnet.com Читать книги онлайн бесплатно полностью, скачать в fb2, epub, mobi — «Литнет» Самая крупная литературная платформа и библиотека, которая превращает чтение и публикацию книг в удовольствие. Более 180 000 книг, которые можно бесплатно читать онлайн и скачать. Все популярные жанры: любовный роман, фэнтези, фантастика и другие.: 25.99 8.01 17:04
79westelm.com West Elm: Modern Furniture, Home Decor, Lighting & More West Elm offers modern furniture and home decor featuring inspiring designs and colors. Create a stylish space with home accessories from West Elm.: 45.71 4.40 03:49
80holyfaithmatrimony.com: n/a 20.50 n/a
81tamilcinema365.com: n/a 46.00 n/a
82setlist.fm setlist.fm - the setlist wiki Over 4,590,000 concert setlists of more than 216,900 artists including tour and song statistics, personal statistics, videos and much more.: 51.26 3.61 04:37
83footsmart.com footsmart.com FootSmart offers comfortable shoes, socks and foot care products to relieve foot problems. Browse our selection of dress shoes, casual shoes, sandals and orthopedic products. Get information about foot conditions, solutions and treatments.: n/a 6.28 n/a
84slm.fi Tilaa ruokaa netissä, nopea kotiinkuljetus | Pizza-online.fi Tilaa ruokaa netissä - kotiinkuljetus hetkessä! Kaikki ravintolat löytyy yhdestä osoitteesta, halusit sitten pizzaa, falafelia, hampurilaisia tai sushia.: n/a 37.00 n/a
85leadpages.net Leadpages | Website & Landing Page Software Small Businesses A powerful landing page builder that helps create high-converting landing pages and drive sales for businesses. Lead generation and opt-in tools integrated.: 49.45 4.44 04:59
86cliniko.com Allied Health Practice Management Software - Cliniko Practice management software designed for allied health practices. Cliniko is secure, easy to use, and used by over 65, 000 health professionals.: n/a 0.00 n/a
87***py***.nl: n/a 4.58 n/a
88isavelink.com iSavelink.com - Friendly Filehosting Site - Easy way to share your files iSavelink.com - Friendly Filehosting Site - Free file upload service: n/a 9.10 n/a
89revolut.com Just a quick security check | Revolut join 40+ million customers globally using revolut to send money to 160+ countries, hold up-to 36 currencies in app, spend in 150+ currencies, and manage their money.: 41.12 4.15 04:16
90eyebuydirect.com
Prescription Eyewear - Online Eyegl*** and Sungl*** Store | EyeBuyDirect
EyeBuyDirect.com offers top of line prescription eyegl*** from $7.95, sungl***, and sports gl***--all made to prescription. Brands available include: Armani, Gucci, Carrera, Guess, and Timberland.
Shop for high-quality gl*** and sungl*** at EyeBuyDirect.com, Starting at just $6. See our huge selection of prescription eyewear in our online store now.: 46.59 7.50 12:46
91newscode.gr: n/a 6.50 n/a
92zalando.nl Zalando | Kleding, schoenen & accessoires online kopen Zalando online | Mode, beauty, sport & accessoires | Jouw favoriete merken voor dames, heren & kids | Zalando: 39.80 6.56 04:26
93anthropologie.com Access to this page has been denied px-captcha: 44.18 0.00 10:43
94setral.de: n/a 81.00 n/a
95edenvale.za.net: n/a 6.42 n/a
96tsheets.com Free Time Tracking Software | TSheets Time tracking employees actually love. Clock in, clock out on a desktop, laptop, mobile phone—even by iPhone or Android app, text message or dial-in. Track time with easy real-time punch clock or manual time entry options. Monitor billable hours, PTO, and GPS locations. Includes invoicing and integrates with most payroll providers. $5 per user per month. Free 14-day trial. Free 14 day trial! Time tracking software that makes it easy to track your employees time. TSheets is highly trusted with over 20,000 five-star app reviews.: n/a 3.84 n/a
97kobo.com Challenged | Kobo.com 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.: 68.95 0.00 04:28
98catch.com.au Great daily deals at Australia's favourite superstore | Catch.com.au Low prices on the biggest brands in fashion, tech, beauty, grocery, sports, and more at Catch. Huge savings every day! It's massive! Formerly Catchoftheday - now Catch!: 44.86 4.72 03:58
99todocelular.com.ar: n/a 3.93 n/a
100stocksignals.us Stock Signals And Swing Trade Alerts Get the BEST stock signals and swing trade alerts online! Triple-digit returns going back to 2019. Free 14 day trial.: n/a 3.18 n/a

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