This project is part of the @thi.ng/umbrella monorepo.
Graphviz DOM abstraction as vanilla JS objects & serialization to DOT format. Provides several interfaces covering a large subset of GraphViz options and functions to serialize whole graphs (incl. subgraphs), nodes or edges. Supports both directed and undirected graphs.
Please see the GraphViz DOT guide for further details.
yarn add @thi.ng/dot
The source code of this example is also available in /test/example.ts.
import { serializeGraph } from "@thi.ng/dot";
// node type style presets
const terminal = {
color: "black",
fontcolor: "white",
};
// operator nodes use "Mrecord" shape
// with input and output port declarations
const operator = {
fillcolor: "yellow",
shape: "Mrecord",
ins: { 0: "a", 1: "b" },
outs: { "out": "out" }
};
serializeGraph({
directed: true, // default
// graph attributes
attribs: {
rankdir: "LR",
fontname: "Inconsolata",
fontsize: 9,
fontcolor: "gray",
label: "Generated with @thi.ng/dot",
labeljust: "l",
labelloc: "b",
// node defaults
node: {
style: "filled",
fontname: "Inconsolata",
fontsize: 11
},
// edge defaults
edge: {
arrowsize: 0.75,
fontname: "Inconsolata",
fontsize: 9
}
},
// graph nodes (the keys are used as node IDs)
// use spread operator to inject style presets
nodes: {
x: { ...terminal, label: "x (12)" },
y: { ...terminal, label: "y (23)" },
res: { ...terminal, label: "result (8050)", peripheries: 2 },
op1: { ...operator, fillcolor: "green", label: "op1\n(+)" },
op2: { ...operator, label: "op2\n(*)" },
},
// graph edges (w/ optional ports & extra attribs)
edges: [
{ src: "x", dest: "op1", destPort: 1 },
{ src: "y", dest: "op1", destPort: 0 },
{ src: "y", dest: "op2", destPort: 0, label: "xform", color: "blue" },
{ src: "op1", srcPort: "out", dest: "op2", destPort: 1 },
{ src: "op2", srcPort: "out", dest: "res"},
]
});Resulting output:
digraph g {
rankdir="LR";
node[style="filled", fontname="Inconsolata", fontsize="11"];
edge[arrowsize="0.75", fontname="Inconsolata", fontsize="9"];
"x"[color="black", fontcolor="white", label="x (12)"];
"y"[color="black", fontcolor="white", label="y (23)"];
"op1"[fillcolor="yellow", shape=Mrecord, label="{ <0> a | <1> b } | op1\n(+) | { <out> out }"];
"op2"[fillcolor="yellow", shape=Mrecord, label="{ <0> a | <1> b } | op2\n(*) | { <out> out }"];
"res"[color="black", fontcolor="white", label="res (805)", peripheries="2"];
"x" -> "op1":"1";
"y" -> "op1":"0";
"op1":"out" -> "op2":"1";
"y" -> "op2":"0"[label="xform", color="blue"];
"op2":"out" -> "res";
}- Karsten Schmidt
© 2018 Karsten Schmidt // Apache Software License 2.0