Visualization toolmaker. Founder @observablehq. Creator @d3. Former @nytgraphics. Pronounced BOSS-tock.
Published
Edited
Feb 6, 2020
9 forks
Importers
68 stars
words = {
const words = text.split(/\s+/g); // To hyphenate: /\s+|(?<=-)/
if (!words[words.length - 1]) words.pop();
if (!words[0]) words.shift();
return words;
}
measureWidth = {
const context = document.createElement("canvas").getContext("2d");
return text => context.measureText(text).width;
}
lineHeight = 12
targetWidth = Math.sqrt(measureWidth(text.trim()) * lineHeight)
lines = {
let line;
let lineWidth0 = Infinity;
const lines = [];
for (let i = 0, n = words.length; i < n; ++i) {
let lineText1 = (line ? line.text + " " : "") + words[i];
let lineWidth1 = measureWidth(lineText1);
if ((lineWidth0 + lineWidth1) / 2 < targetWidth) {
line.width = lineWidth0 = lineWidth1;
line.text = lineText1;
} else {
lineWidth0 = measureWidth(words[i]);
line = {width: lineWidth0, text: words[i]};
lines.push(line);
}
}
return lines;
}
textRadius = {
let radius = 0;
for (let i = 0, n = lines.length; i < n; ++i) {
const dy = (Math.abs(i - n / 2 + 0.5) + 0.5) * lineHeight;
const dx = lines[i].width / 2;
radius = Math.max(radius, Math.sqrt(dx ** 2 + dy ** 2));
}
return radius;
}
d3 = require("d3@5")
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
