Kruskal's algo in javascript code example

Example: Kruskal’s Algorithm in javascript

const kruskal = graph => {  const { length } = graph;  const parent = [];  let ne = 0;  let a; let b; let u; let v;  const cost = initializeCost(graph); // {1}  while (ne < length - 1) { // {2}    for (let i = 0, min = INF; i < length; i++) { // {3}      for (let j = 0; j < length; j++) {        if (cost[i][j] < min) {          min = cost[i][j];          a = u = i;          b = v = j;        }      }    }    u = find(u, parent); // {4}    v = find(v, parent); // {5}    if (union(u, v, parent)) { // {6}      ne++;    }    cost[a][b] = cost[b][a] = INF; // {7}  }  return parent;};