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Programming language: JavaScript
Tags: UI Components     Chart    
Latest version: v0.1.6

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README

react-charty npm version npm MIT

This component was born from the Telegram programming contest where I took one of the prize places. A big thanks to the Telegram team and all contestants. Read further to find usage instructions and how to customize this component.

Please check out the Demo App and Playground for example charts and usage!

Table of contents

Install

yarn add react-charty

or

npm install react-charty --save

Features

  • Small footprint (it's just 12KB minified and gzipped)
  • The following chart types are supported: Line, Multi Y Axis Line, Stacked Bar, Percentage, and Pie
  • Supports thousands of records (thanks to the fast Segment Tree algorithm)
  • A wide variety of supported browsers on different platforms (including mobile)
  • Theme support
  • Fancy animations
  • Zoom-in support
  • No dependencies, the core is vanilla Javascript
  • Can be used as a standalone library without React
  • Different chart types can be combined

Browsers support

IE 11 / Edge Firefox Chrome Safari iOS Safari Samsung Opera

Usage

Here's an example how to get a really basic chart like the one on this screenshot below. This demo is also available in the Playground. For more complex examples please check the Demo App.

```jsx static import React, { Component } from 'react' import Charty from 'react-charty'

const MINIMAL_EXAMPLE_DATA = { type: 'line', data: { x: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25], y0: [-20, 0, 20, 23, 25, 28, 40, 50, 33, 23, 14, 3, 15, 16, 18, 20, 34, 44, 30, 31, 43, 22, 15, 27, 23] }, colors: { y0: '#5FB641' }, names: { y0: 'Temperature, C°' }, startX: 1, endX: 25, xAxisStep: 2, showPreview: false, showRangeText: false, showLegendTitle: false };

export default class App extends Component { render () { return ( ) } }


## Theming

The chart controls can be customized via `theme` prop. Here's an example of two themes. The `LIGHT_THEME` is hardcoded in the Charty component and used if no theme is provided.
For a theme switching example please check the [Demo App](https://99ff00.github.io/react-charty/). Also, please check [styles.css](./src/styles.css) for even more customization.

```jsx static
const LIGHT_THEME = {
  grid: { color: '#182D3B', alpha: 0.1, markerFillColor: '#fff', markerRadius: 0 },
  legend: { background: '#fff', color: '#000' },
  preview: { maskColor: '#E2EEF9', maskAlpha: 0.6, brushColor: '#C0D1E1', brushBorderColor: '#fff', brushBorderAlpha: 1, handleColor: '#fff' },
  xAxis: { textColor: '#8E8E93', textAlpha: 1 },
  yAxis: { textColor: '#8E8E93', textAlpha: 1 },
  title: { color: '#000' },
  localRange: { color: '#000' },
  zoomedRange: { color: '#000' },
  zoomText: { color: '#108BE3' },
  zoomIcon: { fill: '#108BE3' },
  buttons: { color: '#fff' },
  pie: { textColor: '#fff' }
};

const DARK_THEME = {
  grid: { color: '#fff', alpha: 0.1, markerFillColor: '#242f3e' },
  legend: { background: '#1c2533', color: '#fff' },
  preview: { maskColor: '#304259', maskAlpha: 0.6, brushColor: '#56626D', brushBorderAlpha: 0, handleColor: '#fff' },
  xAxis: { textColor: '#A3B1C2', textAlpha: 0.6 },
  yAxis: { textColor: '#A3B1C2', textAlpha: 0.6 },
  title: { color: '#fff' },
  localRange: { color: '#fff' },
  zoomedRange: { color: '#fff' },
  zoomText: { color: '#108BE3' },
  zoomIcon: { fill: '#108BE3' },
  buttons: { color: '#fff' },
  pie: { textColor: '#fff' },
};

Props

Name Type Description
title String The chart title.
type String The chart type, can be one of the following values: line, bar, percentage_area, stacked_bar, multi_yaxis, pie. The default value is line. Feel free to check Demo App to see them all in action.
data Object Contains the data points for chart series. Every key of this object is an array of data points. The x array is mandatory and contains the data for x-axis while other keys represent the data points for y-axis. There could be multiple series in one chart and thus several data arrays for y-axis, for example y, y0, y1, yAxis etc. The key name can be any and is used as reference for name, color etc. The key name also defines the rendering order (alphabetically).
names Object Contains the names for data series, referenced by key. For example, names: { y0: 'Views', y1: 'Clicks' }.
colors Object Contains the colors for data series, referenced by key. For example, colors: { y0: '#4BD964', y1: '#FE3C30' }.
fillColors Object Contains the fill colors for data series (only line type is supported for now), referenced by key. A gradient fill is also supported. For example, fillColors: { "y1": "#FE3C3011", "y0": { "type": "linear_gradient_v", "colors": ["#4BD964", "#4BD964", "#FFFFFF00"] }}.
theme Object Contains the color theme for chart components. If omitted, the default theme will be used.
animated Boolean Enables/disables animations and transitions, default value is true.
startX Number The starting position of preview region. If not specified, the starting position of the preview region will be at 2/3 of x axis.
endX Number The ending position of preview region. If not specified, the ending position of the preview region will be at the end of x axis.
stepX Number The value to increase/decrease current x axis position when dragging or moving the chart preview region. For example, if you have X axis of type timestamp and you want to navigate by one day, you can set the stepX value to 86400000. The default value is 1.
showLegend Boolean If set to false the legend will not appear when moving the cursor over the chart (or tapping chart area on mobile). The default value is true.
showLegendTitle Boolean If set to false the legend title will not appear. The default value is true.
legendPosition String Defines the position of legend popup and can be one of the following values: top, bottom, cursor. The default value is cursor, which means the legend popup will follow the cursor position.
showMainArea Boolean If set to false the main chart area won't be visible. The default value is true.
showPreview Boolean If set to false the chart preview won't be visible. The default value is true.
showBrush Boolean If set to false the brush controls in preview area won't be visible. The default value is true.
showButtons Boolean If set to false the series buttons won't be visible. Also, the buttons are hidden if there's only one series of data. The default value is true.
showRangeText Boolean Show/hide current range text in top right corner. The default value is true.
rangeTextType String Defines the display type of current range. It could be one of the following DDT or can be function that accepts the x value of range starting and ending positions.
xAxisType String Defines the type of x axis. It could be one of the following DDT or can be function that accepts the x value and returns the formatted value.
yAxisType String Defines the type of y axis. It could be one of the following DDT or can be function that accepts the y value and returns the formatted value.
xAxisStep Number Defines the step for x axis. If not specified, the step value will be calculated automatically.
onZoomIn Function This callback is called when some point is clicked on chart. It should accept the clicked x position and must return Promise loading the next chart data. Originally, this callback was used to zoom in, i.e. display more details chart for selected x. But you can also use it to load any supported chart.
zoomInterval Number By default, when zomming, the chart will try to figure out the start and the end of x axis. But you can also set the interval to zoom in (for example, if x axis is a timestamp and you want to zoom in one week, the interval would be 604800000) and chart will put the current position in the middle of this interval.
zoomStepX Number Same as stepX, but for zooming chart.
autoScale Boolean Automatically finds the min/max y values and scales the chart accordingly. If this prop is set to false, the min/max values can be set with minY and maxY props. The default value is true.
minY Number Set the minimum value for y axis. This property is ignored if autoScale is set to true.
maxY Number Set the maximum value for y axis. This property is ignored if autoScale is set to true.

Display Data Types

Currently the following data types are supported. If no data type is specified the chart assumes it's just an integer value.

Type Description
number Integer value with thousands separator, i.e. 9 189 141
time Display time in format HH:mm, i.e. 09:42
date Display date in format MMM D, i.e. Jan 1
shortDate Same like date
longDate Display date in format D MMM YYYY, i.e. 8 Jun 2003
longDateWeekDay Same like longDate, but prepended with week day ddd, D MMM YYYY, i.e. Sun, 8 sep 2019
float1 Float value with one decimal place, i.e. 45.2
float2 Float value with two decimal places, i.e. 45.24

Using as a standalone library

The Charty component can be used as a standalone library without React, for example:

```html static ... window.addEventListener('load', function(){ var props = { title: '...', data: { ... } ... } var chart = new Charty('chart1', props); });