JSFiddle - React, Tailwind, and code Playground

JavaScript

const inf = 9999;
const graph = [
  [0, 5, 2, 10],
  [10, 0, 5, inf],
  [inf, inf, 0, 8],
  [inf, 1, 3, 0]
];

let floydWarshall = (graph) => {
  let mem = [];
  const size = graph.length;
  for (var i = 0; i < size; i++) {
    mem[i] = graph[i].slice();
  }
  for (var k = 0; k < size; k++) {
    for (var i = 0; i < size; i++) {
      for (var j = 0; j < size; j++) {
        if (mem[i][j] > mem[i][k] + mem[k][j]) {
          mem[i][j] = mem[i][k] + mem[k][j];
        }
      }
    }
  }
  console.log(mem);
};

floydWarshall(graph);