Add an edge label with Cytoscape.js
Map the label style property to a data field:
e.g. in the stylesheet on init
...{ selector: 'edge', style: { 'label': 'data(label)' // maps to data.label }} ...http://cytoscape.github.com/cytoscape.js/#style/properties
Older versions use content: in place of label:. Newer versions of 2.x allow label and also content for backwards compatibility.