cytoscape save graph as image by button

问题

I saw in the cytoscape.js tutorial that there are ways to represent the graph as image (png, jpg), but there is a way to represent it as regular graph, and if the user would want he can save it as image by click on button or similar option?

Didn't find simple way for that.

I am using python flask as my server side and cytoscape js for the graphes.

回答1:

You don't need server side code to save files from the browser anymore.

You can save files using the saveAs() API in JS. Here's a polyfill: https://github.com/eligrey/FileSaver.js/

If you want the graph data, it would just be

var jsonBlob = new Blob([ JSON.stringify( cy.json() ) ], { type: 'application/javascript;charset=utf-8' });

saveAs( jsonBlob, 'graph.json' );

Or for images

var b64key = 'base64,';
var b64 = cy.png().substring( content.indexOf(b64key) + b64key.length );
var imgBlob = base64ToBlob( b64, 'image/png' );

saveAs( imgBlob, 'graph.png' );

(Refer to other question re. base64toBlob())

来源：https://stackoverflow.com/questions/39168928/cytoscape-save-graph-as-image-by-button