@ant-design/graphs/es/core/utils/node.js

A React graph library based on Graphin

import { idOf, positionOf } from '@antv/g6';
import { memoize } from 'lodash';
/**
 * Get the side of the node relative to the reference node
 * @param nodeData - Node data
 * @param parentData - Reference node data
 * @returns The side of the node relative to the reference node
 */
export const getRelativeSide = memoize((nodeData, refNodeData) => {
    if (!refNodeData)
        return 'center';
    const nodePositionX = positionOf(nodeData)[0];
    const refNodePositionX = positionOf(refNodeData)[0];
    return refNodePositionX > nodePositionX ? 'left' : 'right';
}, (nodeData, refNodeData) => refNodeData ? [positionOf(nodeData), positionOf(refNodeData)].flat().join('-') : 'center');
/**
 * Get the side of the node relative to the parent node
 * @param graph - Graph instance
 * @param data - Node data
 * @returns The side of the node relative to the parent node
 */
export const getNodeSide = (graph, data) => {
    const parentData = graph.getParentData(idOf(data), 'tree');
    return getRelativeSide(data, parentData);
};
/**
 * Whether the node is a leaf node
 * @param nodeData - node data
 * @returns Whether the node is a leaf node
 */
export const isLeafNode = (nodeData) => {
    return !nodeData.children || nodeData.children.length === 0;
};