cytoscape-popperjs

Description

Display popups on graph elements using Popper.js, a positioning library by Federico Zivolo and contributors.

Dependencies

• Cytoscape.js ^3.0.0
• Popper.js ^1.9.0

Usage instructions

Download the library:

• via npm: npm install cytoscape-popperjs,
• via bower: bower install cytoscape-popperjs, or
• via direct download in the repository (probably from a tag).

require() the library as appropriate for your project:

CommonJS:

var cytoscape = require('cytoscape');
var popperjs = require('cytoscape-popperjs');

popperjs( cytoscape ); // register extension

AMD:

require(['cytoscape', 'cytoscape-popperjs'], function( cytoscape, popperjs ){
  popperjs( cytoscape ); // register extension
});

Plain HTML/JS has the extension registered for you automatically, because no require() is needed. Make sure to use the UMD version of Popper.js if using with plain HTML/JS.

API

This extension may be used on both graph elements:

eles.popper({ /* options */ })

and on the core:

cy.popper({ /* options */ })

As a thin wrapper around Popper.js, all Popper.js options are supported within the popper key in options.

After its creation, the Popper can be retrieved via cy.scratch('popper') (if registered on the core) or ele.scratch('popper') (if registered on an element).

This extension will not automatically update the position of the Popper(s) as the graph is panned and zoomed. If this is desired, add an event listener for panning and zooming and in the body of the event callback, get the Popper with var popper = cy.scratch('popper') or var popper = ele.scratch('popper') and call popper.scheduleUpdate().

Examples

Core:

cy.popperjs({
  target: 'htmlElementId', // the ID of an HTML element to use as the popper; or,
  // a function which takes `cy` as its argument and returns a HTML element ID

  popper: { placement: "top" } // Popper.js-specific options
});

Collection:

cy.elements().popperjs({
  target: 'htmlElementId', // the ID of an HTML element to use as the popper; or,
  // a function which takes an element as its argument and returns a HTML element ID

  popper: { placement: "bottom" } // Popper.js-specific options
});

The function support for target is useful when adding many Poppers to many graph elements (with many corresponding HTML elements) as it enables registering all Poppers at once.

Publishing instructions

This project is set up to automatically be published to npm and bower. To publish:

1. Set the version number environment variable: export VERSION=1.2.3
2. Publish: gulp publish
3. If publishing to bower for the first time, you'll need to run bower register cytoscape-popperjs https://github.com/josephst/cytoscapejs-popper.git