Javascript charting library

Question

I am looking for a JavaScript charting library. My requirements are:

For the moment, I am considering plotlyjs and HighCharts. Any help would be appreciated!

HighCharts is excellent but not free-of-cost. Is free-of-cost a requirement (as you listed) or not? — Basil Bourque, Jul 11 '18 at 6:56
Ideally yes. However, HighCharts is interesting because of affordable High-five License for pre-revenue or pre-financing startups which is applicable to us. — PeeWee2201, Jul 11 '18 at 9:10
HighCharts is nearly good but the way tooltips are implemented make it unfriendly to click on the links when the dataset is dense :-( — PeeWee2201, Jul 11 '18 at 11:15

Baby Palanidurai · Accepted Answer · 2018-07-13 07:34:08Z

Syncfusion EJ2 Chart for Angular supports most of the requirements.

2D line charts and bar charts

Supports different types of line series and bar series. Demo

For more information on line series and bar series refer
Zoom on X-axis with the possibility to synchronize zooming of several charts

For more information on zooming refer

Demo link
Mulitple lines on the same chart with same X-axis

Yes. We can have multi lines on the same chart with same X axis.

Demo link
Export to base64 data string (png)

Export to base64 Demo Link

And chart can also exported to other format. For more information on exporting follow the demo link.
1. PNG
2. SVG
3. JPG
4. PDF
Demo link

For more information on export refer
A way to add milestones on X-axis with icons

Milestones can be achieved by using annotation feature:

Demo link

For more information on annotation refer

Popup or popover with custom content and HTML links inside.

On move hover, a popup will show the information about points, we can customize this popup with template to show the custom content.

Demo link
Free, open-source

Commercial product, free option available under community license if you qualify (less than 1 million USD in revenue).
No huge dataset, probably SVG based is great.

Yes, our EJ2 chart component is SVG based.
CSS support

All the appearance can be customized by using in-built API’s.
I18N support

Yes, EJ2 Chart control support I18N
Usable with Angular

Yes usable with Angular platform. All the above mentioned samples are in Angular.

Note : I work for Syncfusion.

Please let me know if you have any queries.

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