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interact

JavaScript drag and drop, resizing and multi-touch gestures with inertia and snapping for modern browsers (and also IE9+).

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Tekijä: Misha sama
Versio: 0.0.1.20250826182313
Luotu: 26.8.2025
Päivitetty: 26.8.2025
Size: 248 kt
Lisenssi: N/A

JavaScript drag and drop, resizing and multi-touch gestures with inertia and snapping for modern browsers (and also IE9+).

Features include:

inertia and snapping
multi-touch, simultaneous interactions
cross browser and device, supporting the desktop and mobile versions of Chrome, Firefox and Opera as well as Internet Explorer 9+
interaction with SVG elements
being standalone and customizable
not modifying the DOM except to change the cursor (but you can disable that)

Installation

npm: npm install interactjs
jsDelivr CDN: <script src="https://cdn.jsdelivr.net/npm/interactjs/dist/interact.min.js"></script>
unpkg CDN: <script src="https://unpkg.com/interactjs/dist/interact.min.js"></script>
Rails 5.1+:
1. yarn add interactjs
2. //= require interactjs/interact
Webjars SBT/Play 2: libraryDependencies ++= Seq("org.webjars.npm" % "interactjs" % version)

Typescript definitions

The project is written in Typescript and the npm package includes the type definitions, but if you need the typings alone, you can install them with:

npm install --save-dev @interactjs/types

Documentation

http://interactjs.io/docs

Example

var pixelSize = 16;

interact('.rainbow-pixel-canvas')
  .origin('self')
  .draggable({
    modifiers: [
      interact.modifiers.snap({
        // snap to the corners of a grid
        targets: [
          interact.snappers.grid({ x: pixelSize, y: pixelSize }),
        ],
      })
    ],
    listeners: {
      // draw colored squares on move
      move: function (event) {
        var context = event.target.getContext('2d'),
            // calculate the angle of the drag direction
            dragAngle = 180 * Math.atan2(event.dx, event.dy) / Math.PI;

        // set color based on drag angle and speed
        context.fillStyle = 'hsl(' + dragAngle + ', 86%, '
                            + (30 + Math.min(event.speed / 1000, 1) * 50) + '%)';

        // draw squares
        context.fillRect(event.pageX - pixelSize / 2, event.pageY - pixelSize / 2,
                         pixelSize, pixelSize);
      }
    }
  })
  // clear the canvas on doubletap
  .on('doubletap', function (event) {
    var context = event.target.getContext('2d');

    context.clearRect(0, 0, context.canvas.width, context.canvas.height);
  });

  function resizeCanvases () {
    [].forEach.call(document.querySelectorAll('.rainbow-pixel-canvas'), function (canvas) {
      canvas.width = document.body.clientWidth;
      canvas.height = window.innerHeight * 0.7;
    });
  }

  // interact.js can also add DOM event listeners
  interact(document).on('DOMContentLoaded', resizeCanvases);
  interact(window).on('resize', resizeCanvases);

See the above code in action at https://codepen.io/taye/pen/tCKAm

License

interact.js is released under the MIT License.

[ijs-twitter]: https://twitter.com/interactjs [upcoming-changes]: https://github.com/taye/interact.js/blob/main/CHANGELOG.md#upcoming-changes

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JavaScript drag and drop, resizing and multi-touch gestures with inertia and snapping for modern browsers (and also IE9+).

Installation

Typescript definitions

Documentation

Example

License