A tiny svg javascript lib, Ability to quickly draw flowchart and topology graph.

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Two configurable modes: link-mode and render-mode.

• link-mode: quickly start flowchart config.

• render-mode: quickly drawing topological relationships.

 $ npm install flowchart-core

 $ yarn flowchart-core

// create topology graph, just use one statement.
import { RSGraph } from 'flowchart-core';
const nodes = [
    {
        id: 'root',
        children: ['node1', 'node2'],
        title: 'start',
        desc: '1',
        parent: null,
    },
    {
        id: 'node1',
        children: [],
        title: 'doing',
        desc: '2',
        parent: 'root',
    },
    {
        id: 'node2',
        children: [],
        title: 'end',
        desc: '3',
        parent: 'root',
    },
];

// create node div dom element. this just a case.
nodes.forEach(node => {
    const { title, desc } = node;
    const body = document.querySelector('body');
    const div = document.createElement('div');
    div.setAttribute('data-rsgraph-id', node.id);
    div.setAttribute('class', 'item');
    div.innerHTML = `<div class="desc">${desc}</div><div class="title">${title}</div>`;
    body.appendChild(div);
});

const config = {
    data: nodes,
    zoom: true, // default is false
    direction: 'x-axis', // x-axis || y-axis. default value is 'y-axis'
    coreOptions: {
        style: {
            borderTop: '1px dashed #000',
            overflow: 'scroll',
        },
        line: {
            style: {
                stroke: 'deepskyblue',
            },
            arrow: {
                style: {
                    fill: '#888',
                },
                viewBox: '0 0 18 18',
            },
        },
        linkDot: {
            display: 'none', // default is display: none
        },
        mode: 'link-mode', // set link-mode will not work.
    },
};

const graph = new RSGraph('#svg-container', config);

[warning] Add data-rsgraph-id attribute to the DOM element of node before using it.

<!-- html -->
<svg id="svg-container"></svg>

import { Core, Node } from 'flowchart-core';
// initial Core.
const core = new Core('#svg-container', {
    style: {
        width: 1000,
        height: 600,
        border: '1px dashed #000',
    },
    mode: 'link-mode',
});
// define node container width & height.
const width = 140;
const height = 70;
// initial Node.
const node = new Node({
    position: {
        x: 100,
        y: 50,
    },
    style: {
        width,
        height,
        strokeWidth: 2,
        stroke: 'black',
        cursor: 'grab',
        rx: 10,
    },
});

// zoom graph
core.zoom();

// add node to container
core.addNode(node);

• Type: { style: {}, line: {}, linkDot: {}, mode: 'render-mode' }

• Arguments:

  prop	type	desc	must
  style	stylesheet	css style	1
  line	lineObject	link path config	0
  linkDot	linkDotObject	link dot config	0
  mode	String	link-mode. render-mode.	1

  lineObject

  link line props.

  prop	type	desc	must
  style	stylesheet	css style	0
  arrow	arrowObject	line arrow config	0

  linkDotObject

  Only the following table styles can be used.

  prop	type	desc	must
  r	radius	<circle> attr r radius	0
  fill	fill color	color	0
  stroke	stroke color	color	0
  strokeWidth	stroke width	px	0
  display	css display	display value	0

  arrowObject

  prop	type	desc	must
  style	stylesheet	css style	0
  viewBox	String	svg viewBox	0

• Usage:

  const options = {
      style: {
          width: '100vw',
          height: '100vh',
          border: '1px dashed #000',
      },
      line: {
          style: {
              stroke: 'deepskyblue',
          },
          arrow: {
              style: {
                  fill: 'deepskyblue',
              },
              viewBox: '0 0 18 18',
              d: 'M1,2 L8,6 L1,10 Z',
          },
      },
      linkDot: {
          r: 2,
          fill: 'deepskyblue',
          stroke: 'deepskyblue',
          strokeWidth: 2,
      },
  };

• Type: { style: {}, position: { x, y }, html: { meta } }

• Arguments:

  prop	type	desc	must
  style	stylesheet	css style	1
  position	positionObject	node position in svg	1
  html	htmlObject	1	1

  positionObject

  prop	type	desc	must
  x	x axis	MouseEvent.clientX	1
  y	y axis	MouseEvent.clientY	1

  htmlObject

  prop	type	desc	must
  meta	DomInstance	Dom element	1

• Usage:

  const config = {
      position: {
          // node position in svg.
          x: 100,
          y: 150,
      },
      style: {
          width: 140,
          height: 70,
      },
      html: {
          meta: '<div>...</div>', // html template.
      },
  };

• Type: { style: {} }

• Arguments:

  prop	type	desc	must
  style	stylesheet	css style	1

• Usage:

  const config = {
      style: {
          stroke: 'deepskyblue',
      },
  };

• Type: { data: [], zoom: true, coreOptions: {} }

• Arguments:

  prop	type	desc	must
  data	Array	node relation data	1
  zoom	Boolean	zoom in or zoom out	0
  direction	String	change the direction of topological	0
  coreOptions	coreOptions	core config options	0

• Usage:

  const config = {
      data: nodes,
      zoom: true,
      direction: 'x-axis', // x-axis || y-axis. default value is 'y-axis'
      coreOptions: {
          style: {
              borderTop: '1px dashed #000',
              overflow: 'scroll',
          },
          linkDot: {
              display: 'none', // default is display: none
          },
          mode: 'link-mode', // set link-mode will not work.
      },
  };

// eg. how to appendChild a edge in core instance.
const coreInstance = new Core('#svg-container', { ... });
const edgeInstance = new Edge({ ... });
coreInstance.addEdge(edgeInstance, {
    source: sourceNode.id,
    target: targetNode.id,
    dotLink: 'bottom',
    dotEndLink: 'top'
});

// eg. how to change the position attribute.
const coreInstance = new Core('#svg-container', { ... });
const nodeInstance = new Node({ ... });
nodeInstance.changePosition({
    x: 130,
    y: 100,
});

More complex effects can be achieved through these exposure methods.

• Arguments:

  prop	type	desc
  container	SvgElement<svg>	Svg Dom
  nodes	Array<Object>	node dom list
  edges	Array<Object>	edge dom list
  nodeG	SvgElement<g>	<g> tag. nodes container
  edgeG	SvgElement<g>	<g> tag. edges container

• Arguments:

  prop	type	desc
  id	Number	unique node id
  node	SvgElement<g>	node container <g>. As real node to use. Accessible to all DOM attribute values on it
  html	String	html element embed in node inside
  style	stylesheet	node style

• Usage:

  // eg. how to make a node instance visible or hidden.
  const coreInstance = new Core('#svg-container', { ... });
  const nodeInstance = new Node({
      position: {
          x: 100,
          y: 100,
      },
      style: {
          width,
          height,
      },
  });
  const operatorType = 'node';
  // hidden.
  coreInstance.hiddenSvgElement(nodeInstance, operatorType);
  // visible.
  coreInstance.showSvgElement(nodeInstance, operatorType);

• Arguments:

  prop	type	desc
  id	Number	unique edge id
  edge	SvgElement<g>	edge container <g>
  source	Number	source node id
  target	Number	target node id
  dotLink	String	node start link dot's position: top | bottom| left | right
  dotEndLink	String	node end link dot's position: top | bottom | left | right
  lineData	String	link path data. <path> prop d

• Usage:

  // eg. create edge instance & append child on svg
  const coreInstance = new Core('#svg-container', { ... })
  const edgeInstance = new Edge({
      style: {
          stroke: 'deepskyblue',
      },
  });
  // key step.
  coreInstance.addEdge(edgeInstance, {
      source: sourceNode.id,
      target: targetNode.id,
      dotLink: 'bottom',
      dotEndLink: 'top'
  });

• self define html embed node

• flowchart config.

TimRChen