time-series-scroller v0.5.38

time-series-scroller

Specialized time-series-over-domain component focused on code quality and performance. 100% functional, yet not mature - still beta/under development (see project goals below). All components are written from scratch using D3 and primitive HTML elements, this is not a wrapper over a third-party library.

Getting started with the development version

git clone https://github.com/carldata/time-series-scroller.git
cd time-series-scroller
npm i
npm run dev

Demo

See it in action !

Getting started with the npm-dependency

npm i time-series-scroller --save-dev

Project goals

• High performance (works with 2M points)
• High maintainabilty
• Simplicity (KISS+DRY)
• High specialization (time series only !)
• SCSS variables imported as variables in JavaScript
• SCSS variables defining attributes / data structures for styling
• StoryBook demonstrations
• Zooming in/out redesigned
• Documentation
  • reusable actions/reducers
  • how to integrate
  • bucketing algorithm
  • how to draw in D3, problems encountered
• 100% test coverage
• Wrappers to / means of integration with the other frameworks (AngularJS, AngualarIO, Vue etc.)

Description

Simple, highly performant and customizable React/Redux module for displaying time series. When dug deeper, consists of the following components:

• HpSlider "scrollbar" for scrolling/selecting a piece of domain
• HpTimeSeriesChart for displaying time series in the domain
• HpTimeSeriesScroller incorporating the two above components into one.

Note that each of the components can be used separately for different purposes :) Eg. HpSlider can be used straight-away to control a temperature or humidity in an air-conditioning online controlling system :) HpTimeSeriesScroller component can be seen as a demo how HpSlider and HpTimeSeriesChart can interact - keep in mind HpTimeSeriesScroller is a fully stateful component that (currently) does not provide means to share the internal state with a Redux store. If you are not OK with this, write your own version !

Glossary

• domain - an (inclusive) range of integer numbers (from/to); keep in mind HpSlider, HpTimeSeriesChart components do not work on date-time values like "2015-03-04 12:45:40", but numbers (integers) translated from date-time values - it is quite easy to do this kind of conversion in JavaScript by calling Date.prototype.getTime
• hp = high performant

Testing

npm run test

Currently it checks the bucketing algorithm calculations:

 PASS  __tests__/time-series-chart/calculations.ts
  time-series-chart calculations test
    ✓ evenly distributed time series is placed into buckets properly (18ms)
    ✓ time series is transformed to no empty buckets (6ms)
    ✓ buckets are fed with proper data (17ms)
    ✓ not-evenly distributed series gets transformed to buckets under specific filter conditions - test A (6ms)
    ✓ not-evenly distributed series gets transformed to buckets under specific filter conditions - test B (2ms)
    ✓ not-evenly distributed series has no buckets but shadow buckets get found (8ms)

  console.log __tests__/time-series-chart/calculations.ts:31
    Running with hours: 17, distribution: 15, numberOfBuckets: 275

  console.log __tests__/time-series-chart/calculations.ts:48
    Running with minutes: 557, numberOfBuckets: 8, division: 5

Test Suites: 1 passed, 1 total
Tests:       6 passed, 6 total
Snapshots:   0 total

Exposing as npm package:

In src folder run:

grunt --os=osx //mac
grunt --os=win //windows

then

npm version patch