javascript - Synchronizing multiple graphs using nvd3 -

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i have 2 basic line graphs on page share same x axis. trying accomplish syncing these graphs when hovering on point on 1 graph, same hover event triggered on second graph.

so far have figured out how listen event via:

chart.lines.dispatch.on('elementmouseover.tooltip', function(e) {     // need trigger same event on xaxis of separate graph });

digging thru nvd3 , d3 source code hasn't brought revelation onto how accomplish far.

something should work guess. 

chart1.lines.dispatch.on('customevent', chart2.lines.dispatch.customevent);

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