非常感谢您提前提供的帮助。
我正在尝试在我的 wordpress 网站上添加这个桑基图。
https://observablehq.com/@d3/sankey-diagram
我很难过。我下载了 JS 代码，将其粘贴在我的 wordpress 网站上，但它给了我很多错误
Uncaught SyntaxError: Unexpected token 'export'
是浏览器的第一个错误。
这是我在下面下载的代码：
<script src="https://d3js.org/d3.v5.js"></script>
<script>
// https://observablehq.com/@d3/sankey-diagram@273
export default function define(runtime, observer) {
const main = runtime.module();
const fileAttachments = new Map([["energy.csv",new URL("./files/d6774e9422bd72369f195a30d3a6b33ff9d41676cff4d89c93511e1a458efb3cfd16cbb7ce3fecdd8dd2466121e10c9bfe57fd73c7520bf358d352a92b898614",import.meta.url)]]);
main.builtin("FileAttachment", runtime.fileAttachments(name => fileAttachments.get(name)));
main.variable(observer()).define(["md"], function(md){return(
md`# Sankey Diagram
This [Sankey diagram](https://github.com/d3/d3-sankey) visualizes the flow of energy: *supplies* are on the left, and *demands* are on the right. Links show how varying amounts of energy are converted or transmitted before being consumed or lost. Data: [Department of Energy & Climate Change](http://www.decc.gov.uk/en/content/cms/tackling/2050/calculator_on/calculator_on.aspx) via [Tom Counsell](https://tamc.github.io/Sankey/)
`
)});
main.variable(observer("viewof edgeColor")).define("viewof edgeColor", ["html","URLSearchParams"], function(html,URLSearchParams){return(
Object.assign(html`<select>
<option value=input>Color by input
<option value=output>Color by output
<option value=path selected>Color by input-output
<option value=none>No color
</select>`, {
value: new URLSearchParams(html`<a href>`.search).get("color") || "path"
})
)});
main.variable(observer("edgeColor")).define("edgeColor", ["Generators", "viewof edgeColor"], (G, _) => G.input(_));
main.variable(observer("viewof align")).define("viewof align", ["html","URLSearchParams"], function(html,URLSearchParams){return(
Object.assign(html`<select>
<option value=left>Left-aligned
<option value=right>Right-aligned
<option value=center>Centered
<option value=justify selected>Justified
</select>`, {
value: new URLSearchParams(html`<a href>`.search).get("align") || "justify"
})
)});
main.variable(observer("align")).define("align", ["Generators", "viewof align"], (G, _) => G.input(_));
main.variable(observer("chart")).define("chart", ["d3","width","height","sankey","data","color","format","edgeColor","DOM"], function(d3,width,height,sankey,data,color,format,edgeColor,DOM)
{
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height]);
const {nodes, links} = sankey(data);
svg.append("g")
.attr("stroke", "#000")
.selectAll("rect")
.data(nodes)
.join("rect")
.attr("x", d => d.x0)
.attr("y", d => d.y0)
.attr("height", d => d.y1 - d.y0)
.attr("width", d => d.x1 - d.x0)
.attr("fill", color)
.append("title")
.text(d => `${d.name}\n${format(d.value)}`);
const link = svg.append("g")
.attr("fill", "none")
.attr("stroke-opacity", 0.5)
.selectAll("g")
.data(links)
.join("g")
.style("mix-blend-mode", "multiply");
if (edgeColor === "path") {
const gradient = link.append("linearGradient")
.attr("id", d => (d.uid = DOM.uid("link")).id)
.attr("gradientUnits", "userSpaceOnUse")
.attr("x1", d => d.source.x1)
.attr("x2", d => d.target.x0);
gradient.append("stop")
.attr("offset", "0%")
.attr("stop-color", d => color(d.source));
gradient.append("stop")
.attr("offset", "100%")
.attr("stop-color", d => color(d.target));
}
link.append("path")
.attr("d", d3.sankeyLinkHorizontal())
.attr("stroke", d => edgeColor === "none" ? "#aaa"
: edgeColor === "path" ? d.uid
: edgeColor === "input" ? color(d.source)
: color(d.target))
.attr("stroke-width", d => Math.max(1, d.width));
link.append("title")
.text(d => `${d.source.name} → ${d.target.name}\n${format(d.value)}`);
svg.append("g")
.attr("font-family", "sans-serif")
.attr("font-size", 10)
.selectAll("text")
.data(nodes)
.join("text")
.attr("x", d => d.x0 < width / 2 ? d.x1 + 6 : d.x0 - 6)
.attr("y", d => (d.y1 + d.y0) / 2)
.attr("dy", "0.35em")
.attr("text-anchor", d => d.x0 < width / 2 ? "start" : "end")
.text(d => d.name);
return svg.node();
}
);
main.variable(observer("sankey")).define("sankey", ["d3","align","width","height"], function(d3,align,width,height)
{
const sankey = d3.sankey()
.nodeId(d => d.name)
.nodeAlign(d3[`sankey${align[0].toUpperCase()}${align.slice(1)}`])
.nodeWidth(15)
.nodePadding(10)
.extent([[1, 5], [width - 1, height - 5]]);
return ({nodes, links}) => sankey({
nodes: nodes.map(d => Object.assign({}, d)),
links: links.map(d => Object.assign({}, d))
});
}
);
main.variable(observer("format")).define("format", ["d3","data"], function(d3,data)
{
const format = d3.format(",.0f");
return data.units ? d => `${format(d)} ${data.units}` : format;
}
);
main.variable(observer("color")).define("color", ["d3"], function(d3)
{
const color = d3.scaleOrdinal(d3.schemeCategory10);
return d => color(d.category === undefined ? d.name : d.category);
}
);
main.variable(observer("data")).define("data", ["d3","FileAttachment"], async function(d3,FileAttachment)
{
const links = d3.csvParse(await FileAttachment("energy.csv").text(), d3.autoType);
const nodes = Array.from(new Set(links.flatMap(l => [l.source, l.target])), name => ({name, category: name.replace(/ .*/, "")}));
return {nodes, links, units: "TWh"};
}
);
main.variable(observer("width")).define("width", function(){return(
954
)});
main.variable(observer("height")).define("height", function(){return(
600
)});
main.variable(observer("d3")).define("d3", ["require"], function(require){return(
require("d3@5", "d3-sankey@0.12")
)});
return main;
}
</script>
下载的代码与网页上的代码略有不同。我尝试了两个版本的代码。
我相信我对 D3 有一些不理解的地方，它是一个模块吗？我不确定在我的 wordpress 网站上上传此内容的正确方法。
这是该站点的 URL，以使事情变得更容易： http ://danielb66.sg-host.com/2001-2/