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👻 Use your text editor to write in your browser. Everything you type in the editor will be instantly updated in the browser (and vice versa).

📱 Make videos playable inline on the iPhone (prevents automatic fullscreen)

🗻 Polyfill object-fit/object-position on <img>: IE9, IE10, IE11, Edge, Safari, ...

A curated list of awesome resources for WebExtensions development.

📕 Barebones boilerplate with Parcel 2, options handler and auto-publishing

CLI tool to upload Chrome Extensions to the Chrome Web Store

Upload Chrome Extensions to the Chrome Web Store

Colorize issue and PR links to see their status (open, closed, merged)

🛕 Reuse GitHub Actions workflows across repositories

DOM event delegation, in <1KB

Utility functions to use and combine `AbortSignal` and `AbortController` with Promises

Add editor-like tab-to-indent functionality to <textarea>, in a few bytes

Helps you manage and autosave your extension's options.

Browser Extension: preview GitHub notifications with same page pop-overs

🎑🤞 Load one or more images, return a promise. Tiny, browser-only, no dependencies.

WebExtension packages for every need

Lightweight querySelector/All/closest wrapper that returns an array and optionally throws if elements are not found

A Map subclass with support for multiple keys for one entry.

Detect support for WEBP images in the browser in 0.3KB

GitHub Action that sets the git user and email to enable commiting

Parse an HTML string into `DocumentFragment` or one `Element`, in a few bytes (in browser)

noop functions to help formatters and syntax highlighters recognize embedded code

Guide and OAuth helper to generate keys for Chrome Extensions upload

WebExtension module: Automatically registers your content_scripts on domains added via permission.request

Extremely minimal stylesheet/setup for Web Extensions’ options pages (also dark mode)

Cache values in your Web Extension and clear them on expiration. Also includes a memoize-like API to cache any function results automatically

Automatically expand a <textarea> to fit its content, in a few bytes

Insert text in a <textarea> and <input> (supports Firefox and Undo)

Browser-action context menu to request permission for the current tab.

Replicate `background-size: cover/contain` for canvas/CSS/Node/… on any type of media.

A more usable typed storage API for Web Extensions

Polyfill for the "History API: Scroll Restoration"

Creates GitHub releases for pushed tags, with the commit log as release body

List all the files in a GitHub repo’s directory

Detects where the current browser extension code is being run. Chrome and Firefox.

Paint video on canvas. Extra light.