javascript-d3How can I create a mindmap using d3.js?
A mindmap using d3.js can be created by following the steps below:
-
Create an SVG element to contain the mindmap.
var svg = d3.select("body").append("svg") .attr("width", 500) .attr("height", 500);
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Create a hierarchical tree layout.
var tree = d3.tree() .size([500, 500]);
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Create a data object to represent the mindmap.
var data = { "name": "Root", "children": [ { "name": "Child 1" }, { "name": "Child 2", "children": [ { "name": "Grandchild 1" }, { "name": "Grandchild 2" } ] } ] };
-
Create a data object to represent the mindmap.
var nodes = tree(data);
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Add nodes and links to the SVG element.
var link = svg.selectAll(".link") .data(nodes.links()) .enter() .append("path") .attr("class", "link") .attr("d", d3.linkHorizontal() .x(function(d) { return d.y; }) .y(function(d) { return d.x; }));
var node = svg.selectAll(".node") .data(nodes.descendants()) .enter() .append("g") .attr("class", function(d) { return "node" + (d.children ? " node--internal" : " node--leaf"); }) .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });
node.append("circle") .attr("r", 10);
node.append("text") .attr("dy", 3) .attr("x", function(d) { return d.children ? -8 : 8; }) .style("text-anchor", function(d) { return d.children ? "end" : "start"; }) .text(function(d) { return d.data.name; });
6. Output the mindmap.
## Helpful links
- [d3.js documentation](https://github.com/d3/d3/blob/master/API.md)
- [d3.js tree layout](https://github.com/d3/d3-hierarchy/blob/master/README.md#tree)
- [d3.js link generator](https://github.com/d3/d3-shape/blob/master/README.md#links)
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