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marijer/.block

Last active January 29, 2020 14:28
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.block
license: mit
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index.html
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<script src="https://d3js.org/d3.v4.min.js"></script>
<style>
body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
</style>
</head>
<body>
<div id='chart'></div>
<script>
const numPerRow = 20;
// const size= 20;
let width = 800;
let height = 400;
let size = Math.round(width / numPerRow);
const scale = d3.scaleLinear() // <-A
.domain([0, numPerRow -1])
.range([0, size * numPerRow])
let sel = d3.select('#chart')
.append('svg')
.attr('width', height)
.attr('height', width);
sel.selectAll('rect')
.data(d3.range(220)) // <-B
.enter().append('rect')
.attr('x', (d, i) => {
const n = i % numPerRow // <-C
return scale(n)
})
.attr('y', (d, i) => {
const n = Math.floor(i / 10) // <-D
return scale(n)
})
.attr('width', size)
.attr('height', size)
.attr('fill', 'tomato')
.attr('stroke-width', 2)
.attr('stroke', 'white')
</script>
</body>
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