find the mode of all values in a map in typescript

index.ts
function findMode(inputMap: Map<any, any>): any {
  let frequencyMap = new Map();
  let maxFrequency = 0;
  let mode;

  for (let val of inputMap.values()) {
    let frequency = frequencyMap.get(val) || 0;
    frequencyMap.set(val, frequency + 1);
  }

  for (let [key, value] of frequencyMap) {
    if (value > maxFrequency) {
      maxFrequency = value;
      mode = key;
    }
  }

  return mode;
}
402 chars
20 lines

index.ts
let myMap = new Map<string, number>();
myMap.set("a", 1);
myMap.set("b", 2);
myMap.set("c", 2);
myMap.set("d", 3);

let mode = findMode(myMap); // Returns 2
157 chars
8 lines