[Feature] Improve series highlight on legend hover event (by dimming other series)

[EWChina999]

What problem does this feature solve?

It would be useful if you could improve the series line highlight, especially on charts with many lines .

the example is http://jsfiddle.net/vitorbarbosa/qpByN/

What does the proposed API look like?

Only highlight the data series when mouse moves over the legend , at same time dimming the rest of series .

[susiwen8]

You can use series-line.blur
here is example

[EWChina999]

You can use series-line.blur here is example

@susiwen8 , thanks for your great help. ECharts is much powerful than Plotly. I checked this feature on Plotly , it is difficult to realize . there is long discussion here plotly/plotly.js#1847, nobody fixes it.