basecamp/trix

Features

• Rich Text Editors - Provides a visual interface for creating and formatting documents with inline and block-level styling options.
• HTML to Document Parsers - Maps raw HTML strings into an internal representation of blocks and inline elements for structured editing.
• Web Authoring Environments - Implements a professional writing area within web apps that manages attachments, edit history, and sanitization.
• ContentEditable Wrappers - Uses the native browser contenteditable attribute to manage direct user text manipulation and rich formatting.
• Sanitizing HTML Editors - Manages and sanitizes HTML input to ensure a secure and consistent document structure.
• Rich Text Editors - Offers a visual writing interface for composing and formatting documents with inline styling and block elements.
• Document State Management - Tracks edit history and manages the serialized state of the rich text document.
• Rich Text Styling - Implements bold, italic, headings, and list formatting for selected text or content blocks.
• Rich Text WYSIWYG Editors - Provides a WYSIWYG text component that converts rich text into data for HTML form submissions.
• Visual Editor Interfaces - Provides a customizable visual editing area that supports vertical expansion and integrated formatting tools.
• WYSIWYG Editors - Provides a WYSIWYG interface where users see the final visual result of their formatting while writing.
• Form Field Synchronization - Binds document content to hidden input fields to ensure compatibility with standard HTML form submissions.
• Input Sanitizers - Filters incoming HTML through a whitelist-based cleaner to remove unsafe tags and mitigate security risks.
• HTML Form Integration - Connects the rich text editor directly to standard HTML forms to facilitate formatted content submission.
• File Attachment Systems - Processes dragged or pasted files as attachments to be uploaded to remote storage.
• Editor Event Handlers - Implements an event system to monitor and respond to editor initialization, content changes, and attachment handling.
• Action-Based State Transitions - Modifies document state through a central dispatcher using discrete action commands for formatting and content changes.
• Persistence and Serialization - Converts the document structure and cursor position into a plain text format for persistent storage and restoration.
• State Version Restoration - Loads serialized data to return the document and selection to a previous state.
• State Persistence - Converts the current document and cursor selection into a serialized format for saving and reloading.
• Programmatic Selection and Insertion - Implements programmatic control over text selections and the insertion of HTML attachments at specific offsets.
• Event-Driven State Synchronizers - Automatically updates hidden form fields and external listeners whenever editor content changes.
• Text Coordinate Mapping - Calculates the exact pixel location of text offsets to accurately position user interface elements.
• Text Selection Control - Provides programmatic control to set the start and end positions of the user cursor and selection range.
• Content Insertion Utilities - Provides APIs to inject HTML, files, or attachments into a document at a specific cursor position.
• Undo-Redo History - Tracks typing and formatting changes to enable undo and redo operations for document states.
• HTML Sanitization Utilities - Features a configurable sanitization engine that removes unsupported HTML tags to mitigate security risks.
• Rich Text Editors - Rich text editor for everyday writing.
• Utility Components - Rich text editor component for web forms.

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