GitHub

Polyfills EventListener behaviours from IE11 onward

Community guides for open source creators

A modal dialog that's opened with <details>.

This repository contains a sample script which can be used to enable security vulnerability alerts in all of the repositories in a given organization.

Auto-complete input values from server search results.

A custom element for cropping a square image. Returns x, y, width, and height.

Markdown formatting buttons for text inputs.

An input element that validates its value with a server endpoint.

Copy element text content or input values to the clipboard.

Query the document tree by selector, filtering by element type.

A menu opened with <details>.

Web component extensions to the standard <time> element.

Drag and drop task list items.

Install a shortcut to append selected text to a <textarea> as a Markdown quote.

Attach combobox navigation behavior to <input> or <textarea>.

Backports native emoji characters to browsers that don't support them by replacing the characters with fallback images.

A window.fetch JavaScript polyfill.

An accessible tab container element with keyboard support.

Crawl a website and run it through Google lighthouse

Paste spreadsheet cells as a Markdown table.

An opinionated collection of ESLint shared configs and rules used by GitHub.

Multiple checkbox selection helper.

GitHub.com's Babel configuration

Trigger an action on an element with a keyboard shortcut.

Annotate fields to be persisted on navigation away from the current page

A Client Side Includes tag

Boilerplate for creating a custom element.

An opinionated webpack config for GitHub apps.