SVG Gauge

Minimalistic, animated SVG gauge. Zero dependencies

Description

Check out the demo: http://codepen.io/naikus/pen/BzkoLL

Monthly Downloads: 0

Programming language: JavaScript

License: MIT License

Tags: Data Visualization     D3     SVG     Visualization     Animation     Gauge    

Latest version: v1.0.5

README

SVG Gauge

Minmalistic, configurable, animated SVG gauge. Zero dependencies

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Migration from 1.0.2

The new gauge uses a viewbox of 100x100 as opposed to previous 1000x1000. All the stroke and font values have to be adjusted accordingly in your CSS. Just divide those by 10

Demo

Check out the live demo for various options and styling tips for this gauge

Usage

HTML

<div id="cpuSpeed" class="gauge-container"></div>

CSS

.gauge-container {
  width: 150px;
  height: 150px;
  display: block;
  padding: 10px;
}
.gauge-container > .gauge .dial {
  stroke: #eee;
  stroke-width: 2;
  fill: rgba(0,0,0,0);
}
.gauge-container > .gauge .value {
  stroke: rgb(47, 227, 255);
  stroke-width: 2;
  fill: rgba(0,0,0,0);
}
.gauge-container > .gauge .value-text {
  fill: rgb(47, 227, 255);
  font-family: sans-serif;
  font-weight: bold;
  font-size: 1em;
}

Javascript

// npm install
npm install svg-gauge

// Require JS
var Gauge = require("svg-gauge");

// Standalone
var Gauge = window.Gauge;

// Create a new Gauge
var cpuGauge = Gauge(document.getElementById("cpuSpeed"), {
    max: 100,
    // custom label renderer
    label: function(value) {
      return Math.round(value) + "/" + this.max;
    },
    value: 50,
    // Custom dial colors (Optional)
    color: function(value) {
      if(value < 20) {
        return "#5ee432"; // green
      }else if(value < 40) {
        return "#fffa50"; // yellow
      }else if(value < 60) {
        return "#f7aa38"; // orange
      }else {
        return "#ef4655"; // red
      }
    }
});

// Set gauge value
cpuGauge.setValue(75);

// Set value and animate (value, animation duration in seconds)
cpuGauge.setValueAnimated(90, 1);

Options

Name	Description
dialStartAngle	The angle in degrees to start the dial (135)
dialEndAngle	The angle in degrees to end the dial. This MUST be less than dialStartAngle (45)
radius	The radius of the gauge (40)
min	The minimum value for the gauge. This can be a negative value (0)
max	The maximum value for the gauge (100)
label	Optional function that returns a string label that will be rendered in the center. This function will be passed the current value
showValue	Whether to show the value at the center of the gauge (true)
gaugeClass	The CSS class of the gauge (gauge)
dialClass	The CSS class of the gauge's dial (dial)
valueDialClass	The CSS class of the gauge's fill (value dial) (value)
valueClass	The CSS class of the gauge's text (value-text)
color (new)	An optional function that can return a color for current value function(value) {}
viewBox (new)	An optional string that specifies the crop region (0 0 100 100)

That's all good, but what about React?

import React, { useEffect, useRef } from "react";
import SvgGauge from "svg-gauge";

const defaultOptions = {
  animDuration: 1,
  showValue: true,
  initialValue: 0,
  max: 100
  // Put any other defaults you want. e.g. dialStartAngle, dialEndAngle, radius, etc.
};

const Gauge = props => {
  const gaugeEl = useRef(null);
  const gaugeRef = useRef(null);
  useEffect(() => {
    if (!gaugeRef.current) {
      const options = { ...defaultOptions, ...props };
      gaugeRef.current = SvgGauge(gaugeEl.current, options);
      gaugeRef.current.setValue(options.initialValue);
    }
    gaugeRef.current.setValueAnimated(props.value, 1);
  }, [props]);

  return <div ref={gaugeEl} className="gauge-container" />;
};

export default Gauge;

// to render:
const renderGauge = () => (
  <Gauge
    value={42}
    // any other options you want
  />
);

React w/ TypeScript?

import { useEffect, useRef } from 'react'
import SvgGauge, { GaugeOptions, GaugeInstance } from 'svg-gauge'

const Gauge = ({ value }: Props) => {
  const gaugeEl = useRef<HTMLDivElement>(null)
  const gaugeRef = useRef<GaugeInstance | null>(null)
  useEffect(() => {
    if (!gaugeRef.current) {
      if (!gaugeEl.current) return
      const options: GaugeOptions = { color: value => (value < 30 ? 'green' : 'red') }
      gaugeRef.current = SvgGauge(gaugeEl.current, options)
      gaugeRef.current?.setValue(1)
    }
    gaugeRef.current?.setValueAnimated(value, 1)
  }, [value])

  return (
    <div style={{ width: '500px', height: '500px' }}>
      <div ref={gaugeEl} />
    </div>
  )
}

interface Props {
  value: number
}

export default Gauge

And Angular?

Ha! It's already there