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@minervaproject/html-text-collab-ext

v0.1.4

Published

Collaborative extension for HTML textareas

Downloads

375

Readme

HTML Text Collaborative Extensions

Build Status

A set of utilities that enhances a normal HTML <textarea> element with collaborative editing capabilities. The enhanced <textarea> is able to render the cursor and selection of other collaborators. A tooltip with the collaborator's username can be flashed when remote edits are made. The utility also allows for non-disruptive modification of the <textarea> where the local user's selection and cursor are not impacted by changes to the <textarea>contents.

Demo

The animation below shows the basic functionality provided by this library.

demo graphic

You can see a live demo here (Convergence does the real-time sync). The code for it can be found here.

Installation

Install package with NPM and add it to your development dependencies:

npm install --save-dev @convergence/html-text-collab-ext

Example Usage

HTML

<html>
  <body>
    <textarea id="example">
    Some example text to edit.
    </textarea>
  </body>
</html>

JavaScript

const textarea = document.getElementById("example");
const textEditor = new HtmlTextCollabExt.CollaborativeTextEditor({
  control: textarea,
  onInsert: (index, value) => console.log(`"${value}" was inserted at index ${index}`,
  onDelete: (index, length) => console.log(`"${length}" characters were deleted at index ${index}`,
  onSelectionChanged: (selection) => console.log(`selection was changed to ${JSON.stringify(selection)}`)
}

//
// Selection Management
//
const selectionManager = textEditor.selectionManager();

const collaborator = selectionManager.createCollaborator(
  "test", "Test User", "red", {anchor: 10, target: 20});
collaborator.setSelection({anchor: 5, target: 10});
collaborator.flashCursorToolTip(2);

selectionManager.removeCollaborator("test");

//
// Text Modification
//

// Insert text at index 10
textEditor.insertText(10, "Inserted Text");

// Delete 5 charachters at index 10
textEditor.deleteText(10, 5);

// Set the entire value.
textEditor.setText("New textarea value");

Development

  • Use npm install to install requried dependencies.
  • Use npm run dist to build the distribution package.
  • Use npm start to start the example application.