-md`# Bar Chart Race+md`# European Election Turnout by Country, 1979–2014-This chart animates the value (in $M) of the top global brands from 2000 to 2019. Color indicates sector. See [the explainer](/d/e9e3929cf7c50b45) for more. Data: [Interbrand](https://www.interbrand.com/best-brands/)`+See [the explainer](/d/e9e3929cf7c50b45) for more.`
-data = d3.csvParse(await FileAttachment("category-brands.csv").text(), d3.autoType)+data = d3.csvParse(await FileAttachment("eubarchart.csv").text(), ({name, value, year, colour, image}) => ({name, value: value / 100, date: new Date(Date.UTC(year, 0, 1)), color: colour, image}))
chart = { replay; const svg = d3.create("svg") .attr("viewBox", [0, 0, width, height]); const updateBars = bars(svg); const updateAxis = axis(svg); const updateLabels = labels(svg); const updateTicker = ticker(svg); yield svg.node(); for (const keyframe of keyframes) { const transition = svg.transition() .duration(duration) .ease(d3.easeLinear);-// Extract the top bar’s value. x.domain([0, keyframe[1][0].value]);updateAxis(keyframe, transition); updateBars(keyframe, transition); updateLabels(keyframe, transition); updateTicker(keyframe, transition); invalidation.then(() => svg.interrupt()); await transition.end(); } }
function bars(svg) { let bar = svg.append("g") .attr("fill-opacity", 0.6) .selectAll("rect"); return ([date, data], transition) => bar = bar .data(data.slice(0, n), d => d.name) .join( enter => enter.append("rect")-.attr("fill", color)+.attr("fill", d => colorByName.get(d.name)).attr("height", y.bandwidth()) .attr("x", x(0)) .attr("y", d => y((prev.get(d) || d).rank)) .attr("width", d => x((prev.get(d) || d).value) - x(0)), update => update, exit => exit.transition(transition).remove() .attr("y", d => y((next.get(d) || d).rank)) .attr("width", d => x((next.get(d) || d).value) - x(0)) ) .call(bar => bar.transition(transition) .attr("y", d => y(d.rank)) .attr("width", d => x(d.value) - x(0))); }
function labels(svg) { let label = svg.append("g") .style("font", "bold 12px var(--sans-serif)") .style("font-variant-numeric", "tabular-nums") .attr("text-anchor", "end")-.selectAll("text");+.selectAll("g");return ([date, data], transition) => label = label .data(data.slice(0, n), d => d.name) .join(-enter => enter.append("text")+enter => enter.append("g").attr("transform", d => `translate(${x((prev.get(d) || d).value)},${y((prev.get(d) || d).rank)})`)-.attr("y", y.bandwidth() / 2) .attr("x", -6) .attr("dy", "-0.25em") .text(d => d.name) .call(text => text.append("tspan") .attr("fill-opacity", 0.7) .attr("font-weight", "normal") .attr("x", -6) .attr("dy", "1.15em")),+.call(g => g.append("image") .attr("y", (y.bandwidth() - 40) / 2) .attr("x", -50) .attr("width", 40) .attr("height", 40) .attr("xlink:href", d => imageByName.get(d.name))) .call(g => g.append("text") .attr("y", y.bandwidth() / 2) .attr("x", -54) .attr("dy", "-0.25em") .text(d => d.name) .append("tspan") .attr("fill-opacity", 0.7) .attr("font-weight", "normal") .attr("x", -54) .attr("dy", "1.15em")),update => update, exit => exit.transition(transition).remove() .attr("transform", d => `translate(${x((next.get(d) || d).value)},${y((next.get(d) || d).rank)})`) .call(g => g.select("tspan").tween("text", d => textTween(d.value, (next.get(d) || d).value))) ) .call(bar => bar.transition(transition) .attr("transform", d => `translate(${x(d.value)},${y(d.rank)})`) .call(g => g.select("tspan").tween("text", d => textTween((prev.get(d) || d).value, d.value)))); }
-formatNumber = d3.format(",d")+formatNumber = d3.format(".1%")
function axis(svg) { const g = svg.append("g") .attr("transform", `translate(0,${margin.top})`); const axis = d3.axisTop(x)-.ticks(width / 160)+.ticks(width / 160, "%").tickSizeOuter(0) .tickSizeInner(-barSize * (n + y.padding())); return (_, transition) => { g.transition(transition).call(axis); g.select(".tick:first-of-type text").remove(); g.selectAll(".tick:not(:first-of-type) line").attr("stroke", "white"); g.select(".domain").remove(); }; }
-color = { const scale = d3.scaleOrdinal(d3.schemeTableau10); if (data.some(d => d.category !== undefined)) { const categoryByName = new Map(data.map(d => [d.name, d.category])) scale.domain(Array.from(categoryByName.values())); return d => scale(categoryByName.get(d.name)); } return d => scale(d.name); }+colorByName = new Map(data.map(d => [d.name, d.color]))
-margin = ({top: 16, right: 6, bottom: 6, left: 0})+margin = ({top: 16, right: 16, bottom: 6, left: 0})