Compatibility

• Compatible with iOS 8.0 +

Description

• Provides polyfills for some JavaScript features that are not available on old iOS versions.

  Check out this page for recommended experimental WebKit features to enable to further enhance web compatibility.

  In 2025, iOS 15 and lower are considered "old". A lot of websites would outright stop working on these versions as they no longer provide necessary polyfills.

  Avoid installing version 1.5.0 to 1.9.0 on iOS 15 and lower as there is a high CPU usage bug.

Changelog

• 2.13.0: 

  Made scripts from the same folder (scripts, scripts-priority or scripts-post) loaded all at once

  Added "Spoof User Agent" option in tweak settings to manually spoof user agent to iOS 16.3 (Some websites could break with user agent spoofing enabled such as pinterest.com)

• 2.12.3: Improved viewport CSS workaround (< 15.4)

• 2.12.2: Moved globalThis polyfill to priority scripts (< 12.1)

• 2.12.1: 

  Fixed Document Fullscreen API polyfill breaking some websites (< 16.4)

  Fixed String.startsWith and String.endsWith polyfills not working (< 9.0)

• 2.12.0: 

  Added support for priority scripts (loaded before any other scripts)

  Added polyfill for navigator.hardwareConcurrency (< 15.4)

  Added support for smooth behavior in Scrolling API (< 15.4)

• 2.11.0: 

  Improved safety checks in Document Fullscreen API polyfill (< 16.4)

  Added polyfill for Crypto.subtle (< 11.0)

• 2.10.0: 

  Added polyfill for Document Fullscreen API (< 16.4)

  Fixed broken functionalities in BroadcastChannel polyfill (< 15.4)

• 2.9.0: 

  Added polyfill for Float16Array (< 18.2)

  Fixed CompressionStream polyfill not working in some cases (< 16.4)

  Improved BroadcastChannel polyfill error handling (< 15.4)

• 2.8.1: Spoofed iOS version to 16.3 for devices running under iOS 16.3

• 2.8.0: 

  Added support for extended ISO 8601 date format (< 16.0)

  Removed `max-width: 100% from viewport CSS workaround

• 2.7.0: 

  Added polyfill for String.matchAll (< 13.0)

  Added polyfill for globalThis (< 12.1)

  Added polyfill for Reflect (< 10.0)

• 2.6.0: 

  Added polyfill for structuredClone (< 15.4)

  Added polyfill for Object.getOwnPropertyDescriptors, String.padStart and String.padEnd (< 10.0)

  Added polyfill for Number.{EPSILON,MAX_SAFE_INTEGER,MIN_SAFE_INTEGER,NEGATIVE_INFINITY,POSITIVE_INFINITY}. Number.isInteger and Number.isSafeInteger (< 9.0)

• 2.5.0: 

  Included iOS 15.2 - 15.3 for viewport CSS workaround

  Made viewport CSS workaround apply to only mobile devices

  Added polyfills for Array.flat, String.trimStart, String.trimEnd and Symbol.description (< 12.0)

  Added polyfill for Promise.finally (< 11.1)

  Simplified NodeList.forEach polyfill (< 10.0)

• 2.4.0: 

  Added polyfill for RegExp.escape (< 18.2)

  Added polyfills for Array.toSorted, Array.toSpliced and Array.with (< 16.0)

  Added polyfill for Promise.any (< 14.0)

  Added polyfill for Object.fromEntries (< 12.1)

  Fixed Element.matches compatibility workaround still not working correctly (< 15.6)

  Included iOS 15.0 - 15.1 for viewport CSS workaround

• 2.3.1: Added RegExp Lookbehind (Polyfills) tweak as a dependency

• 2.3.0: 

  Removed RegExp lookbehind polyfill as it is now part of a separate package RegExp Lookbehind (Polyfills)

  Added polyfill for dynamic import (< 15.2)

  Added polyfill for Object.getOwnPropertySymbols (< 9.0)

• 2.2.3: Fixed app crash due to problematic RegExp (< 16.4)

• 2.2.2: Fixed RegExp lookbehind polyfill breaking some websites (< 16.4)

• 2.2.1: Improved RegExp lookbehind polyfill (< 16.4)

• 2.2.0: 

  Made CSS Cascade layers workaround work for dynamically added stylesheets

  Added polyfill for EventTarget (< 14.0)

  Readded viewport CSS workaround (< 15.0)

  Fixed HTMLDialogElement stub polyfill not working (< 15.4)

• 2.1.0: 

  Made the JS code injected as soon as it is loaded from the filesystem

  Simplified polyfill for CompressionStream

• 2.0.0: 

  Made all JS code loaded from files only when needed by that iOS version to reduce memory footprint on injection

  Added polyfills for Array.group, Array.groupBy, Array.groupToMap, Object.groupBy, Map.groupBy and Promise.withResolvers (< 17.4)

  Fixed Element.matches compatibility workaround not working on iOS 15.4 - 15.5 (< 15.6)

• 1.12.0: 

  Worked around CSS dynamic viewport units not working by replacing `{d,s,l}v{w,h} with just v{w,h} (< 16.4)

  Worked around CSS Cascade layers not working by stripping `@layer` from stylesheets (< 15.4)

  Prevented HTMLDialogElement stub polyfill from being injected if its corresponding experimental WebKit feature is enabled (< 15.4)

• 1.11.0: 

  Added the settings page to enable/disable the tweak

  Disabled RegExp lookbehind polyfill on twitter.com to avoid breaking the website (< 16.4)

• 1.10.0: 

  Fixed requesting desktop website not working in Safari

  Added polyfills for Array.from (< 9.0), Array.fromAsync (< 16.4) and Array.includes (< 9.0)

  Added polyfill for CSS.escape (< 10.1)

  Added polyfill for NodeList.forEach (< 10.0)

  Added polyfills for Object.assign (< 9.0), Object.entries (< 10.1) and Object.values (< 10.1)

  Added polyfill for Proxy (< 10.0)

  Added polyfills for String.startsWith, String.endsWith and String.includes (< 9.0)

  Added polyfill for Symbol.asyncIterator (< 11.1)

  Added polyfill for WeakSet (< 9.0)

• 1.9.2: 

  Fixed user agent spoofing not working (regression of 1.9.1)

  Fixed Safari crashing on iOS 8

• 1.9.1: 

  Added polyfill for RegExp lookbehind (< 16.4)

  Added polyfill for BroadcastChannel (< 15.4)

  Added polyfill for Array.toReversed (< 16.0)

  Spoofed iOS version to 16.0 for devices running under iOS 16.0

  Fixed websites always loading in desktop mode

  Fixed polyfill compatibility with iOS 13.0 and lower

  Fixed polyfill for Array.at, Array.findLast and Array.findLastIndex

  Fixed the same polyfill scripts being injected multiple times

  Restricted certain polyfills to execute only on the maximum unsupported iOS version and lower

  Restricted CompressionStream polyfill to iOS 16.3 and lower

  Restricted ReadableStream, WritableStream and TransformStream polyfills to iOS 14.0 and lower

  Restricted WebStreams polyfill to iOS 14.0 and lower

• 1.4.0: 

  Added missing polyfill for Web Streams (necessary for CompressionStream)

  Added polyfill for Element.checkVisibility (< 17.4)

  Removed problematic viewport CSS workaround

• 1.3.0: 

  Allows polyfills to be injected into iframes

  Added polyfill for CompressionStream (< 16.4)

  Fixed support for old iOS versions

• 1.2.0: Added polyfills for Promise.allSettled and the meta viewport min-width

• 1.1.1: Removed the code that removes all other user scripts

• 1.1.0: 

  Minified all JavaScript codes before injecting

  Added support for injecting JavaScript after the document is loaded

  Added polyfills for Array.findLast, Array.findLastIndex and Object.hasOwn (< 15.4)

  Added polyfill for String.replaceAll (< 13.1)

  Added viewport CSS workaround to fix incomplete page width on iOS 14 and lower

Information

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