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index.html
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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>justchart</title>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bulma/0.7.1/css/bulma.min.css" />
<style>
td {
padding-right: 1em;
}
body {
animation: fadeIn 0.6s ease-in;
backface-visibility: hidden;
-webkit-backface-visibility: hidden;
}
textarea {
border-width: 3px;
outline: none;
}
@keyframes fadeIn {
from {
opacity: 0;
transform: translate3d(0, 0.5%, 0);
}
60% {
transform: translate3d(0, -0.1%, 0);
}
to {
opacity: 1;
}
}
</style>
</head>
<body>
<div class="container section">
<div class="is-pulled-right">
<button onclick="share()" class="is-pulled-right button is-success share">Share!</button>
<p class="">Click here to generate a shareable URL</p>
</div>
<h1 class="main-title title is-1">
<a href="/">Just chart!</a>
</h1>
<div class="container">
<div class="card">
<div class="card-body">
<div class="section">
<p id="selected-file">
<b>
Below you can see the example data set, with (x) and (y) values.
<br>
Rememeber that (x) can be both a time string as well as a numeric value.
</b>
</p>
<br>
<span id="is-shared" class="tag is-success">
This is a shared chart
</span>
</div>
</div>
</div>
</div>
<div class="container">
<!-- <p>Or drop your JSON here!</p> -->
<div class="section">
<label for="file">File (.json)</label>
<input name="file" id="file" type="file">
</div>
</div>
<div>
<h2 class="title is-4">Chart</h2>
<div id="dataset-chart"></div>
</div>
<br>
<br>
<div class="columns">
<div class="column">
<h2 class="title is-4">Raw</h2>
<div class="columns">
<div class="column">
<i>You can edit the raw JSON!</i>
</div>
<div class="column">
<button class="button pull-right" id="randomize">Generate sample data</button>
</div>
</div>
<div class="content">
<textarea style="height: 20rem" class="textarea" columns="200" rows="30" editable onkeyup="onDataChanged(event)" id="dataset-raw"></textarea>
</div>
</div>
<div class="column">
<h2 class="title is-4">Formatted</h2>
<br>
<br>
<div id="dataset" style="height: 20rem; overflow: scroll">
<div class="card">
<table id="dataset-table" class="table has-text-centered"></table>
</div>
</div>
</div>
</div>
<footer class="footer">
<h1 class="title is-1">About</h1>
<p>i needed a way to visualize sample data sets in the given format:</p>
<pre>
[
[
<time> || <number>,
<value>,
]
]
</pre>
With this small tool you can easily get an overview of the dataset, and even change it on the fly!
Let me know what you think on twitter <a target="_blank" href="https://twitter.com/christian_fei">@christian_fei</a>
</footer>
</div>
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<script type="text/javascript">
const tableEl = document.getElementById('dataset-table')
const datasetEl = document.getElementById('dataset-raw')
const chartEl = document.getElementById('dataset-chart')
const selectedFileEl = document.getElementById('selected-file')
const isSharedEl = document.getElementById('is-shared')
const jsonValidEl = document.getElementById('json-valid')
const jsonInvalidEl = document.getElementById('json-invalid')
const randomizeEl = document.getElementById('randomize')
randomizeEl.addEventListener('click', randomize)
const urlData = location.search.slice(1).split('&').map(p => p.split('=')).reduce((obj, [key, value]) => Object.assign(obj, { [key]: value }), {}).data
if (urlData) { isSharedEl.style.display = 'inline-block' } else { isSharedEl.style.display = 'none' }
if (!window.localStorage.getItem('json')) { window.localStorage.setItem('json', JSON.stringify(getSamples())) }
document.getElementById('file').addEventListener('change', handleFileSelect, false);
google.charts.load('current', {packages: ['corechart', 'line', 'annotationchart']})
google.charts.setOnLoadCallback(draw => drawData(getInitialData()))
function onDataChanged (event) {
try {
json = JSON.parse(datasetEl.value)
drawData(json), setJSONValid(true), persistJSON(json)
} catch (err) {
console.error(err), setJSONValid(false)
}
}
function share () {
const jsonString = window.localStorage.getItem('json')
if (jsonString) {
window.location.search = `data=${btoa(jsonString)}`
} else {
alert('there was a problem sharing the chart')
}
}
function persistJSON (json) { window.localStorage.setItem('json', JSON.stringify(json)) }
function setJSONValid (valid) {
if (valid) {
if (jsonValidEl && jsonValidEl.style) jsonValidEl.style.display = 'inline-block'
if (jsonInvalidEl && jsonInvalidEl.style) jsonInvalidEl.style.display = 'none'
if (datasetEl && datasetEl.style) datasetEl.style.borderColor = '#23d160'
} else {
if (jsonValidEl && jsonValidEl.style) jsonValidEl.style.display = 'none'
if (jsonInvalidEl && jsonInvalidEl.style) jsonInvalidEl.style.display = 'inline-block'
if (datasetEl && datasetEl.style) datasetEl.style.borderColor = '#ff3860'
}
}
function getInitialData () {
if (window.location.search && urlData) {
try { return JSON.parse(atob(urlData)) } catch (err) { alert('error parsing query string') }
}
const jsonString = window.localStorage.getItem('json')
if (!jsonString) return getSamples()
try { return JSON.parse(jsonString) } catch (err) { return getSamples() }
}
function randomize () {
console.log('randomize')
const json = getSamples()
drawData(json), setJSONValid(true), persistJSON(json)
}
function getSamples () {
console.log('getSamples')
const data = []
const HOURS = 1000 * 60 * 60
const INTERVAL = 48
let now = Date.now()
for (let i = 0; i < 30; i++) {
const time = new Date(now)
const value = Math.random() * 10 + 5
data.push([time, value])
now += Math.random() * HOURS * INTERVAL + HOURS * INTERVAL / 1.2
}
return data
}
function drawData (data) {
if (!Array.isArray(data)) return alert('<data> must be an array')
let mode = Number.isFinite(data[0][0]) ? 'number' : 'date'
// console.log('-- data[0][0], mode', data[0][0], mode)
// console.log('new Date(data[0][0])', new Date(data[0][0]), data[0][0])
drawOnChart(chartEl, data, mode)
drawOnTable(tableEl, data, mode)
drawOnData(datasetEl, data, mode)
}
function drawOnData (datasetEl, data, mode) {
datasetEl.value = JSON.stringify(data, null, 2)
}
function drawOnTable (tableEl, data, mode) {
tableEl.innerHTML = `<tr>
<th>x</th>
<th>y</th>
</tr>`
data.forEach(sample => {
if (!sample[0]) return
// console.log('sample[0]', sample[0])
const trEl = document.createElement('tr')
trEl.innerHTML = `
<td>${(mode === 'date') ? new Date(sample[0]).toISOString() : parseFloat(sample[0])}</td>
<td>${sample[1]}</td>
`
tableEl.appendChild(trEl)
})
}
function drawOnChart (chartEl, data, mode) {
if (!data || !data[0] || !data[0][0]) return
const options = {
title: '',
interpolateNulls: true,
hAxis: { title: 'x' },
vAxis: { title: 'y', direction: 'r' },
legend: { position: 'none' }
}
const dataForChart = [['x', 'y']].concat(data.map(i => [(mode === 'date') ? new Date(i[0]) : parseFloat(i[0]), i[1]]))
var chart = new google.visualization.LineChart(chartEl)
let dataTable = google.visualization.arrayToDataTable(dataForChart, false)
chart.draw(dataTable, options)
}
function handleFileSelect(evt) {
var files = evt.target.files
if (files.length < 1) throw new Error('please provide file')
const file = files[0]
var reader = new FileReader()
reader.onload = handleFileRead
reader.readAsText(file)
}
function handleFileRead(e) {
let json = JSON.parse(e.target.result)
drawData(json)
if (selectedFileEl && selectedFileEl.style) selectedFileEl.style.display = 'none'
}
</script>
</body>
</html>