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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
The answer here is a vanilla CSS variables. Since they have pretty much good browser support except for IE11 (who cares about IE anyway?) why not to use them? And even if you do need to support IE11 there is a polyfill for it.
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