AdjacencySet.js

function addNode(graph, nodeToAdd) {
    if(graph[nodeToAdd] === undefined) {
        graph[nodeToAdd] = new Set()
    }
    
    return graph
}

function addConnection(graph, origin, destination) {
    addNode(graph, origin)
    addNode(graph, destination)

    graph[origin].add(String(destination))

    return graph
}

function deleteConnection(graph, origin, destination){
    graph[origin].delete(String(destination))

    return graph
}

function deleteNode(graph, nodeToDelete) {
    delete graph[nodeToDelete]

    for(let node in graph) {
        deleteConnection(graph, node, nodeToDelete)
    }

    return graph
}

let graph = {};

addNode(graph, 'v1')
addNode(graph, 'v2')
addNode(graph, 'v3')
addNode(graph, 'v4')
addNode(graph, 'v5')
addNode(graph, 'v5')

addConnection(graph, 'v1', 'v2')
addConnection(graph, 'v1', 'v6')
addConnection(graph, 'v2', 'v4')
addConnection(graph, 'v2', 'v5')
addConnection(graph, 'v2', 'v6')
addConnection(graph, 'v3', 'v2')
addConnection(graph, 'v4', 'v3')
addConnection(graph, 'v5', 'v2')
addConnection(graph, 'v6', 'v5')