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Last active May 17, 2022 06:02
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d3.js chart: handling window-resize
Raw
README.md

Run this example in a full screen, or click "Open".

data

$ curl https://raw.githubusercontent.com/holtzy/data_to_viz/master/Example_dataset/3_TwoNumOrdered_comma.csv | head -n4
date,value
2013-04-28,135.98
2013-04-29,147.49
2013-04-30,146.93
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
body {
position: fixed;
left: 0px;
right: 0px;
top: 0px;
bottom: 0px;
margin: 0px;
padding: 0px;
}
.line {
fill: none;
stroke: steelblue;
stroke-opacity: 0.4;
stroke-width: 2px;
}
.dot {
fill: #8080ff;
fill-opacity: 0.4;
}
g.x_axis path, g.y_axis path {
stroke: lightgray;
stroke-width: 1px;
}
g.x_axis line, g.y_axis line{
stroke: lightgray;
stroke-opacity: 0.7;
shape-rendering: crispEdges;
}
</style>
</head>
<body></body>
<script src="https://d3js.org/d3.v7.min.js"></script>
<script>
const margin = {top: 20, right: 40, bottom: 40, left: 60};
let dataSet;
(async () => {
const csvUrl = "https://raw.githubusercontent.com/holtzy/data_to_viz/master/Example_dataset/3_TwoNumOrdered_comma.csv";
dataSet = parseData(await d3.csv(csvUrl));
render();
setFileDrop();
})();
window.addEventListener("resize", debounce(render));
function parseData(data) {
const parseDate = d3.timeParse("%Y-%m-%d");
return data.map(d => {return {'date': parseDate(d.date), 'value': +d.value}}).filter(d => d.date);;
}
function render() {
const container = d3.select('body');
const containerArea = container.node().getBoundingClientRect();
const plotArea = {
'width': containerArea.width - margin.left - margin.right,
'height': containerArea.height - margin.top - margin.bottom};
// svg
d3.select('svg').selectAll('*').remove();
let svg = container.selectAll('svg').data([null]);
svg = svg.enter().append('svg').merge(svg)
svg = svg.attr("width", containerArea.width)
.attr("height", containerArea.height)
.append("g")
.attr("transform",
"translate(" + margin.left + "," + margin.top + ")");
// xy
const domain = {'x': d3.extent(dataSet, d => d.date),
'y': [0, d3.max(dataSet, d => d.value)*1.01]};
const x = d3.scaleTime().domain(domain.x).range([0, plotArea.width]);
const y = d3.scaleLinear().domain(domain.y).range([plotArea.height, 0]);
const f = {'x': d => x(d.date), 'y': d => y(d.value)};
// axes
svg.append("g")
.attr("class", "x_axis")
.attr("transform", "translate(0," + plotArea.height + ")")
.call(d3.axisBottom(x).ticks(10).tickSize(-plotArea.height));
svg.append("g")
.attr("class", "y_axis")
.call(d3.axisLeft(y).ticks(10).tickSize(-plotArea.width));
// line chart
svg.append("path")
.data([dataSet])
.attr("class", "line")
.attr("d", d3.line().x(f.x).y(f.y));
// scatter plot
svg.selectAll("dot")
.data(dataSet)
.enter().append("circle")
.attr("r", 2)
.attr("class", "dot")
.attr("cx", f.x)
.attr("cy", f.y);
}
function debounce(func, time){
time = time || 80;
let timer;
return function(event){
if(timer) clearTimeout(timer);
timer = setTimeout(func, time, event);
};
}
function setFileDrop(){
d3.select('svg')
.on('dragover', function(event, _) {
event.stopPropagation();
event.preventDefault();
})
.on('drop', async function(event, _) {
event.stopPropagation();
event.preventDefault();
let data = Array.from(event.dataTransfer.files).map(f => f.text());
data = await Promise.all(data);
dataSet = parseData(d3.csvParse(data.flat()[0]));
console.log(dataSet.length);
render();
});
}
</script>
</html>
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