jquery力导向图

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Force-directed Graph Example</title>
    <script src="https://d3js.org/d3.v7.min.js"></script>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
<div id="graph"></div>
<script>
    const width = 800;
    const height = 600;

    const svg = d3.select("#graph")
        .append("svg")
        .attr("width", width)
        .attr("height", height);

    const simulation = d3.forceSimulation()
        .force("link", d3.forceLink().id(d => d.id))
        .force("charge", d3.forceManyBody())
        .force("center", d3.forceCenter(width / 2, height / 2));

    const graph = {
        nodes: [
            {id: "A"},
            {id: "B"},
            {id: "C"},
            // ... more nodes
        ],
        links: [
            {source: "A", target: "B"},
            {source: "B", target: "C"},
            // ... more links
        ]
    };

    const link = svg.append("g")
        .attr("stroke", "#999")
        .attr("stroke-opacity", 0.6)
        .selectAll("line")
        .data(graph.links)
        .enter().append("line")
        .attr("stroke-width", d => Math.sqrt(d.value));

    const node = svg.append("g")
        .attr("stroke", "#fff")
        .attr("stroke-width", 1.5)
        .selectAll("circle")
        .data(graph.nodes)
        .enter().append("circle")
        .attr("r", 10)
        .call(d3.drag()
            .on("start", dragStarted)
            .on("drag", dragged)
            .on("end", dragEnded));

    node.append("title")
        .text(d => d.id);

    simulation
        .nodes(graph.nodes)
        .on("tick", ticked);

    simulation.force("link")
        .links(graph.links);

    function ticked() {
        link
            .attr("x1", d => d.source.x)
            .attr("y1", d => d.source.y)
            .attr("x2", d => d.target.x)
            .attr("y2", d => d.target.y);

        node
            .attr("cx", d => d.x)
            .attr("cy", d => d.y);
    }

    function dragStarted(event, d) {
        if (!event.active) simulation.alphaTarget(0.3).restart();
        d.fx = d.x;
        d.fy = d.y;
    }

    function dragged(event, d) {
        d.fx = event.x;
        d.fy = event.y;
    }

    function dragEnded(event, d) {
        if (!event.active) simulation.alphaTarget(0);
        d.fx = null;
        d.fy = null;
    }
</script>
</body>
</html>