env.addTest(name, fn)
Add a custom feature-detection test where name
is a string which uniquely identifies your feature test and fn
is a function that returns true
if the browser supports the feature, and false
if it does not.
joint.env.addTest('customTest', function() {
// Just as an example, we will always return true here.
return true;
});
if (joint.env.test('customTest')) {
// Feature is supported.
}