vis.js is a dynamic, browser-based visualization library
 
 
 

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// Only load hammer.js when in a browser environment
// (loading hammer.js in a node.js environment gives errors)
if (typeof window !== 'undefined') {
var propagating = require('propagating-hammerjs');
var Hammer = window['Hammer'] || require('hammerjs');
module.exports = propagating(Hammer, {
preventDefault: 'mouse'
});
}
else {
module.exports = function () {
throw Error('hammer.js is only available in a browser, not in node.js.');
}
}