JSFiddle - React, Tailwind, and code Playground

JavaScript

var my2DArray = [], i, j, tempRef;

for(i = 0; i < 5; i++){
  tempRef = my2DArray[i] = [];
  for(j = 0; j < 5; j++){
    tempRef.push("Array Position " + i + ", " + j);
  } 
}

alert(my2DArray[0][0]); //will alert "Array Postion 0, 0"
alert(my2DArray[1][4]); //will alert "Array Postion 1, 4"

alert(my2DArray.toSource());