danvk/dygraphs — pull request #499 by danvk (2014-11-29 05:54:35+00:00)
Title: Synchronization tool

Synchronizing multiple charts seems to be a common desire. This function in `extras` greatly facilitates it.

Usage:

```javascript
var g1 = new Dygraph(...),
g2 = new Dygraph(...),
g3 = new Dygraph(...);
var sync = Dygraph.synchronize(g1, g2, g3);
// the three charts are now synchronized
sync.detach();
// the three charts are now independent again
```